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Motorized Cruiser Bicycles The beach cruiser has always been great bicycles to motorize. They just look good with a motor. Use this section to share and discuss about motorizing this classic.

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Old 03-15-2011, 06:49 PM
FlyingSchwinn FlyingSchwinn is offline
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Join Date: Oct 2010
Location: Oregon
Posts: 28
Default Centrifugal clutch?

I have an old Schwinn Heavy-Duti that I would like to put the Centrifugal clutch kit on and need to know if anyone has done it. The kit with the wider clutch housing and required pull start seems very wide. The crank on my Schwinn which I pirated from an Electra to fit the original kit would not be wide enough to fit the pull start and clutch housing.

All of the cruiser type bikes seem to have narrow curved cranks as opposed to the mountain bikes which have wide cranks with 90 degree angles. Are the mountain bike cranks interchangeable with our cruiser cranks? If anyone has done this would you please let me know what type of crank was used in the project. I am on the third clutch lever housing because the pin inside falls out and the lever shaft pops out the top from vibrations. I'm tired of the lever crank. Thnx!

Last edited by FlyingSchwinn; 03-15-2011 at 06:56 PM. Reason: automerged doublepost
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Old 03-24-2011, 09:37 PM
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LS614 LS614 is offline
Motorized Bicycle Elite Member
Join Date: Dec 2009
Location: CT and MA
Posts: 1,230
Default Re: Centrifugal clutch?

when you put in the new crank, was it a 3 piece or one piece crank? If it is one piece you will need to get extra components to get a mountainbike crank to fit like this Sick Bike Parts if it already fits a 3 piece, just get a new crankset.
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Old 03-24-2011, 10:19 PM
msrfan msrfan is offline
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Join Date: Sep 2010
Location: Southern California
Posts: 1,484
Default Re: Centrifugal clutch?

The centrifugal clutches should have a one-way or sprag bearing allowing you to pedal start without the need to purchase a pull starter. They retain the manual clutch so the bike can be started as usual and can be rolled around with the motor off by disengaging the manual clutch with the locking lever. I have two of the auto clutches and they have the one-way bearing. I have not used them yet but plan to in the near future. .
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