Motorized Bicycle Plans

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 Power Bike By Earl Seidlinqer
ASOLINE-powered engines have been
popular with bicycle enthusiasts ever
since such engines were made small
enough to fit a bicycle frame. The power
bike described here is belt-driven. It will
go up to 35 m.p.h. on level stretches. It is
definitely not a toy that can be hammered
or wired together in a few hours, but requires a moderate amount of familiarity
with engines and experience in the use of
machine tools. For the bike shown, a 1-hp.
Briggs & Stratton engine was used—but
any air-cooled engine of from 1 to 1 1/2
hp.
will do the trick. Start construction by altering the bicycle frame (Fig. 1). The rear
forks are cut, bent out, and added to as
required to allow clearance for the second
rear-wheel rim shown in Fig. 4. This rim
is welded directly to the back wheel and
acts as a large sheave over which the drive
belt runs.
A 1/4x6xl3-in. steel base plate is notched as shown and welded to the
frame. Care must be taken to have the
notched side toward the sprocket side of
the bike. The notch makes room for the
brake pedal.

 

 

 

 

 

 

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