Ok, after some reading, I think I am going to get the Harbor Freight 13HP engine and a 1" bore Comet 30 driver clutch, and use my existing driven pulley.
Problems will include, but not limited to, matching up my throttle cable, and removing the governor.
Since I will be gaining more than twice the power, I want to add taller gearing. Should I go bigger on the jackshaft sprocket, or smaller on the axle? Do they make bolt on sprockets, or will I need to fab a sprocket?
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