i just bought a yz 125 . it sat for about 2 years. i changed the petrol and two stroke. its fouls the spark plug after about 20 seconds. it keeps doing this.
Your going to need to jet out the carborator, and maybe turn the idol down, i had the same problem with mine, i had to fix it because im trying to sell my 2001 honda cr80r
Be careful when makihg jetting changes one size at a time and read the plug. also what is your premix ratio and what oil are you using do i need to tell you its the main jet were dealing with. Carry some extra jets with you and dont be afraid to get your hands dirty so to speak
Your problem.
Your going to need to jet out the carborator, and maybe turn the idol down, i had the same problem with mine, i had to fix it because im trying to sell my 2001 honda cr80r
i have a yz 125 1999 that
i have a yz 125 1999 that burned up plugs but i fixed mine by because there was a recall on my bike
To fix it you hve to re jet your carberator
call a dealer and they'll tell you how
yes
both thesae answeres are right you may need to clean the carb rejett it and your floats may have a problem
YZ jetting
Be careful when makihg jetting changes one size at a time and read the plug. also what is your premix ratio and what oil are you using do i need to tell you its the main jet were dealing with. Carry some extra jets with you and dont be afraid to get your hands dirty so to speak