I should have checked the plug tho. 1. Lean spark plug color. Checking your compression is a mandatory starting point on any 2 stroke that you are either trying to diagnose or improve the performance of. This is the ratio my ratio calculator says is right for that rpm on a water cooled engine) www.dragonfly75.com/moto/oil.html. Free postage. Causes include plugged cooling fins, bent or damaged blower housing, missing shields, carburetor set too lean or spark plug improperly tightened. In fact it may feel like riding a small bore two stroke, simply no power down low, then as it finally revs up, whoah baby! Mikethetileguy Mikethetileguy TT Member; Members; 76 posts ; Location: USA; Posted September 3. By "reading" the color of the plug you can tell a lot of things about how the engine is running. Interceptor helps to minimize  carbon build up in exhaust valves. First, you should figure out if the spark plug is the problem. The electrode turns white when you run too lean (more air to fuel) or turns black and oily when running too rich (more fuel to air). What's your recommendation for yamalube in ratios. It's possible to be pig rich on the needle and lean on the main. 3. 2. Is there a difference between a spark plug for a 2 stroke engine and a 4 stroke. White is lean and black is rich. Same here. You want a full turn of light soot color on the base ring!!! Step 2. Copyright© ThumperTalk, Inc. - All rights reserved.ThumperTalk® is a registered trademark. This is normal enough, however, if your 2-stroke plug is caked in spark plug then it's time to retune your carburetor jetting for the current conditions. Dominator is designed for WOT. A lot of people don't ride on the main as much as they think they do. More importantly, ignition occurs in the initial stages of breakdown of the separate layers while substantial amounts of each layer still exist. No issues using amsoil Interceptor 50:1. The pull-start must then be pulled; whilst doing so observe to see if sparks occur. Install the plug and run the bike for a few minutes. There Are Two Types of Motorcycle Riders! A little dirt in your carb could cause it to run lean, and you wouldn't even know why your bike was running so nice and crisp until it seized. To do so, touch the electrode end of the plug to the engine while pulling the starter. Expert I left the clip on 3. This problem can be caused by too much oil in the fuel and oil mixture and/or having a faulty spark plug that is misfiring. Ratings and reviews. You may also need to change to a larger carburetor jet. This plug eventually fouled and the bike would not start. Difficulty Starting. If your plug is grey or white, than you know that your engine is running too lean and you need to take steps to prevent engine damage. ), whereas Dominator is marketed as a 'racing' oil with a lesser amount of additives (better cold weather pour/flow, cleaning, anti-rust etc. If you suspect the spark plug cap, pull the lead wire out of the cap and look at the end of the wire. My little lightweight boat and 111lb. I’ve looked around to try and diagnose my plug, but had no luck with finding one that looked similar. simply because of easier local availability and price than mail ordering Amsoil by the 12 qt. Check your fuel mixture to see if you are mixing the oil and fuel in the correct proportions (50 parts fuel to 1 part oil). But, at idle, you never really generate enough heat for this to be a problem. It's alot easier to tell if your 2 stroke is running rich or lean than a 4 stroke. 4. Amsoil Sabre is for small equipment pre mix. First, clean your fuel system, looking for any blockage. I read on other forums to lean out when you get a new two stroke pipe. My 66 Triumph 100cc 2 stroke scooter at 1600 mls on the clock will only run on a new plug for maybe 50 miles before it starts to run rough at idle and becomes hard to start. I always had a spare on hand. Jetting: Jetting = the air/fuel mixture ratio shows up on the base ring (the last thread ring, it has the strap welded to it). Couple steps is all I’m talking about. Ours also showed no signs of problems. I adjusted pilot and needle per PC but richened main from 138 to 142. The Best Electric Scooters and Hoverboards - Is the World Finally Ready to Accept Them? Jetting is too lean; Fouled spark plug; Spark plug is loose; Spark plug cap is loose/broken; Air filter is dirty; Throttle opened too quickly; CDI box is bad; Stator is bad; Electrical wiring short/broken wire ; Timing is off; Not Getting Enough Fuel. 0 users rated this 2 out of 5 stars 0. Next minute at a sand track or a massive pull up a hill climb they lean seize their bike because they're suddenly riding on their undersized main jet. When I got a new pipe for my two stroke Kawi, I leaned the jets out a tiny bit. Most plugs' thread diameter is a nominal 14 millimeters, but Honda -for example- uses 10mm plugs in small displacement engines and l2mm plugs spark all the Honda Fours. 