rm 80

[dustin075]

I bought a rm 80 for $40, top end was gone. So i went ahead a bored it over 30 put a full fmf pipe on it and shaved the head down. when up two jets on the low and high. Started it up for the frist time yesturday and rode it. the bike has no top end what so ever. i tried going back to the stock main jet to see if the was the prob. but nothing. Any info would be great thanks.

[honda250r]

no top end power?

[dustin075]

yeah there is nothing. i mix the gas kinda rich 8oz to a gallon of gas (110)

[honda250r]

holy shit that is runnin it way way way to rich. 32:1 is only 4oz per gallon so only put 4oz of oil in every gallon of gas

[lt250racer]

Mix at 40 : 1 using quality oil. Did you use new gaskets? Almost sounds like an air leak, you should do a leak test, also see how much compression you have.

[dustin075]

Yes i use a new gasket set. A few people were telling me to advance the timing. I didnt mess with that though.

[FPMXer]

Did you use a flat top piston or a domed piston? How much did you shave off the head?

[dustin075]

I used a flat top and for the mill it was brought down so the dome lip is gone. (about the thickest of a penny) Could have mixing the gas too high been the cause?

[FPMXer]

Yes running too much oil then.