Find the best-power RPM for the motor from the manufacturer's graph. The motor bracket is mainly supported by a bolt thru the caliper-brake hole in the fork. It is U-bolted to the fork blades. The engine is bolted to the motor bracket. All bolts are Allen-head, hardened.
All nuts are nylon locking.
The motor is mounted low to avoid interference with the shifting and brake cables. There is no front brake. The engine has an integral centrifugal clutch. The throttle control is on the left in place of the front brake. There is a hold-open catch for when starting the engine that is open enough to start, but not so open that the centrifugal clutch engages.