hello hope someone can help..Im in need of a combo and chain SILENT chain&gears Combos as 17/33 used in the phazer st/longtrack or mountain sleds..Also looking for a 18/35 or if it fits 19/37?/ really need some help to get my oval racer on the track with these ..or others that can fit in the stock chaincase of a 95-96 phazerII Please if you know what fits and what chains are needed please reply or call 715-746-2662 thanks chip We did check out the gearing chart but most years do not list the chain length..Okay does the bottom silent gears can be used from cat or polaris?? Thanks again chip