Looking for some information and advice.
Have a 2006 DRZ400S with 10,600km on it. Just picked it up. It had been sitting since sometime in the fall, maybe September. It started and ran for a couple minutes.
Run down of what I've done: took the carb out and apart, wanted to give it a clean. Found the O-rings on the float needle seat, and the main jet holder were deteriorated. The rest of the carb seemed ok. Checked the oil dip stick, smelled like gas. Makes sense, carb must have been leaking gas into the motor. When I removed the carb, there was a puddle of gas in the engine intake.
I went to check the valves, got the valve cover off, then went to take off the caps so rotate the engine and line up the timing marks, and as soon as I started unscrewing it oil, or more like gas, started coming out. Got the oil pan under it, and cracked the case oil drain bolt... a mixture of gas and oil poured out, A LOT came out... I don't know how much volume is available in the engine, but the amount of gas/oil that came out filled the entire oil catch pan, must have been 4 or more litres. Not good...
I rotated the crank and lined up the timing marks, the cam lobes seemed to be in the correct location, the lines all made sense I think. I checked the valves:
I was able to rotate the engine with the spark plug still in... should I be able to rotate the crank with the spark plug still in? Does the auto decomp allow this, or is there an issue there?
The engine rotates, it isn't stuck or anything, however it seems that it gets a little stiff at the top of the stroke, and at some point makes a click.
Here is what I can see so far:
The cams appear to be in good condition to my untrained eye, thoughts?
Appears to be properly timed, 15 pins between teeth, little confused by the numbers on the cams, no idea what they mean. Also I'm assuming these are the stock cams, I don't think any work was done on this motor.
Looking down the intake at the intake valves. I also stuck my scope down the spark plug hole, but it was too big to get into the cylinder to see anything meaningful.
So, what to do next... do the cams look ok? What would the gas in the motor have possibly damaged or done? Could it have hydro locked the motor and blown something (hence turning over even with the plug on)? Best way to flush the system of the gas? Should I pull the head? I'm thinking yes just so I know whats going on in there... this would be the first real motor work I've done.
Just wanted to get some opinions. Thanks in advance!