hi, i own a 98 yz 125 and when i start it and give it a little gas(in neutral) once it gets past 1/4 throttle position it boggs and puffs out alotta smoke, it doesnt sound like it should..it has a pro circuit pipe on it and i would think it would wine alot...i dont think its the rev limiter because i know what the rev limiter does and what it sounds like when it kicks in..help would be greatly appreciated thanks

the reeds maybe??

 

HAve you replaced the fuel/oil mix? If you are sure the ratio is good and the oil hasn't separated from the fuel then have you made any other changes since it last ran good? When did it last run come to that? If you want a quick diag, then could be the right crank seal has torn and the motor is sucking in tranny oil.[img]i/expressions/face-icon-small-sad.gif[/img]

 

i had it running the other day...it use to be a race bike and i bought it used, they ran it 50:50 and we are running it 32:50..

 

so, the crank seal is probably torn?

 

you probably mean they ran it 50:1 and 32:1. Mine does that all the time. Try changing the plug and it should clear up. You could have a fouled plug. With a 2-stroke you should always have a good supply of spark plugs on hand.





edit: had to fix the typos lol looked like my 8 year old typed it.

 

yeah thats what i meant by the ratio..(50:1) i changed the plug before i started it the other day, i suppose no1 races their bike in neutal..so i wont worry about it thanks for the input greatly appreciated

 

Not sure what you mean by 32/50. Correct ratio is 32 :1. That is 32 parts of premium octane fuel to 1 part Yamalube R.

If there's any doubt, junk the mix and start again.

 

yeah typo i meant 50:1

 

you shouldnt have any problems. Mine does it once in a while but always clears up and runs great.

 

maybe i just need to ride it ...or maybe run the mixture to 50:1..hey how much u want for your raptor?