Barn of Parts Sled Salvage LLC

The 14-16 Viper and ZR 7000 use a wobble bearing as the upper chaincase bearing which has been more prone to failures compared to a conventional fixed race bearing. Starting in 2017 the case and jackshaft were changed to incorporate a fixed race bearing.  Until now updating the 14-15 models years required purchase of updated inner case and jackshaft.  A new jackshaft alone lists for around $370 currently. 

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On 14-15 models the jackshaft has a smaller OD, so we have a collar that presses into the fixed race bearing that allows it to fit the 14-15 jackshaft. A small aluminum spacer gets installed between the bearing and the shoulder on jackshaft to maintain correct spacing. Beings that the new bearing is thinner than the wobble bearing, a shim ring is installed between the bearing and snap ring to lock bearing into the case. 

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In 16 the jackshaft OD was increased to 30mm and the threaded locking collar was omitted, but the bearing was still a wobble style. To update the 16 model to a fixed race bearing the shim ring is needed and (2) shim washers.

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The 2014-2015 kits will retail for $110. The 2016 kits will retail for $60. A quality Japan made bearing is supplied in both kits.