rm250

[ossagp1]

No, having it off or having the throttle held open is the correct way. It sounds like you are right on needing a new upper end at least. I would disassemble and check the lower end while you are in there. Have you found a manual for it yet? that is as important for you as the parts are right now.

Lots of people can talk you through the rebuild though.

good luck

[R.S.Rider]

hey i got some new info...my grandpa who has been riding/working on bikes since the 60's tells me that my low compression may be caused by my fuel problem. he says the gas will remove the oil from the rings and lower my compression. he says when the carb is fixed the bike should run. i hope thats all it needs cuz its not easy to get money out of my dad for parts.

[Woody_393]

maybe, maybe not. You'll just have to see.

[R.S.Rider]

hey well i had ordered the carb rebuild kit and when i got it i realized that the carb that is on there currently is not stock. so i took the carb down to the shop and the guy there was a huge help...he checked everyhing out for me and said the carb is all in pretty good shape and thats not my problem. he suspects that it is the key in the flywheel. so i took it all apart and the key is fine....whats next?

[Pretendo]

i dont belive that is correct about the fuel problem leading to 70 psi... i could see it droping the psi by 5 or mayyybe 10 in an extreme situation and worn out rings that didnt seat well, but honestly, i hope the cylinder isnt gouged. the rings have a certaint spring tension. do the top end.

[Pretendo]

the jetting doesnt change the fuel to oil mixture, it changes the fuel to air mixture. mix at 32 : 1 untill uve got it running right, then u can run 40 : 1