this is a for sale thread not an argument or a technical help thread. i personaly didnt use this on a zvh i prefer the full zetec as you cant gain the torque as easy fom a cvh head. here goes the technical help you need 145-150mm head bolts to get at least 17mm of thread engagement. this is the usual engagement a cvh head bolt has when mated to a cvh bottom end. hope this helps