Springer and Frame Modification For 650 BSA Chopper

by Bobby C
(Richardson, Texas)

I have a 1971 650 BSA and want to build a chopper from this bike.

I have a complete machine and welding shop with over 50 years working in this environment.

It's a blessing to find this website, by the way.

I will order the blueprints for the springer forks first.

However, my question is, can the springer prints be modified for the BSA, along with your frame?

Thanks,

Bobby

Comments for Springer and Frame Modification For 650 BSA Chopper

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Jan 20, 2013
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same boat bsa
by: Anonymous

i1m building an a65 also im trying to figuer out how to make my stock 1967 bsa frame into a softtail ive never seen 1 and i want to be the first.

Mar 20, 2012
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Modifying Your BSA
by: Custom Choppers Guide

Hello Bobby,

It’s always nice to have a donor bike to pull parts from. I looked at several photos of a 1971 650 BSA. It seems like a good sized motor and has a unique exhaust port location. I don’t have dimensions so I was not able to make some precise measurements, but here is a photo showing one of the rigid Sportster frames that we have. There is a central support bar in the middle of the frame. You’ll need to make sure that your components can fit around it.

Sportster Frame Dimensions

This frame was designed around a Harley Davidson Evolution engine. The Springer fork plans can easily be modified for your bike. You can also adjust the rake angle as needed. Just make sure you maintain the proper trail to insure that you have control at high speeds. Also note that the Springer fork plans have large plates near the top. This may affect your turning radius depending on how your gas tank is situated. Take a look at this clearance as well prior to making your design adjustments.

Springer Fork Picture.

Feel free to let us know with questions and we will do our best to address them.

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