DIFFERENT SYSTEMS AND TERMS USED

CLUTCH DRIVE SYSTEM

A clutch driven system is the safest and most practical choice. It converts a bike to an automatic driven system much like a moped, there is nothing to engage or disengage. You pull start the engine with a pull cord, get on the bike and apply the throttle to accelerate or decelerate to achieve a desired speed. 

A centrifugal clutch allows an engine to stay idle and not move while you are stopped at a light. The advantage of having a clutch driven system is that it automates your bike.

HOW DOES IT WORK?

The engines’ clutch is equipped with two metal shoes tied to each other with a set of springs, for the purpose of expansion and retraction. 

When the engine is given gas, the motor reeves, reaches a certain R.P.M which forces the clutch shoes to expand and lock onto the drive roller propelling the tire. 


GRADES OF CLUTCHES 

MAINTENANCE OF A CLUTCH 

The maintenance of a clutch driven system is relatively easy and unlike most people think, the entire clutch need not be replaced, just the replacement of a set of springs when they wear out. 

The replacement of the springs is simple and inexpensive. Springs are available at all lawn mower shops or hardware stores.

Springs
	1000179	216767S

WHAT IS THE MYSTERY BEHIND STARTING A DIRECT DRIVE MOTOR BY PEDALING?

A motor can be started from its drive shaft by spinning the drive shaft instead of pull starting it with a pull chord.

Here is how the sequence works:

When the tire spins, it forces the drive roller, which is attached to the engine shaft, to turn, forcing the piston to rise and drop. This causes the suction of fuel from the carburetor into the cylinder, where compression of the fuel occurs. The spinning of the flywheel causes static electricity to pass through the coil wire and into the spark plug creating a spark in the cylinder. This spark ignites the compressed gas in the cylinder and combustion occurs. 

TYPES OF DRIVE ROLLERS

Rubber / Plastic	Polypropylene / Carbon Fiber	Stone Wheel

Polypropylene, Carbon Fiber and Stone Wheel (Wet weather wheel)

All of the above are used on direct drive system because they’re inexpensive and offer good traction for their value; however, they chew up most tires within a short time, leading to the continuous replacement of tires and drive rollers.