Need help with 03 yz450

Runs for a short time then seems to hydro lock.. At tdc cam marks are in line.. What could this be?

Seems to be in time.. Hard to kick over.. Will start but won't run long.. Seems to hydro lock.


Valves are tight. 


This thang is gettin on my nerves!! I'm about to burn it!! Lol

Make sure cam covers aren't to tight. This binds the cams from spinning freely and makes it hard to kick.

Edited by greenhammer75

check your cam cap torque and oil pump before you start it again or it might cost you $800.

Connecting rod.  The cages crack in the rod bearing and they turn into a random roller clutch. 

Damnit!! Thanks for the help tho.. Seems like I'll be spending 1000 bucks....

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