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spark plug foult
Posted: Mon Apr 09, 2007 4:07 pm
by jonbongai
HI, I have a Yamaha 1998 250 yz
ever 1hour I have to chance spark plug
I treid everthing
plaese can you help me
Posted: Mon Apr 09, 2007 8:04 pm
by Johnj
Uhh...maybe you need new rings.
Posted: Mon Apr 09, 2007 10:07 pm
by flynrider
What is fouling the plug or plugs? Oil? Gas? Carbon?
Posted: Wed Apr 11, 2007 6:18 am
by fireguzzi
Are you riding the dodo out of it? or are you just putting around slowly?
Posted: Thu Apr 12, 2007 9:02 am
by XJ1100
Since this bike is a 2-stroke...
It could be that you aren't running it hard enough to burn off carbon, most likely this is not the case.
Check to make sure the engine is not getting too much oil..
Check carburetor settings...(make sure it is not running too rich)
If they are all correct then check to see if your trans. oil level is slowly dropping. What could be happening is the trans. oil is leaking into your crankcase and causing the plug to carbon up and foul out. (Which would require a seal replacement)
Posted: Thu Apr 12, 2007 1:47 pm
by Sev
Are you using the right sparkplug?
Posted: Sun Apr 15, 2007 5:53 pm
by BuzZz
All of the above, 'cept the worn rings maybe, plus... Is the air filter dirty?
Change you pre-mix oil or mix ratio when this started?