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Rear hydraulic brake conversion - '51 FL

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Old Jun 8, 2024 | 04:39 PM
  #11  
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Originally Posted by TwiZted Biker
Around Kansas City at the time you could find a decent runner under $400, answered an ad, BSA $150, rode off on a nice Royal Star for $100,
Ohhh... man, those were the days. That'd be a sweet alternative ride to have right now...

Here's a couple shots of my DIY 11.5" front disc conversion for the '71 Bonny (just mounted the tire but it's too bloody hot to work this afternoon).

First is while building the Boranni wheel (that used Sporty hub did not look like that when I bought it), second is my caliper adapter design (those '80 sliders looked like they'd been used for jousting - 8 hrs of hand sanding before buffing). It's hard to see here but Buchanan's suggested 1mm tapered spokes to approximate the more slender rear Triumph 'conical' hub spokes near the rim. Looks pretty good...

Last shot is from an early 'proof of concept' mockup, but included to show the 'narrow band' Harley-spec Performance Machine rotor I chose. I like it because the spoke design reminds me of a '70s mag wheel, so seems to fit the aesthetic I'm going for on this custom bike. Paint is custom mixed based on '66 Pontiac GTO, Chevelle SS, 'mist blue metallic' with just a touch of pearl and teensy flake you don't see anymore...







 
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Old Jun 10, 2024 | 06:28 AM
  #12  
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That looks like one the calipers I have in chrome LOL!! What's center to center on the bolt's ?
 
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Old Jun 10, 2024 | 09:50 AM
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Originally Posted by TwiZted Biker
That looks like one the calipers I have in chrome LOL!! What's center to center on the bolt's ?
Yeah, you're right on the money. It's Wildwood's aluminum 4-pot Harley (rear) caliper, the GP310, with a bolt-spread of 3.5". They do sell it in various finishes including chrome.

Here's how it looks on the bike... kinda like it was meant to be there, IMHO. And a 4 lb savings in unsprung weight over stock wheel and drum brake combo...


 
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Old Jun 10, 2024 | 12:56 PM
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Nicely done, like that.
 
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