Question about Motorcycles
I am riding in high elevations and I keep fouling plugs. I have had to change out twice in one ride. I am cleaning the air filter now. My bike is fuel injected so it can't be a jetting problem. Any more suggestions?
This is an issue that has to be taken care of with reprogramming the ECM.
Posted on Jul 24, 2013
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Posted on Jan 02, 2017
what color is the spark plug when you take it out? All black too rich, a chalky white look is way too lean which is far worse than a rich mixture. I blew up my CR-80 when I was a kid from an improper fuel mixture. You really have to get that correct and the dealer can give you the numbers on that. Also you might wanna get a measuring cup from a local dollar store or discount store to help you add the correct mix into the gas. You said its boggy in 1st and 2nd....how is it from 3rd up? Has the carb been jetted for possibly a different exhaust pipe or filter that aren't on the bike anymore? Or did you change those components and not jet correctly? I'm going to log this as a solution, but its borderline a clarification request....
Posted on Apr 05, 2009
if three cylenders are running fine and 1 not with a wet plug, something is wrong with the one cable , its connection, shorting(make sure its not to close to the engine) or the plug
Posted on Jun 21, 2009
Two things could be at fault here. First - it's a good possibility you would benefit from a new top end. Top ends go away fast in these because they are single ringers. Under hard riding, the compression starts to fall off after just 2 hours. Poor compression means lower combustion temperatures which will lead the bike to run rich.
The other possibility is that your jetting is off. If you have had this bike for a while and it's always run well then slowly started to act up, its likely poor compression, but if you recently got this bike and do not know the history of it, then it could be a simple jetting issue - not at all uncommon for 2-strokes.
Also - no need to run the BR8EG. This is a resistor plug and is a higher performance plug. If you are a top Pro rider, you could feel the difference but for 99% of riders they could not tell the difference between a BR8EG and a B8ES. The B8ES is readily available from auto parts stores (NGK stock #2411) for $1.89 instead of $12+ for a EG plug form a bike shop. This info alone could save you a bunch of money. Keep in mind the stock plug is BR9EG, so you are running one step hotter which is fine.
Also keep in mind there is a lot of information that I do not know, nor do I know the overall condition of the bike. Internet diagnosis is always tricky, but I thought I would point these things out. I hope this has helped, but if not - we need more detailed info to properly diagnose the problem.
Posted on Feb 09, 2010
Rather the opposite, the engine is not getting hot enough to burn off the carbon deposits.
If all plugs are fouling it is probably not enough air in the mix
1st check your air filter is clean
2nd check air screw settings are 1-5/8 turns out
3rd check that main jets are 105s
Hope this helps(if so please mark as very useful)
Posted on Apr 16, 2010
SOURCE: We keep fouling spark plugs.
Several ways to try. Be sure the air filter is clean and without any tears or punctures, install an in-line fuel filter, gap the spark plug at .030, be sure the stock spark plug is used ( NGK CR7HSA ), be sure the muffler not plugged up at all, increase the idle speed, and change the gearbox oil every 2 or 3 months. The only other thing would be to de-carbon the piston and head but that requires the head to be removed. Taking the head off isn't hard but you must be sure to have the valve cam timed properly when reassembled. If not installed properly, you can bend a valve the first time you try to kickstart. Please rate my answer.
Posted on Jul 12, 2011
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