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So I have a 1999 Polaris Indy Sport that I want to turn into a "mod" sled. I have a part sled that is a 1997 Yamaha with the 700cc triple and its got triple SPL pipes. I would like to throw the engine from the Yamaha into the Polaris and then do a couple of things of course. Are there any tips or comments on this build? Just wanted to see what other people were thinking about this whole idea. Thanks!
 

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Going from an air-cooled engine to a liquid cooled engine is a very challenging thing to do. How to do the cooling will be pretty critical for a successful transplant. You also may not have enough real estate for the triple pipes under the 440 hood. You will have issues with motor mounts, it will be pretty important to get the engine planted exactly where it needs to be to get the primary and secondary properly aligned.
 
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