Mike Rocket
Rocket 3
Not sure why most bike manufacturers don't undercut the gears to begin with. Here's a pic from an early 60's 305 Honda. Look at the amount of backcut on those gears from the factory.
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Maybe it's the cheaper option they take. With the amount of Rockets on the road by comparison it may be a small number that have most of the problems. As someone said this week on this thread we only hear about the faulty machines.