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I made a prototype for the CB 750 SOHC Front forks. The 1970's CB series front forks have 2 limiting factors: 1) the fork width is very narrow 2) the caliper mounts to the inside of the fork leg Combine these 2 factors and you have very little room to work with to mount a newer caliper...

The problem with the stock CB 750 forks is that they are very narrow. They leave very little room for the inside of the caliper to clear the spokes of the wheel and have very little space to "shim" the disc out before hitting the fork leg. Here's a prototype that I made for a customer on his...

That's why you need a correctly sized master cylinder that actually works like it should. If you have "instant lockage" then something needs to be corrected (Smaller master cylinder). Air in your brake lines? Never heard of that one ...

Every where I see a link to the "CB 750 dual disc conversion" it is incorrect, and it's like most people copied the same WRONG information and published it on the net. The CB 500 speedo drive plate is NOT a bolt on and needs to be modified to fit with dual disc(its the same as the CB 750...

I usually have to modify other discs to fit the CB wheel. Using a GL 1000 front end would be a better choice as they are wider and allow more options for disc and calipers. Using a mag wheel also gives more room for multi piston calipers. The GL style of caliper mounting (tabs behind the fork...

Heres a link to what I did using stock gauge assemblies . No one made a "Black Bomber" style gauge for my XS 650, so I had to. Make, make do, or do with out. http://dotheton.com/index.php?topic=10619.msg93202#msg93202 Fishhead

You'll need to run 2 wires (1 for each side) from your front running lights to the rear lights to have them as running lights. I'm not sure if your particular bike turns off the running light on the side that the turn signal is being used on, but if it does (on the front) you would need to run...

Cool Beans !! I have had a a bunch of those through out the years. Mostly the 350's, but the 250 are very simular. The very early models had aluminum rims and TLS front brakes. Check where the frame down tube mounts to the swing arm area as they were prone to cracking in that area. Also check...

My old shop dog, Princess. And at Christmas time. Teddy (he has no teeth so his tongue just hangs out most of the time). Pete, with a Mohawk Fishhead

I busted up the stock gauges and made an oval "pod" to put both of the mechanics in (Yamaha XS 650). My original intent was to mount it into the headlight bucket like the CB 450 Black Bomber, but it ended up being wider than the headlight I am using. I put the mecanisms as close together as...

Sorry for the late information, but the spokes are the same. Heres a set of 16 inch spokes labled for the CB 750, 500,550 CL/CB 450.

I think its a "speed warning light" and it would light up at a specific MPH to alert the driver. I have seen them mounted on the "rhino horn" gauge mount on the early 750 sandcast. They are probably specific to certain markets (Japan? UK ?) and weren't installed on all models. Fishhead

Brake technology has come along way since the 70's. What was state of the art back then is now obsolete (on new motorcycles). A hard line from the master to the splitter may be prone to crack and leak from vibration. Braided strainless steel brake lines would be a better choice (IMO) and also...

I tried to use an 18 inch rim that was for a small (disc brake) hub on the rear of a drum brake CB 750. The spokes were on a bind at where the spoke and nipples meet and would have been the weak link in the lacing and prone to break. The angle of the spoke holes are drilled different...

Thanks, The original intent of the slide show was to show what is involved in making this kit. I did plan to document the caliper brackets, but the wife took the camera to the cabin for a few days and I wasnt able to take pics of the making of the caliper brackets. If you click on the slide...

It has been completed. I have added a few pics to the slide show.

Heres a slide show that shows how involved my brake kits can be. The kit shown is the most involved kit I have yet to make. This kit is being made for Randakk ( http://randakks.com/ ) and it will have 330mm discs and AP Racing 6 piston calipers. He has one of my kits on his early GL 1000...

A stop could be made to limit the return of the frame link (to put the pedal where it is comfortable). It looks like a bolt could be mounted to the rearset mount(under/behind the frame link) to limit the return height of the pedal.

Forgot pic 4

Cutting oil and slow speeds are needed. A drill press helps out alot also. Cobalt drill bits also. A drill bit sharpener is worth getting if you drill alot of discs. I have a mill and when I am drilling discs, the disc(s) need to be centered on my rotary table (pic 1) to get the holes an equal...