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Discussion Starter · #1 ·
I have a bit of a problem and I was hoping someone could help.

I have a '05 YFZ 450 with a Trinity 500 cc jug and piston, a set of hot cams, Trinity stage 4 exhaust, and a K&N intake.

Just recently the quad began to slowly lose coolant out of the catch tank at a rate of half the radiator every two or so hours. The machine doesn't appear to be over heating as I can hold either coolant hose in my hand. I have change the radiator cap thinging the spring was weak and not holding pressure but that did not help.
Is it a blown head gasket? There is no residual pressure in the radiator once the machine is cooled down and I cant find any sign of coolant in the crank case or exhaust.
Any help would be appreciated.
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