frame too small for 4 stroke. smaller crank sprocket?

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Spunout

Spunout

MB Builder Extraordinaire
Jul 21, 2008
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coventry, RI
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i thought a pacific capeland would make a nice bike four my 4 stroke, but after installing the mounting plate as low as i could (1/4" just above crank sprocket) theres nooo way its going in.
i didnt count the teeth on crank sprocket, but i think its a 44tooth. i'm thinking the only way to do this without frame mods is to use a smaller crank sprocket. how small do they go? 25 tooth or so? should make a big diff in size. i need to lower the mounting plate at least another 2"
ideas?
 
azbill

azbill

Active Member
May 18, 2008
3,358
5
38
63
Fountain Hills, Arizona
I am using a 36 on the stretch,,,they are really cheap... like 10$

you might wanna pic up a kiddie bike from goodwill or something, then you can use the shorter crank arms as well ;)
 
RedB66

RedB66

Active Member
Dec 28, 2007
1,020
14
38
Sunshine State
I've used a 25T before. They are very small and fairly common. If you search for a BMX sprocket you should be able to find one. The one pictured is a 25.
 

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jcchappy

New Member
Aug 18, 2009
144
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antlers, ok.
some mountain bikes gave a removable front gear that can be used. thats what I use on my builds. It lets the engine sit lower and is lots easier to crank.
 
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