Several have requested information on converting the Q-Matic to rear belt drive. I will gladly cover this topic for the few that want to use belts.
The Q-Matic is one of the few 4 stroke drive systems that can easily be converted to total belt drive.
We considered offering such a kit, however it isn't practical. Because of the various bicycle frames it would be next to impossible to put enough belts into a kit to fit, and the additional cost would run the majority of end users elsewhere.
Several Authorized EZ Motorbike dealers have installed the Q-Matic and or Silent Power drives with rear belt drive.
Here are the facts and the way to make it happen. First it is important to know the rear belt sheave from Whizzer USA [if available] will only fit wheels with the 12 guage [called .105" spokes] spokes and the wheel must have 36 spokes. The reason this is so has to do with the brackets that attach the sheave to the spokes. The brackets are too large for standard spokes, and will cut the larger [11 guage/ .120"] spokes and cause them to break. Memory Lane Classics in Ohio sells a vintage Whizzer repop sheave and will fit different size spokes, however it ain't cheap [$85.00 plus shipping for the SS version].
The Q-Matic uses the MaxTorque clutch with the 10 tooth #41 sprocket and is made as part of the clutch. It is possible to have a machine shop remove the teeth and make a special pulley to press fit the modified shaft [as I stated several have done so]. Max Torque makes a clutch with a pulley, however the pulley is too large and won't produce the required ratio. The Whizzer sheave is 15" and the Max Torque pulley clutch has a 3.2" drive pulley. Sadly the clutch is costly and the final ratio is 4.86 X 1 and needs to be 5.6 X 1 or greater for the Honda or HS 49 CC motors. If the output pulley is 2.5" then the final ratio is 6.31 X 1 and will work well.
I will include actual pictures of our test units to show we did the research for everyone that wanted to use rear belt drive.
Have fun,
The Q-Matic is one of the few 4 stroke drive systems that can easily be converted to total belt drive.
We considered offering such a kit, however it isn't practical. Because of the various bicycle frames it would be next to impossible to put enough belts into a kit to fit, and the additional cost would run the majority of end users elsewhere.
Several Authorized EZ Motorbike dealers have installed the Q-Matic and or Silent Power drives with rear belt drive.
Here are the facts and the way to make it happen. First it is important to know the rear belt sheave from Whizzer USA [if available] will only fit wheels with the 12 guage [called .105" spokes] spokes and the wheel must have 36 spokes. The reason this is so has to do with the brackets that attach the sheave to the spokes. The brackets are too large for standard spokes, and will cut the larger [11 guage/ .120"] spokes and cause them to break. Memory Lane Classics in Ohio sells a vintage Whizzer repop sheave and will fit different size spokes, however it ain't cheap [$85.00 plus shipping for the SS version].
The Q-Matic uses the MaxTorque clutch with the 10 tooth #41 sprocket and is made as part of the clutch. It is possible to have a machine shop remove the teeth and make a special pulley to press fit the modified shaft [as I stated several have done so]. Max Torque makes a clutch with a pulley, however the pulley is too large and won't produce the required ratio. The Whizzer sheave is 15" and the Max Torque pulley clutch has a 3.2" drive pulley. Sadly the clutch is costly and the final ratio is 4.86 X 1 and needs to be 5.6 X 1 or greater for the Honda or HS 49 CC motors. If the output pulley is 2.5" then the final ratio is 6.31 X 1 and will work well.
I will include actual pictures of our test units to show we did the research for everyone that wanted to use rear belt drive.
Have fun,