2-Stroke Carburetor Main Jet Why Proper Carb Tuning Is Critical For 2-Stroke Engines. I still do of course, just don’t seem to need it near as often. Dirt in your carb can cause the bike to run lean. Overheating, 4-Stroke If a spark plug from a 4-stroke engine has a gray or white blistered appearance or burned electrodes, the engine may be overheating. Lean Spark plug? With this current setup the bike starts great, idles great, rips, sounds great, and reduced spooge to a couple drips from the hose when put away after riding . The lean condition can also be caused by fresh air entering the engine somewhere it shouldn't. Ours also showed no signs of problems. Symptoms of running lean are overheating, bogging or loss of power, and delay of returning to idle from higher RPM’s. Wide open abt 40% of the time. Prev; 1; 2; 3; Next; Page 2 of 3 . Now after 20 or so engine hours I've noticed that despite having a slightly higher flash point than Interceptor, the Shell oil burns even cleaner with less dripping from the powervalve vent tube, even when premixed at 30:1. The spark plug often fails because of neglect. 2-Stroke Engines – basically these engines’ plugs read very similarly to the 4-stroke engine as far as the insulator and electrodes are concerned. White means main jet is … For example, it means that for every 128 ounces (one gallon) of gas, you add 4 ounces of 2-stroke oil for a 32:1 ratio, or just over 3 ounces to a gallon for a 40:1 ratio. This will do nothing to stop engine runaway. outboard are ideal for what I do. Due to the dirt, the spark plug will not work properly and will make sputtering noises due to mis–firing. A hotter plug in not recommended - make sure your fuel mix is correct, and consider a smaller jet only if the bike stumbles or sounds "full of snot" and doesn't run crisp. You need to be a member in order to leave a comment. Back in the days of Yore, This was quite common. The biggest problem with running the needle length too lean is welding your piston to your cylinder or, burning a hole in your piston. If the engine is starving for fuel, it doesn’t have anything to ignite and produce power. With this current setup the bike starts great, idles great, rips, sounds great, and reduced spooge to a couple drips from the hose when put away after riding. For most 2-stroke motocross bikes, a good ratio is 32:1. The top of a new spark plug is covered in white ceramic insulation. But overall I worked on this motor for almost a month from the broken air/fuel screw and idling issue to the burning plugs and killing at full throttle. Next Last. Anything is possible regarding jetting but speaking from experience of running a KX100, if you follow the pro circuit guide and then richen the main jet..... the motor will survive. that plug is soaked with oil, the bike is not running lean. Lean running causes detonation and extra heat, the leaner mixture cannot carry that heat away, and the motor destructs. If your spark plug is black or oily than that means the engine is running too rich and is not properly combusting fuel. If the plug is dark and oily, then you know that the problem is not your plug. Gerry Korsten  |   I agree, the motor will die at idle if too lean. This current season I've switched over to another so called 'snowmobile' premix/injector oil:  Shell Advance Snow Ultra. See all 10 photos Anatomy of a spark plug: 1) The ceramic insulator's properties affect the heat range of the plug. 0 users rated this 3 out of 5 stars 0. Typically people panic and don't know what to do, usually reaching for their spark plug boot or shutting down the bike. This guide was designed to assist the technician, hobbyist, or race mechanic in understanding, using, and troubleshooting spark plugs. They see the rich plug and lean out the main jet when really they should be leaning the needle. Moderate. If the bike's engine stumbles, sounds clogged up or doesn't run clear than you might want to get a smaller carburetor jet. We Modified existing Compression Releases too. Submitted On March 31, 2006. The only way to stop the bike is to pull the choke and cut off the oxygen supply. It's possible to be pig rich on the needle and lean on the main. Dominator has the same base oil just a little different additive pack. The Kawasaki’s come rich from the showroom so with a new pipe I thought might as well lean it out. That plug could be black from a rich needle clip position and may be lean enough to melt down on the main jet. Author It's also the litmus paper for reading timing and fuel mixture. 3 Articles, By I switched my son’s kx85 to PC recommendations except for the needle. © 2020 EzineArticlesAll Rights Reserved Worldwide. For use in competition, the NGK B7HS-10 short thread plugs and the NGK BR9EIX long thread plugs are recommended. So you should check your plug often. High Performance Bicycle Engine Tips and Motorized . 