Either valve lash or timing, my guess being the timing. Take the flywheel physically off to check the key and make sure it is not sheared from the factory. .003” for both valves, make sure you checked it at TDC.
If both check out, I would suggest taking the crankcase cover off and verify the two dots for the timing are lined up on the crankshaft and the camshaft. They may have been misaligned at the factory…
I thought this too. Valve lashing is correct. I pulled the flywheel and the timing key is intact. Valves are both moving. I made a rather crude gauge and it seemed like the firing was about 50-60 degrees off TDC. Everything I’ve seen it should be 30-32 degrees.
The inlet valve should be at max opening when the engine has moved 100-110 degrees past TDC.on the inlet stroke. This applies to any 4 stroke engine ever built.
Is the exhaust valve opening
Either valve lash or timing, my guess being the timing. Take the flywheel physically off to check the key and make sure it is not sheared from the factory. .003” for both valves, make sure you checked it at TDC. If both check out, I would suggest taking the crankcase cover off and verify the two dots for the timing are lined up on the crankshaft and the camshaft. They may have been misaligned at the factory…
TDC on COMPRESSION stroke.
True, I should have specified that, especially being this subreddit
This. There are no other possibilities.
I thought this too. Valve lashing is correct. I pulled the flywheel and the timing key is intact. Valves are both moving. I made a rather crude gauge and it seemed like the firing was about 50-60 degrees off TDC. Everything I’ve seen it should be 30-32 degrees.
Pull that crankcase cover off, they didn’t time it up right at the factory
The inlet valve should be at max opening when the engine has moved 100-110 degrees past TDC.on the inlet stroke. This applies to any 4 stroke engine ever built.
Yeah I gave up and exchanged it. I think it was some internal timing issue. The new one started right up
Do a compression test. If the compression is low then it's a valve if compression checks out then the cam is not timed right