Oil leak

On my WR450 I did top end. head done by CRFs only, new piston pin and rings bike was running good for 180 miles no leak

yesturday wile riding the Ride for Kids out of Glen Helen riding cleghorn side trails had to twist my throttle to rev the engine for more power thats when obove certain RPM under pump pressure oil squirt out by were water hose connects to the head What could I have done wrong on my torcking? follow the manual to the best of my ability.

You probably did not clean the surfaces enough before installing the new gaskets.

You probably did not clean the surfaces enough before installing the new gaskets.

You probably did not clean the surfaces enough before installing the new gaskets.

thanks for reply I will install new gasket and check for dirt and warpnes retorck

You had the work done by CRFs only. lol. They don't know how to work on WRs.  Sorry couldn't resist. 

You had the work done by CRFs only. lol. They don't know how to work on WRs.  Sorry couldn't resist.

You are right Next time I would go to a Yamaha expert.

On my WR450 I did top end. head done by CRFs only, new piston pin and rings bike was running good for 180 miles no leak

yesturday wile riding the Ride for Kids out of Glen Helen riding cleghorn side trails had to twist my throttle to rev the engine for more power thats when obove certain RPM under pump pressure oil squirt out by were water hose connects to the head What could I have done wrong on my torcking? follow the manual to the best of my ability.

As I started to do my tear down looking around I saw what I think the oil was coming from loose oil hose next to dip stick,replaced hose Added some oil and started it and so far leak stopped. Paco

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