Thread: AMF Roadmaster
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Old 07-25-2013, 02:50 AM
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silverbear silverbear is offline
The Boy Who Never Grew Up
Join Date: Jul 2009
Location: northeastern Minnesota
Posts: 8,131
Default Re: AMF Roadmaster

Originally Posted by dracothered View Post
I found the engine I will put on this bike...

50cc moped engine w/ Pedals

Would you just get rid of the normal pedal side sprocket with one of these?

This is what it has...

Displacement 49cc
Engine Type Air Cooled, Single-Cylinder, 2-valve, 4-stroke
Bore/Stroke 41mm x 47mm
Final Drive Chain
Fuel Delivery no
Fuel Unleaded / 93 Octaine
Reccomended Engine Oil 10W-40 Petroleum Based (Nonsynthetic)
Kick Start Pedal
Electric Start Yes
CDI no
Auxillary Output Yes
Transmission 2-Speed auto w/ Hi & Low range selector
Shift-Pattern no foot shifter
Semin auto (no hand clutch)
You asked about removing the present pedal from the bike frame. My guess is that the pedal being built into the engine you are choosing is designed so that pedaling forward moves the bike forward, then freewheels while not pedaling and giving a smart kick backwards on the pedal is how you manually start it. Pretty slick! The Tomos A-35 is set up like that. So, you end up with just one sprocket at the rear wheel corresponding to the engine sprocket. Left hand side, in other words.

If indeed this is how your intended engine is set up then your perfect solution is to remove the little bottom bracket extention from the bike frame and hang the engine under the frame. There should be plenty of room. But I wouldn't cut it off until I knew for sure how the engine was set up. This would give a low center of gravity and make the bike handle nicely all the while looking good. Cool motor!
Someday when I grow up I will probably lose interest in toys with wheels, but until then...
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