Any one running a high compression piston?

[bxtreme4life]

I have a 2009 CRF 450 with a LT kit under it bike worked great last season, but it's time for a rebuild so I was thinking about running a 13.5:1 piston. Just curious if anyone has done this and what your thoughts were. Riding altitude is from 5000ft-10,000ft.

 

[J&L Snowhawk]

Ye

I just installed the high comp piston in my rmz last weekend. Run premium gas at altitude and should be good.
I put on my dobeck fuel controller cuz I had one to try out too.

 

[Hbmtr]

07 crf 488 with a cp 13.5 -1 piston running premium at sea level no det. you probaly get away with a 14 -1 piston at altitude with a mix of race gas and pump fuel.highly rec the CP pistons

 

[Draxxus]

Con rod to crank bearing is a weak point , make that part of your rebuild


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[Hbmtr]

Con rod to crank bearing is a weak point , make that part of your rebuild


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Agree on the rod and crank.Carrilo makes a great rod,send off to crank works for a rebuild and balance.Also ck Falicon rods i believe