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  #1 (permalink)  
Old 03-25-2018, 10:49 AM
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Old front rotor hub

All,

My kid and I are putting together his "chopper", (2001 1200) and he bought a used 21" narrow glide front rim. Its an OEM 40 spoke. The front brake rotor is a 10", so we need to change it out to an 11.5". The hub on the original rotor measures just under 2.5", but everything I find on the interweb states replacements for a 2.25" hole. What am I missing?
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  #2 (permalink)  
Old 03-28-2018, 02:49 AM
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47 views and no one has any idea? I've decided to have the rotor milled to fit the front hub.
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Old 03-28-2018, 02:33 PM
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Quote:
Originally Posted by CIC2016 View Post
47 views and no one has any idea? I've decided to have the rotor milled to fit the front hub.
I believe that before 2000 harley rotors had a smaller opening for the wheel centering lip( 3/4 bearings)
Later models, wth bigger, 1 or 25mm bearing the lip grew slightly- so did the rotor centering hole.
I had old rotors machined out for newer rims. If that answers the question.
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Old 03-29-2018, 02:39 AM
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My son bought a hub circa 1983 or so. These had an enormous hub hole around 2 3/8". Of course around here, there's a minimum charge of $200 at a machine shop, for a $20 rotor!
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Old 04-23-2018, 06:26 AM
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New issue! The clearance between the rotor and fork is very small. the stock 2001 Sportster 4 piston caliper is too wide, and there isn't enough "meat" above the pistons to mill down to fit.

Jaybrake makes a narrow caliper and bracket that will fit, but my son is on a budget and can't swing the near $500 for the caliper and bracket.

I was thinking of adapting an old 35mm single piston caliper, but wanted some feedback on this idea. Ill have to make a bracket, and shim everything, but wanted to see if any of you guys had a better idea. I don't have one, but it looks like the inner side where the brake "puck" fits, was made for just this reason.
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Old 04-23-2018, 07:29 AM
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There must be a correct , very small bore master cylinder for such under-powered caliper to be effective.
Check out this education article. I followed this for years and customized my one off braking systems to be pretty decent:
http://www.vintagebrake.com/mastercylinder.htm
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SORRY FOR THE UPPER CASE. I AIN'T YELLING. I JUST MAKE TOO MANY TYPOS IN THE LOWER.

113"s&s, Walz softail 2000/2012 prostreet
96"s&s, Daytec dyna/ softail hybrid, 1998/2010 chopper
127"Ultima, Chassis Design rigid 2013 bobber
120"Ultima, Kraft Tech rigid 2014 bobber
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