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DJ530

American Sportworks 650 2wd engine swap, to Predator 670

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A few pictures (so far) of the engine work - eventually I will share wiring info and other details (if anyone is interested?)  should anyone else ever need to swap an engine in one of these. The replacement engine is a Harbor freight $750 special 670cc,  (lawn mower/industrial type lump) with a few minor upgrades. Should have it back together soon, bolted in. The cold weather slows me down! 

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Thanks Travis!   No, this new motor hasn't been fired, lubed everything up well, greased the cam lobes, checked the bearing clearances, will delete the governor arm and mechanism and button it up.  Couple more pics. 

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Getting it back together.  Engine final mockup and assembly done.  Needed to bump the engine to the passenger side about 1/2" to line the CVT up inline with the original location on the old engine.  The 670 has a longer crank snout where the pulley seats. Just waiting on some parts for the carb (this setup uses a 1.5mm needle and seat for use with a pulse pump), and the moto carb to stock throttle arm cable,- should be here tomorrow - and we are ready to fire. Starter cranks, all wired up. I only ended up with a kill wire for now,  (blue wire from UTV, black/red wire on the motor) , and the starter (white wire ), along with the fused hot wires.  Will hook up the oil sending unit from the old engine so I have the oil light. 

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She's a runner!  Waiting on some special tools to get here as I have some tuning to do on the clutch. Clutch stalls the motor a bit high, so I have a feeling it's all caked with mud in the clutch sliders.  Runs good though! 

 

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