The main drivetrain bearing is mounted to the central frame casting on a pair of machined aluminum blocks. This bearing had to be perfectly aligned to ensure that the secondary shaft was perfectly parallel to the engine's crankshaft. Additionally, the bearing must be strong enough to support the full force of the engine's power while transmitting to the rear wheel.
I made the bearing blocks out of 6061 aircraft aluminum and assembled the parts using automotive suspension-grade flanged bolts and nuts.
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