Author Topic: CB750 K4 dual discs / front end swap  (Read 1829 times)

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Offline Clinto

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CB750 K4 dual discs / front end swap
« on: August 06, 2012, 05:20:26 PM »
I know there are a ton of threads on this topic but I've been searching and reading for a couple of days and want to get some input/advice on my situation specifically.

I basically just want a better brake set up on my CB750 K4 project. I understand that rebuilding my master cylinder and caliper, and getting steel braided brake lines will help a lot, but dual discs is what I really want.

I really would love to have a modern front end. I especially like the idea of modern 4-6 pot calipers, sweet looking discs, etc but I'm pretty scared to dive into that. I have only basic tools and very little experience doing mechanical work period, let alone enough knowledge to ask a shop to machine special spacers, sleeves, etc in order to get a modern front end to fit on my frame. If there's a super secret way of doing this easily, I'm all ears.  ;D I've looked over Industrial Cafe's GSXR front end swap thread multiple times and he does a great job of breaking it down but I still don't know if I could do it.

So that leads me to just swapping in a front end of a 75-77 GL1000 in order to get dual discs. I've heard it's pretty much a bolt-on swap and very easily done if you have the correct parts.

So here's my potential shopping list for a 75-77 Goldwing front end swap:

*75-77 GL1000 Front forks
*75-77 GL1000 Top and bottom triple tree
*75-77 GL1000 Calipers (both)
*75-77 GL1000 Discs (both)
*75-77 GL1000 Rim (Replace my 750 rim with lighter Goldwing aluminum rim?)
*75-77 GL1000 Master Cylinder? (or can I use an aftermarket MC? Suggestions?)
*New SS braided brake lines
*I would love to have an aftermarket top triple tree instead of the goldwing one that has the handlebar brackets (I plan on using clip ons) Anybody  have a lead on where I could find one?
*75-77 GL1000 Speedometer drive?
*New tapered bearings? Will any that are made for a 750 K4 work?

Am I missing anything? Should I just go for the modern front end? I know there are a lot of questions in there but any guidance, advice, or input about any part is appreciated.

77 CB550F2

Offline Grabcon

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Re: CB750 K4 dual discs / front end swap
« Reply #1 on: August 06, 2012, 05:32:52 PM »
CB750   1974 - Gone
CB750F 1976 - Gone :(
CB550   1978 - Gone & now back
CB900F 1981 - Gone
ST1100 1991 - Gone
ST1100 2000 - Gone
VFR800 2008 - Gone
ST1300 2008 - Gone
BMW F700GS - Wife's
VFR1200X 2016 - Mine

Offline scottly

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Re: CB750 K4 dual discs / front end swap
« Reply #2 on: August 06, 2012, 06:51:00 PM »
It's fairly simple to add a disc to your stock front-end. You will need a disc from any 750 K model,and a caliper with the mounting arm to match your year (should be K3-K6?). Your master cylinder will work fine. The speedo drive can be a bit of a pain, but it's all been done before, many times, and the results in braking are worth it.
What wheels are on your bike? From your avatar it looks like Lester or Morris?
Edit: just looked again more closely; not Lester or Morris...
« Last Edit: August 06, 2012, 06:53:24 PM by scottly »
Don't fix it if it ain't broke!
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Offline Trounce

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Re: CB750 K4 dual discs / front end swap
« Reply #3 on: August 06, 2012, 08:00:07 PM »
Check the local bone yard for a 77-78 Super sport front end...its as simple as swapping the forks and wheel...
"You don't know till you try and fail....and then try again!