Mod Cr85b

[ecy063]

My son races his 2003 cr85b at the local mx track. The bike is all stock except for the suspension. He has asked me to install an aftermarket reed valve for a wider power band. I am considering the V-force 3. Does anyone know if I will have to rejet. Richer or leaner? Any other easy mods?

 

[alligatorbling]

usualy with a performance reed cage you want to go 2 or 3 sizes leaner on the main jet... this is true with 250s.... more than likely it will have instructions with the reeds. when i put in my boysen rad, it told me how to rejet.