Its not like the system have 2,8l up in the tank all the time. Drain all the system, front plug and crank, then see how much oil you have. And remember to idle the engine before you kill it, then check if its full up in the tank, i said it before these systems can fool you any time about oil amount. I drain system, change filter and refill 2,8l and thats it, if you check system after filling 2,8l it seems like its not enough. Take a ride and check again its full when hot.

When i rebuild the engine,also i change the oring of cylinder(no 2). I bought one from local dealer,not OEM and I'm not sure if this fits ok there. Maybe it's something wrong here..



Yamaha Motorcycle Parts 1986 XT600SC CYLINDER Diagram

No dont worry about the O ring with smoke problem.

it's voodoo man...

It's your valve seal(s) . Actually common to have one damaged if not lubed or ends of stems not polished to get rid of any burr when sliding on new ones . They need to be slid on and seated very carefully.

what do you recommend?new valve seals?

dani, do the simple (and cheap) part first so you solve the oil drain issue. then with that solved you can see if you still have the problem before dropping the motor.

see here

Yamaha Motorcycle Parts 1986 XT600SC OIL PUMP Diagram

order parts 22,23,24, 10$ total and fit them. still have the problem? then as many tell you, it could likely be valve seals. but at least you solved another problem you have anyway to solve, 1.2L after a few hours = not good.
troubleshooting often works like this... solve one problem, then move to the next.

It doesnt tell us anything, only way to know is if he drain all and tell us how much in total. Then we need to know if the measure stick is on full when he drain crank, otherwise you never know where oil in the system are at the time. I always drain alot of oil from crank after bike is warmed up, still there is nothing wrong with the valve.

I just can't believe there is still some worry over that stupid check valve . WoW. This site is the worst I've ever attempted to help on !!!


FIX THE VALVE SEALS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Please ????



Pretty please ??? with a cherry on top ???

But are new!! :))

Ya, unfortunately , doesn't always work out so good , they are really easy to rip or even nick .

Not yelling/ screaming at you .

This thread has become a notch in record...

Thanks guys for answers! bierbier

A more importan question for us to know, what mileage did engine have before rebuild and why did you deside to do this?

I have almoust 85000 miles and a terrible sound at cylinder. The cylinder was worn so i decided to do a rebuild,new quota.