SuperMoto Junkie banner

1 - 6 of 6 Posts

·
Registered
Joined
·
1,365 Posts
The manual for my CRF150R says to replace piston, rings and pin about every 15 hours.
I use it for supermoto, not mx.
15 hours seems awfully soon, but would like input from those of you who know more than I do.
Also, when I do it, would it be a problem going to a little higher compression piston? If not, which one do you recommend?
Thanks much for the help!
 

·
Registered
Joined
·
1,403 Posts
The manual for my CRF150R says to replace piston, rings and pin about every 15 hours.
I use it for supermoto, not mx.
15 hours seems awfully soon, but would like input from those of you who know more than I do.
Also, when I do it, would it be a problem going to a little higher compression piston? If not, which one do you recommend?
Thanks much for the help!
15 hours:rolleyes:

Are you bouncing it off the rev limiter into turns and cruising at 10,000 RPM's?

I suppose for racing thats resonable...but man 15 hours:infrandom
 

·
Registered
Joined
·
31 Posts
The manual for my CRF150R says to replace piston, rings and pin about every 15 hours.
I use it for supermoto, not mx.
15 hours seems awfully soon, but would like input from those of you who know more than I do.
Also, when I do it, would it be a problem going to a little higher compression piston? If not, which one do you recommend?
Thanks much for the help!
That's a joke. 15 hours. Just keep the valves checked and keep an eye on oil consumption. If it starts blowing blue, put a piston and rings in it. If the vavles start to zero out consistently, it needs a new valve train. Some people over-think it and worry too much. The bike will tell you what it needs long before it goes kaboom.

Also, a higher compression piston should not be a problem. I don't know specifically on the 150, but a 250 seems to take one fine running on pump gas. - no pre-detonation.
 

·
Registered
Joined
·
6,362 Posts
X2 mines was a hi-comp piston too. runs fine on super but really loves some 100 octane
That's a joke. 15 hours. Just keep the valves checked and keep an eye on oil consumption. If it starts blowing blue, put a piston and rings in it. If the vavles start to zero out consistently, it needs a new valve train. Some people over-think it and worry too much. The bike will tell you what it needs long before it goes kaboom.

Also, a higher compression piston should not be a problem. I don't know specifically on the 150, but a 250 seems to take one fine running on pump gas. - no pre-detonation.
 
1 - 6 of 6 Posts
Top