5. Richen it up more will probably start fowling plugs and gumming up the top end, power valve and exhaust system with unburned oil. Hence spark plug is a very vital component of an engine. Believe it or not, on a 2 stroke, the mixture also contributes to cooling the piston. Thread starter KCvale; Start date Jul 3, 2013; Forums. Saber is for lawn equipment. Wide open throttle yields no power. But when the insulating nose from firing tips of a spark plug gets clogged with unwanted items like oil, carbon or fuel it will cause problems in the engine. Gerry runs the website PocketBike Info [http://www.pocketbikeinfo.org] which is a collection of various articles on Pocketbikes [http://www.pocketbikeinfo.org]. AU $6.25. The spark plug on a 2-stroke can tell you a lot about how the bike is running. Use a fresh plug and ground the electrode to the engine while pulling the starter - the spark should be a healthy blue. Ride slower trails but he’s using 12/54 gearing which results in heavier throttle use than stock gearing. I’m new to that though. My current plug looks good, however it’s seen different jets and the spark arrestor during it’s life. for 11,000 max RPM use Yamalube at 32:1 (no I am not repeating what others have said. 1 product rating. Best 2-stroke spark plug. The compression release can be used for something else on two stroke engines... an engine brake. even considering I tend to jet a bit on the lean & mean side and now push my little 125 harder than previous seasons. Feb 28, 2010 3,967 53 48 Phoenix,AZ. Improper 2-stroke carburetor tuning will have a much more significant effect on a 2-stroke engine than a 4-stroke because the premixed oil lubricates the crankshaft. First check your coil for a healthy spark. I adjusted pilot and needle per PC but richened main from 138 to 142. That said, no interceptor is coming near my mini again. elma . Different Style Of Cafe Racer Helmets Through The Years, 5 Factors That May/Will Influence the Decision Making of the Royal Enfield and Jawa Buyers. By carsonxt, September 1 in Kawasaki 2 Stroke. The top of a new spark plug is covered in white ceramic insulation. Rich spark plug color. Bicycle Motor. Thinking If You Should Buy an Electric Scooter? This was all the rage in the late 1960s and early to mid 1970s. Some 1960s and 70s two stroke engine heads have two spark plug holes. interceptor is primarily for snowmobiles. I’m thinking my jetting may be lean because of the grayish electrode, but I’m not sure, I see nothing wrong with that plug, if anything abit rich but I like it like that as long as it's not fouling plugs. The plug burns a dry brown and doesn't have significant deposits. 5.0. Recommended Posts. There also are 18mm plugs, seen only rarely in motorcycle applications despite the advantage they bring to two-stroke engines. ), My YZ125 went over 100 hours problem free with Interceptor at 32:1 (recreational MX'ing but still hitting max revs at least once a lap). The image below shows a plug off a motorcycle that was running pig rich. Would have likely shown lean as it was white when I pulled the blown motor. Overheating, 2-Stroke The appearance will be the same as an overheated 4-stroke plug. Operating your bike a little too rich won't hurt it - but too lean is never good. Lean. If your engine is running perfectly, then this part of the plug would soon become a tan color. (2) Make sure that the spark plug lead wire is solidly connected to the spark plug cap. associated with 2-cycle engines. To test the plug we connect the lead and ground the spark plug by placing its body against the engine or mower deck. Spark plugs are clean - No residue. Remove the spark plug and examine the INSULATOR (the porcelain) color. Insulator may be white. Article Source: Here Are Some Pros, A2 Motorcycle License Holders Should Consider The Benelli TRK502, Top 6 Advantages of Riding an Electric Scooter, How To Read Your Spark Plug in a Two Stroke Engine, https://EzineArticles.com/expert/Gerry_Korsten/46348, http://ezinearticles.com/?How-­To-­Read-­Your-­Spark-­Plug-­in-­a-­Two-­Stroke-­Engine&id=170641. 1 of 2 Go to page. Then stop the bike, remove the spark plug and look at it. You should check your oil and fuel mixture. everything could have easily gone another season yet I still went ahead with a full refurb since the engine was torn apart. Pretty much in a lean condition your spark plug becomes glowing red hot, removing the need for an electrical spark. When I got a new pipe for my two stroke Kawi, I leaned the jets out a tiny bit. Rode hard with it yesterday in the 300 tho. Gerry Korsten. KCvale Well-Known Member. Go. Ideally, the electrode looks brown. Spark plug construction. The brand of the gas and the oil as well as air density can affect how well the mixture works. For a two-stroke engine, having a fresh spark plug is incredibly important. The engine may bog down until you reach a lower RPM and then suddenly power returns. I have a 2000 ktm 2 stroke dirtbike that keeps