This is the jackshaft where the human power and engine power are combined. The two outer sprockets are welded together and welded to the shaft. The inner sprocket is screwed to a freewheel--this sprocket is driven from the engine, the freewheel allows the bike to be pedaled with the engine stopped. The middle sprocket is driven by human power. The outer sprocket sends both power sources to the rear wheel.
I used a BMX style freewheel which is very noisy. The whole assembly is kinda heavy. So eventually I would like to improve this part. Are there other types of freewheels that are not so noisy. I intend to ride with the motor off a lot and this noise will start to wear on my nerves.
A Sturmey-Archer 3-speed hub is used as a mid drive to help route the chain under the engine and to provides 3 pedaling speeds.
I used a BMX style freewheel which is very noisy. The whole assembly is kinda heavy. So eventually I would like to improve this part. Are there other types of freewheels that are not so noisy. I intend to ride with the motor off a lot and this noise will start to wear on my nerves.
A Sturmey-Archer 3-speed hub is used as a mid drive to help route the chain under the engine and to provides 3 pedaling speeds.