xr100 blue smoke

[Red_Dawn]

hi can someone tell me what might cause blue smoke soon as i start my 89 xr100.when i get on the gas it gets worse never clears up.i looked at the ring and pistons and i cant see no oil on the rings or on the sides of the piston.do you think its caused by valve seals? thanks for your help

[4strokeridertt]

Did you put some of your buddies mixed fuel in your tank?

[Red_Dawn]

whatever that means no its straight gas

[Yamadirt 426]

is it a new top end ? old top end? just start doing it? always did it? New to you bike ? history my friend.

[Red_Dawn]

here is the thing that happened.when i got the bike like 1 month ago it had a tapping in the topend.so i adjusted the valves and that took out some of the noise but not all.i then tore the top end off to look at the valves and piston and i found some carbon build up on the intake valve so i cleaned it off and that stopped the topend noise.after i put it back together it now smokes worse then ever.i have not readjusted the valves since i cleaned off the valve.and yes it did smoke a little bit when i got it but nothing like it does now.

[ccman60]

Try re-lapping the valves in. That may cure the problem.

[CEEZ]

If it is an older bike, relap the valves, and change the valve seal(s).

[robinsondb22]

blue fuel?

[Red_Dawn]

i have new valve guide seals. when you say relap the valves what do you mean?

i,m new at this so all help will be greatly appreciated

[scooterpimp]

i have new valve guide seals. when you say relap the valves what do you mean?

i,m new at this so all help will be greatly appreciated

Lapping Valves / Grinding Using Compund To Seat Valves To Thier Seats. & Make Sure Lapping Compound Is Propery Cleaned Off Before Assembly , Or Youll Have 20 Years Of Wear In 2 Minutes.