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2001 Indy 500 Modifications, looking for some tech help

This is a discussion on 2001 Indy 500 Modifications, looking for some tech help within the Polaris forums, part of the Brand Specific Snowmobile Discussion category; Okay, so i have my measurements, but ran into another problem. My indy has mechanical reverse. I am starting to think that this might have ...

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Thread: 2001 Indy 500 Modifications, looking for some tech help

  1. #11
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    Okay, so i have my measurements, but ran into another problem. My indy has mechanical reverse. I am starting to think that this might have been an aftermarket option. The bottom gear is completely different, has a roller bearing center. The 42 tooth gear that I bought wont fit. I havent been able to find any other options to replace the lower gear with the roller bearing inside. If anyone knows of a manufacturer let me know. At this point, I have a couple of options, I can use the 19 tooth top and the 40 tooth bottom, and get a 2.1 ratio, but my calculator tells me thats 72.2 chain links. Cant find a 73 link chain, would a 72 stretch that far? Could use an 18 top and get the ratio I want, and the chain length under 72, but I have heard to stay away from going that small on the top as it will bind the chain. I cant imagine with my little 488 I would be in danger of breaking anything. Or i can just rip the reverse out and use the gears I want. Also not a good option. Any advice?

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    Gearing down with Reverse - Is it possible ? - HCS Snowmobile Forums

    Looks like there are 39-40-41 tooth bottom gears available from polaris....not sure if that helps you at all.
    Polaris...it IS the way out!

  3. #13
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    Thanks for that White, I tried searching for that online, but I was calling it the wrong thing I think. Ill look into it.

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