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I have a rancher 350 that I'd like to get a foreman 400 or 450 motor in. Or maybe even a 420, I am willing to do modifications to the frame if needed but I'd prefer a streight bolt up. Thanks

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none of those motors will be a straight bolt in. just changing the motor alone, won't solve your problem, you would have to change out everything for anything other than a 350 motor ?, as every wire harness, ecu,c.d.i. meter display, all of it..wont just all go together like you want ?. your best bet ?, just find a trx400,trx450, or trx420..and go from there.
 

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Ohh ok thanks man lol do you know who can build me a gear reduction?

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no clue bro ?, I leave my atvs stock :). you can look on ebay maybe ??.
 

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Nice riding up there?

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it's ok, I ride mostly over at my cabin area. most places around here are slim to none, you would have to drive a good ways to get some nice areas.
 

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Going to be a biggggg job. But there has been quite a few 400/450 motors swapped over the years. Don't know what's all involved, but would be a chore for sure.

There is a few guys on FB that do GR's. Can't remember all the names, hate to leave someone out. I would suggest just going on the Rancher Club, or Foreman Club etc. and asking there or doing a search on the group page.
 

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Don Oglesby does gear reductions. He's on bookface.

I agree, if you're trying to swap motors, better off just selling your 350 and buying a 400/450/420. Getting the motor in place is the easy part. Getting everything else (wiring, driveshafts) to work is gonna be a LOT of work.
 
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