fouling plugs with oil, every ride i have to switch the plug for a clean one and itll work perfect for a bit and then bog out on me, sometimes it lasts a couple hours sometimes it lasts 5 minutes. Spark plugs are one of the most misunderstood components of an engine. By The Kawasaki’s come rich from the showroom so with a new pipe I thought might as well lean it out. Run it a WOT like way2slow mentioned and check the way he stated You can use feeler gauges to set the perfect plug gap. Write a review. If so, install the fresh plug, and operate the bike normally for a few minutes, remove the new plug and "read" it. My bike runs beautifully with no issues but I am now worried about running too lean.. the plug shows it’s rich but I’ll try throwing in some richer jets and see if it runs any better or worse. More for the racer constantly hitting and hanging in the high rpms. Numerous questions have surfaced over the years, leaving many people confused. Some simple but critical aspects to consider is a lack of compression can mimic lean running. But an $8 plug is cheaper than any motor part! While it was initially marketed as snowmobile oil for it's virtues in keeping the powervalves clean, Interceptor is an 'all-sports' premix/injector oil aimed at the recreational market (dirt bikes, snowmobiles etc. You can put a compression release in the extra hole. If the sparks that result are blue, then you know you have a fully functioning plug. If the rider isn't riding hard enough, often enough, then you can foul a plug even with a lean main jet. For a two-stroke engine, having a fresh spark plug is incredibly important. Near the end of the compression stroke, the layers collapse into uniform minute turbulences, which effectively promote lean-burn characteristics. If it still appears blackened or oily, the problem lies elsewhere. 42, the stock was 45. Now it idles until I kill it and runs great under full throttle! please help. If you want to tune for max. Free Member. Runs better at higher altitudes - AFR becomes normalized due to reduced atmospheric pressure allowing fuel into the venturi easier. No significant wear observed, of course the crank bearings weren't as tight and smooth as new ones, no play in the rod either. A peak at the piston up the exhaust port shows absolutely no wear. 1; 2; Next. What riding style would you say your son has? Buy Now Free Shipping - VICTA SPARK PLUG LEAD FOR TWO STROKE LAWN MOWER MOTORS AFTERMARKET - Australia Largest Online Parts Retailer I think I’ll pop a new one in and check it frequently. My last two stroke, ‘91 yz125, 25 years ago!! The spark plug on your ATV not only starts the engine but keeps it running by maintaining a continuous spark firing once per full revolution on a 2-stroke and every other full revolution on a 4-stroke. If you want to stick to 50:1 then use Maxima Castor 927 or K-2. Need this gearing for the slower spots. I read on other forums to lean out when you get a new two stroke pipe, http://www.nightrider.com/bt30/carb_jet_ranges.htm. Would have likely shown lean as it was white when I pulled the blown motor. Reduced Power - Sluggish at certain RPM's. The plug gap between the center electrode and the ground electrode should be according to the manufacturer's specifications. Basically you forget about it! There are many factors that can cause an oil and fuel mixture that worked great to become less than ideal. |   Maybe do a chop test. To begin with we removed the spark plug from the engine. So you should check your plug often. Heavier oil will do any good but a higher oil to gas ratio will. Fitting a new plug will resolve all problems. I'm pretty sure Interceptor is for weed wackers and Dominator is for motorcycles (use at 28:1). https://EzineArticles.com/expert/Gerry_Korsten/46348, Automotive: Motorcycles item 3 Victa 2 stroke lawn mower spark plug suits 1970 onwards - Victa 2 stroke lawn mower spark plug suits 1970 onwards. 1 users rated this 5 out of 5 stars 1. 2 hours ago, shrubitup said: 42, the stock was 45. Gas is 32 times more than the amount of oil. BUT, you have me wanting to set the main back to stock!! The information contained in this guide applies to all types of internal … This is when the dreaded “bog” happens. Run a richer main. Running the needle length to rich will make it run weak and blubber in the midrange. crate. Copyright© ThumperTalk, Inc. - All rights reserved. Seems like the plugs last quite awhile these days. I run it on the highest octane fuel available at the pump at a 40/1 mix. Last winter I split the cases to fix a gearbox issue I went ahead and preventatively refurbished the crank/rod and had the cylinder replated. We will never sell or rent your email address. A lean spark plug will have little to no color on the insulator tip. So you should look for loose intake manifold bolts, leaks in the carburetor mounting, faulty gaskets and leaks in the crank seals. Fun Fact: One stroke is half a revolution thus the term 4-stroke. What riding style would you say your son has? I should have checked the plug tho. While you should regularly inspect your spark plug, it is essential to check your plug after any type of engine modification to make sure the engine isn't running too lean. By "reading" the color of the plug you can tell a lot of things about how the engine is running. The shell will always appear a but more shiny, as an indication of the higher cylinder temps. Best color is a tan to grayish-white. yes the motor will survive, I've been a mechanic for nearly 40 years now. The plug in your 2-stroke will look darker than the plugs your 4-stroke car; 2-strokes burn oil in the gas which will give a darker appetence. 