MXZX Race Sleds
Does anyone know, what the Combustion Chamber CC is, of the std. 670, and the 670HO head?
I also need the CC of the 583, & 617 head if you know it also.
Is there a formula, to find out what your compression ratio really is?
Rotax, reccomends 92 Octane in all their Ultralight engines, 377UL...