At full throttle with no chain on it, the governor will pull the throttle back, causing a sound that sounds like it is surging.
Put it on the ground, hook it up and let us know if it still surges.
If outer tube is 1 in. OD, and inner tube is 7/8 OD, there does not seem to be enough room for a bronze bushing.
Cut a Clorox bottle or a milk jug is what yours truly would do.
Just an observation...and maybe you already thought about it, but that small pipe near the studs is probably a vent to atmosphere. It would be on the TOP of the case, not the bottom where the oil is. SO...it would appear the gearbox mounted under some kind of frame.
Do you have any guesses about...
ARC website says that wheel has 32 degrees of timing advance.
I think the original timing was 24 degrees.
Have you changed anything else, or is it all stock? (Camshaft especially?)
Did it run immediately before you installed the flywheel? What I am asking is, did you do any other modifications at the same time?
Is your flywheel key installed and flywheel torqued?
My guess based on what you have already posted is that you have a timing problem.
I have not tried this with a fork, but with old boat motors, there is a driveshaft that goes from the lower unit up into the bottom of the vertical crankshaft. They pump salt water up to cool the engine, and that driveshaft stays wet whenever it is running. If we couldn't get it apart after we...
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