1998 ZX7R camshaft installation
I'm having issues with my low speed running on my P3. Changed a ton of parts, messed with the carbs, did a valve adjustment. Then for the hell of it, I checked the compression. I got 80 psi on all cylinders. Then I did a leak down test. It was leaking out the intake valves.
Put the crankshaft at the TDC mark 1,4. Used a long screw driver in the spark plug hole to make sure #1 cylinder was at TDC. At that position, the intake valve is pushed in slightly causing the leak. Took the valve cover off and counted the pins on the chain. It counted to 26 pins. The EX mark looks good to the top of the cylnder head, but the IN mark looked a bit high. Kind of a bitch to see the marks on the frame side, but used the marks on the opposite side of sprocket. Then for the hell of it I moved the camshaft to 27 pins by rotating the intake camshaft counterclockwise 1 tooth. I rotated the crankshaft by hand to make sure it wasn't hitting anything and i was good. But the intake valve is still being depressed slightly at TDC. I think this is causing my low compression and poor low speed running.
It seems like where the IN mark is located on the intake camshaft, it will depress the intake valves. Could I have a bad camshaft? I'm pretty sure the valve clearances are correct. Any ideas on how to install these cams correctly? Do I need a degree wheel?
Last edited by ant21; 03-21-2011 at 12:51 PM.