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Discussion Starter · #1 ·
I am needing to bore my cylinder probally .040 and as i was looking at pistons
Stock is 8.5:1 and i seen a 9.5:1 and a 10.5:1.
has anyone ever had any problems going 9.5:1? i hear that 10.5:1 is very hard on the engine and i would like the extra HP!! but i want it to be a rider and not a work-on every weekend thing,i wouldnt mind a bi-yearly rebuild.

thanks
scott

2004 Honda Foreman 450ES
 
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