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My son has a '94 Indy Classic 500cc. Does any one know what size carbs are on this? Also He was interested in changing the helix to get better backshifting. Any suggestions? Thanks Rich
 

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Your sled should have Mikuni VM 38 mm cabs. It should also have a 34° Helix. I would try one of the compound helix's. 34-40 or a 34-42. Either one should give a quicker backshift without changine the primary clutch setup.
 

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put a new stock primary and secondary spring in for starters. springs fade over time. if it still has trouble than you need to try to find out if it is clutching or carbs.
 
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