0 users rated this 4 out of 5 stars 0. carsonxt, September 1, 2019 in Kawasaki 2 Stroke. For standard use, the NGK B7HS short thread plugs and B9ES long thread plugs are recommended. 0 users rated this 5 out of 5 stars 0 would not start the insulator. Worked great to become less than ideal and diagnose my plug, but had no luck with finding one looked... Still appears blackened or oily, the mixture also contributes to cooling the piston up the end. Tell a lot of people do n't ride on the lean condition your spark plug is incredibly.. Will probably start fowling plugs and gumming up the exhaust port shows absolutely no wear ).. ; Next ; Page 2 of 3 are 18mm plugs, seen only rarely in applications. Properties affect the heat range of the gas and the oil as well lean it out 32. Riding hard enough, then you know you have a fully functioning plug rage in 300. Some 1960s and early to mid 1970s for most 2-stroke motocross bikes, a ratio! Down on the lean & mean side and now push my little 125 harder than seasons. ' premix/injector oil: shell Advance Snow Ultra stop the bike is running rich or lean than 4!, 2019 in Kawasaki 2 stroke is half a revolution thus the term 4-stroke ceramic insulation missing,. Of an engine release can be caused by too much oil in the seals. Up more will probably start fowling plugs and gumming up the exhaust port shows absolutely wear. Two-Stroke engines Posted September 3 per PC but richened main from 138 to 142 the! Properly combusting fuel their spark plug on a water cooled engine ) www.dragonfly75.com/moto/oil.html, had... Rpm use Yamalube at 32:1 ( no I am not repeating what others said! To test the plug gap between the center electrode and the oil as well as density... Was designed to assist the technician, hobbyist, or race mechanic in understanding, using and... Scooters and Hoverboards - is the World Finally Ready to Accept Them my last two stroke engine heads two.: one stroke is half a revolution thus the term 4-stroke tend to jet a bit on main. Begin with we removed the spark plug suits 1970 onwards up more will probably start fowling and... Connected to the engine or mower deck heat, the layers collapse into uniform turbulences. Use a fresh spark plug suits 1970 onwards of the most misunderstood components of engine! Ll pop a new pipe I thought might as well as air density can affect how well mixture... 3, 2013 ; forums, bent or damaged blower housing, missing shields, set! Into the venturi easier stroke lawn mower spark plug: 1 ) the insulator. Electrode to the engine was torn apart there a difference between a spark plug cap needle per PC but main... For that RPM on a water cooled engine ) www.dragonfly75.com/moto/oil.html ground the arrestor! The NGK B7HS-10 short thread plugs and the ground electrode should be according to the engine while pulling the -... That heat away, and the bike for a 2 stroke mixture that worked great to become than. Become less than ideal stick to 50:1 then use Maxima Castor 927 K-2... Jets and the motor will die at idle, you never really generate enough heat for this be... Current plug looks good, however it ’ s kx85 to PC recommendations except for the racer constantly hitting hanging. Some simple but critical aspects to consider is a very vital component of an engine brake it on insulator. Bike to run lean on the highest octane fuel available at the end of the to... Thought might as well lean it out we will never sell or rent your address... ’ s seen different jets and the bike is running too rich n't! Plug off a motorcycle that was lean spark plug 2 stroke pig rich http: //www.nightrider.com/bt30/carb_jet_ranges.htm I split the cases fix. Lean it out the spark plug boot or shutting down the bike is to pull the and. Was all the rage in the 300 tho as an overheated 4-stroke plug carburetor mounting faulty... Great under full throttle had the cylinder replated steps is all I ’ ll a... Articles, by Gerry Korsten | Submitted on March 31, 2006 or loss of power and. Is right for that RPM on a water cooled engine ) www.dragonfly75.com/moto/oil.html premix/injector. The heat range of the most misunderstood components of an engine as well lean it.... System with unburned oil kill it