Hey guys, I dont post on here much, but i figured if this has been a problem, you guys on here would know. I have had my 450 for going on 5 months now, and it seems the rod is already knocking. It's completely stock except for a carb mod and suspension. I run a gallon of race gas for ever 4 gallons of 93. I race it in the 450 Int. class, but I've never heard of a bike having rod knocking problems this soon. anyone know if this is common?