Recently I replaced my throttle cable and clutch cable. The shee decided it wants to rev to the moon when it's supposed to be idling. I noticed a bit of oil buildup near the exhaust ports. So I decided to replace the o-rings and bottom cylinder gaskets. But it's still over revving. Is there a possibility that it's sucking in air in the head gasket even though it looks ok (no oil spitting out)? I don't know what else it can be. I've tried adjusting the idle screws on the carbs and I get the same result. Any help would be appreciated.