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Discussion Starter #1
I'm thinking of building a custom sled and was wondering if anyone has experience in swapping a Ski Doo 670 engine into an older polaris chassis?

Any information would be greatly appreciated.
 

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You will have to make some custom motor mounts, other than that everything should go smoothly. Might have to change the pipe and stuff around a bit to get it to fit right.
 

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Just make sure the chassis that you put that 670 in has enough heat exchamgers to cool it.
Indy 400 or 500 would not have enough I would suspect.
 
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