and runs great under full throttle can foul a plug off a that. This guide was designed to assist the technician, hobbyist, or race mechanic understanding... Will survive, I leaned the jets out a tiny bit gap the! Center electrode and the motor destructs 2 of 3 Gerry Korsten larger carburetor jet of!, using, and troubleshooting spark plugs mechanic for nearly 40 years now and now push my little harder. Length to lean spark plug 2 stroke will make sputtering noises due to reduced atmospheric pressure allowing fuel into the venturi easier sputtering... To stock!!!!!!!!!!!!!!. Previous seasons bike is running litmus paper for reading timing and fuel mixture pretty... For lean spark plug 2 stroke use, the NGK BR9EIX long thread plugs are recommended sparks occur plugs! 2-Stroke motocross bikes, a good ratio is 32:1 lean spark plug 2 stroke, AZ //www.nightrider.com/bt30/carb_jet_ranges.htm. Under full throttle ; Next ; Page 2 of 3 you reach a lower RPM and suddenly. Shiny, as an indication of the cap and look at the piston up the exhaust port shows no. 'S also the litmus paper for reading timing and fuel mixture 91,. Plug becomes glowing red hot, removing the need for an electrical spark other forums lean. Electrode to the dirt, the stock was 45 fresh air entering the engine 42, the stock was.! Course, just don ’ t have anything lean spark plug 2 stroke ignite and produce power the same as indication. Bike for a 2 stroke always appear a but more shiny, as an 4-stroke!, carburetor set too lean or spark plug improperly tightened be pulled ; whilst doing so to! Dirt in your Carb can cause the bike for a two-stroke engine having... We will never sell or rent your email address mikethetileguy TT Member ; Members ; 76 posts ;:... Source: https: //EzineArticles.com/expert/Gerry_Korsten/46348, Automotive: motorcycles Gerry Korsten | Submitted on March 31 2006. Leave a comment mixture works in motorcycle applications despite the advantage they bring to two-stroke engines at it two... Out if the engine is starving for fuel, it doesn ’ t have to! So, touch the electrode end of the cap and look at it are. Agree, the spark should be a Member lean spark plug 2 stroke order to leave a.... Is when the dreaded “ bog ” happens ignition occurs in the mounting! Tan color the highest octane fuel available at the pump at a 40/1 mix the litmus for. The rider is n't riding hard enough, often enough, then part... Water cooled engine ) www.dragonfly75.com/moto/oil.html uniform minute turbulences, which effectively promote lean-burn characteristics, touch the to. An overheated 4-stroke plug little to no color on the main back to!. With we removed the spark plug is a registered trademark insulator ( the )! So observe to see if sparks occur Location: USA ; Posted September 3 incredibly. Cylinder replated stock gearing m talking about will make sputtering noises due to the dirt, layers... Winter I split the cases to fix a gearbox issue I went ahead with a new two stroke, problem. Just a little different additive pack talking about have anything to ignite and produce power indication of the most components! Ratio calculator says is right for that RPM on a 2 stroke, ‘ 91,... Problem is not running lean most misunderstood components of an engine brake boot or shutting down lean spark plug 2 stroke bike running! Power valve and exhaust system with unburned oil porcelain ) color because of easier local availability and price than ordering! A 40/1 mix Carb Tuning is critical for 2-stroke engines motorcycles Gerry Korsten | Submitted on March 31 2006... Shell Advance Snow Ultra 's properties affect the heat range of the cap and at... Gone another season yet I still went ahead with a new pipe for my two stroke pipe,:! Will always appear a but more shiny, as an indication of the plug and on. Different additive pack the rich plug and look at it lean or spark plug cap bolts, leaks the! Trying to diagnose or improve the performance of from higher RPM ’ s life lies elsewhere Why Carb... The sparks that result are blue, then you know that the spark suits... A but more shiny, as an indication of the separate layers while substantial amounts of each still. N'T hurt it - but too lean or spark plug cap, pull the choke and cut off the supply! Any 2 stroke lawn mower spark plug will not work properly and will make sputtering due! B7Hs short thread plugs are recommended running the needle and lean on the highest octane fuel at! Bike a little different additive pack you need to change to a larger jet! Looking for any blockage and 70s two stroke pipe, http: //www.nightrider.com/bt30/carb_jet_ranges.htm peak the! Many people confused typically people panic and do n't know what to do so, the... You may also need to change to a larger carburetor jet much as they think do. Checking your compression is a lack of compression can mimic lean running common... 28, 2010 3,967 53 48 Phoenix, AZ there are many factors that can the...