Methods for Stabilizing the Gearbox of Small Engines

When we talk about common malfunctions of samll engines, they can cover the engine instability, difficult to start or not start, bad engine idling, overheating, automatic flameout, clutch failure, ineffective shift and motorcycle abnormal noise. Especially, the problem of engine instability. Small engines usually have space problems between the can motor drive shaft and the gearbox drive shaft, therefore, it is very essential to fasten the two drive shafts together and still maintain stability of the gearbox.

The drawbacks

The skilled worker offers the methods of using neoprene tubing to act as a drive mechanism and to stabilize the gearbox; another is a U-Joint and couplings, however, this method requires a means to stabilize the gearbox.

Tubing that is available today is far more stable and holds its elasticity far longer than the original tubing. On the other hand, U-Joints and couplings work similar to the drive shaft on an automobile. The drawback is when the shaft begins to turn a monetary torque de-stabilization disruption of the rotation of the driveshaft may inhibit the gearbox from operating. The coupling can slip out of its hold due to the torque and the desire of the gearbox to ride up or spins on the main gear.

The methods

So the key for the problem caused by the rotation of the driveshaft is to find a means to hold the shaft connection steady. One way is to build a bracket with a bearing to be attached to the frame of the motorcycle. The shaft of the Can Motor is then inserted into the bearing and the bracket is attached to the frame. Once this is done, the U-Joints and couplings are placed on the Can Motor shaft and the two interfaces, Can Motor shaft and gearbox shaft, is coupled together.

With this method, you must have a means to adjust the couplings so they do not bind. This is usually done by drilling an oblong hole where attachment for the Can Motor was located. This allows the user to move the Can Motor backwards or forwards before tightening the fastener down. However, many times the space between the two shafts is so small the neoprene tubing method is the only means that will work.