Why Won't My Bike Move Despite Smooth Gear Functioning?
When your bike stalls or does not move despite a smooth gear change and the engine accelerating, consider these potential causes:
Common Issues and Solutions
1. Clutch Disengagement
Ensure your left hand is not holding the clutch lever against the handlebar. If this is the case, rapid release followed by engaging the gear should help. This might seem humorous, but it often resolves the issue.
2. Side Stand Cut-off Switch Issues
Another common reason is a side stand cut-off switch that is stuck. This mechanism prevents the motorcycle from moving with the stand down to avoid accidents. When the side stand is raised, the switch pin should disengage, allowing the bike to move when the clutch is released.
Inspect your switch for dirt or damage. A stuck switch can often be cleaned and lubricated to function properly, while a bent switch will likely need replacement.
3. Drive Axle Key Issues (From the Tale)
As a personal anecdote, during the summer of 1964, my 1957/58 Red Lambretta 125cc experienced a similar issue where the rear wheel did not move despite all other functions working well.
Upon inspection, the problem turned out to be a 'woodruff' key in the drive axle keyway. This key had either broken or become loose, causing the rear wheel hub to grind and become inoperable. The mechanic retrieved a rear wheel from a wrecked scooter and replaced the drive axle, all for a mere $36—a significant expense at the time.
Conclusion and Additional Tips
In summary, if your bike is not moving despite smooth gear changes, carefully check the following:
Ensure the clutch lever is not engaged. Check the side stand cut-off switch. Inspect the drive axle key and wheel.These issues can often be resolved with simple adjustments or minor repairs. However, for more complex problems, professional assistance may be necessary.