I will be changing the oil this weekend on my 99' zx7r. The filter thats on there now is a purolator car filter that cross references to a honda civic I think. Threads and all match, but what about the valve in the filter? Same psi? Could this have hurt my bike? Old owner states he got the info and part number from a kawi forum. Can anyone tell me if this sounds right? Removing it and installing a k&n oil filter and amsoil 10w40 syn motorcycle oil this weekend.