The same Bollens Husky but recently installed a 750 cc Yamaha 3 cyl. motorcycle engine.
Has been mounted backward to allow proper rotation of motorcycle 5 spd transmission to match up with rotation of tractor
hydro transmission with the use of a 1 inch jack shaft and #40 "roller chain".
System has spring loaded idler sprockets. The red handle lever on the dash is a hand clutch for motorcycle trannny.
All that has to be done is selct a gear , let go of the clutch handle, then throttle up and push right side Hydro Shuttle
Pedal.
I have had the engine to 8,000 RPM. But DO NOT run hydro speed more than 4,500 RPM Which
seems to perform the best.
Here a re a few more angles to look at
I hope you enjoy this tractor. It's alot of fun.