What bore kit

[Extremerider]

What bore kit is out for the Z that u can use pump gas? Thanx

[BlueZ440]

I don't think is the bore kit...I think is the piston you choose..But I'm not sure..I'm retarded..;)

[ramp rida 55]

if you have a kit with a 12:1 piston you can run pump if your carb is jwtted properly. i run a 13.5:1 and i have to use a 50/50 mix of race and pump. many kits give you the option of which compression you want

[SHOCKER]

je is the only good piston i found that is 12:1, im doing my motor now

i hav the je high comp 12:1 94mm piston, and im getting my cylinder bored to 434 to fit the piston and am getting it nikasiled, ill give you guys a review in 3 weeks when i ride it next, i should have hte cyldiner back next week

[Jersey450R]

My buddy has the Toshi 450 kit on his Z with a 13:1 piston and he keeps up with us all day long. His quad rips!

[SHOCKER]

yeah but you have to run race gas with a 13:1