Fabricate and Install Drive System
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GMC’s first ever bicycle. #stihl
What happens here
This step involves modifying the rear wheel to accept a large drive sprocket. The video shows 'weld marks' around the sprocket, suggesting it was custom-welded to the wheel's hub or spokes for a direct drive. An output shaft from the engine, possibly a modified part from the weed whacker's original drive, needs to be fitted with a smaller drive sprocket. A robust, heavy-duty drive chain is then routed and connected between the engine's drive sprocket and the rear wheel's large sprocket. Proper chain tension and precise alignment are critical to prevent derailment and ensure efficient power transfer.
Goal: Transfer power from the engine to the rear wheel of the bicycle.
Tools and materials
- Chain Breaker Tool — To adjust the length of the drive chain
- Drive Chain — Connects the two sprockets
- Large Drive Sprocket — Attached to the rear wheel to receive engine power
- Rear Bicycle Wheel — The wheel to be motorized
- Small Drive Sprocket — Attached to the engine's output shaft
- Welder — To permanently attach the large sprocket to the wheel
- Wrenches — Tightening bolts for sprocket adapters or chain tensioners
- Chain Lube — Lubricating the drive chain for smooth operation and longevity