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xs650 > > Frank-in-Bike, Non XS parts that are Interchangeable > > Wheels, Brakes and Controls > > Rear drum to disc conversion


Rear drum to disc conversion
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scotts
Full Member
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Joined: Apr 03, 2007
Posts: 689
Location: Rock Hill, SC
PostPosted: November 20, 2008, 10:14 am    Post subject: Rear drum to disc conversion
Besides the obvious, what's needed to convert a bike with rear drum to disc?
I know I'd need the correct wheel, rotor caliper and master cylinder. What else is involved?
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weekendrider
Support Staff
Support Staff


Joined: Apr 20, 2007
Posts: 1284
Location: SW MO 2x83SK 79F 78E
PostPosted: November 20, 2008, 12:17 pm    Post subject: Re: Rear drum to disc conversion
The swingarms have different bracketing. Might be easier to do a swingarm swap also.
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xsleo
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Joined: Oct 28, 2007
Posts: 1528
Location: Earlville NY
PostPosted: November 21, 2008, 7:44 pm    Post subject: Re: Rear drum to disc conversion
on the disc brake the strut hooks to the top of swing arm. either weld a new bracket to your swing arm or get a disc brake swing arm. the brake pivot shaft is different and the pivot shaft stop is different. you will need to add mounts to hold the m/c. i did it on my 75. i added a bent piece of steel on the drum brake pivot stop to make the stop for the disc pivot. i brazed a couple threaded rod connectors to the frame to mount the m/c. not hard to do either mod, and i can swap back to the drum set up just by swapping the parts back.
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'75 XS650B with a 79 dual disc front end, rear disk brake, Chrysler reg, Radio Shack rect, LED tail/ brake and turn signals.
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