box stock main jet

Next ? Is the oil coming out black? We had a series were I'm at called socks. Southern ohio clone kating series well we run same setup as you guys except we was aloud a 30 jet. But when ours got that hot the oil was black and the rod was wiped out. At the time I was using Thor light red. Switched to cool power medium green never had a problem after that. Others didn't have a problem running light but I did might check that out
 
do you have it taped up??? and I have found if you take off the back ten your head temp can go down too...

this is not my engine, it is Thomas James (TJ's) engine, which used to belong to me though. No tape on the engine at all.

Jeff im unsure if the oil is coming out black or not, he will have to answer that one since i havent seen the oil recently. He bought a kart from us and the engine was already on it
 
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