cool haed leaking??

[plummer1111]

my prodesign cool head is leaking around the studs. can someone tell me if there is suppose to be more than the two o rings that are by the spark plug,
thanks in advance

[hollywood250r]

You should have copper crush washers between the head and nuts to seal.

[440exking]

does the cool head ad alot of power.

[koh0001]

No, it helps keep the motor alittle cooler.

[Tom TRX250R]

The two advantages of a Cool head are that it has larger water jackets in the head that allow it to cool better and also has adjustable domes that can change the compression. It will increase the power if you raise the compression but remember that you might have to run race gas depending on your compression. Do a compression test after you put the head on to make sure.