Grimzella
04-25-2009, 10:33 AM
quick question here.. I recently upgraded my piston from stock to Wiseco no bore, standard size. everything seems ok.. runs normally.. but... when i am in an open field or maybe climbing a long hill... i notice that... if i am at 3/4 throttle or wide open... it sounds like my valves are tapping... does the wiseco piston have any effect on my vales or springs.. do i need better valves and springs now? thanks