Hey guys! long time no talk. took a nice long brake from riding. think it got stail but, im back at er' once again! Built a wicked(at least to me) cr250 over the time i was out. still havent done any engine work to it(210 PSI on comp test) but everything els has been replaced. I also took a gamble with some china made rads. they look good..but they build up heat like nuts! So, my question is, would over heating make my bike ping? i know i have a leaking left crank seal( new one on the way) so that may have very well been the problem. im also in the proses of sending my OEM rads to get straitened to get these junky Chinese ones off the bike. But at the end of the day im still curious if the over heating made my bike knock. (i think yes)Ill get some pics up of the bike soon for you guys to check out.