Twinpot Brake upgrade on 78 Skunk

[Adi]

Hi Dan
The brake bracket kit you sent through is excellent, thank you so much. I intend to use it on a twin disk front end with 296mm CBR disks etc as advised, but I have been playing around with single disk set up on one of my GS750’s. I picked up an Aprilia Tuono 320mm disk and drilled out the disk holes to 9mm to make it fit, though considering remaKing the holes in between the original holes with your spacer as 8mm holes in exactly the right position seem a better idea!

The sticking point at the moment is the disk offset as it is only about 8mm on the Aprilia 320mm disk and, as I measured it, about 21mm on the original disk, but I am thinking I can double up the spacers behind the disk and replace the original bolts for slightly longer ones to compensate.

Would this seem plausible?

I added an bandit 600 master cylinder with stainless hoses and it all seems far more effective and significantly lighter.

This got me thinking about the rear caliper and particularly the weight of it and the fact that it is way over powered.

Does anyone have any suggestions regarding rear brake replacements / upgrades? I have put this out as a separate thread question but thought I would ask here!

Regards
Adi

[salty_monk]

Yep, one back today. I should be able to ship them out tomorrow if all goes to plan

cool! can ya send me a set please? i'll message you!

[salty_monk]

One back at ya... Those Disks & Zephyr Calipers look like the right ones.

I have brackets on the shelf. Powdercoated black as normal. Henry Ford Model!

[Joegs1100gk]

Hi Dan, PM sent regarding bracket set. Cheers

bought some guaranteed genuine Honda items for an extra tenner they are 296mm dia so they should be ok also got some ZR 550 Zephyr calipers from Germany all i need now are some brackets

https://www.ebay.co.uk/itm/173329296890?ul_noapp=true

[Chuck78]

I don't recognize the looks of those rotor centers, I think they are aftermarket. Not sure if they are EBC though, but they are unfamiliar looking. If they fit the model stated, then they should work.

hi Dan you got any brackets in stock for the brake upgrade? for my 1978 GS750?

https://www.ebay.co.uk/itm/112894361898?ViewItem=&item=112894361898&fromMakeTrack=true

these discs correct?

cheers bud! looks like im going to have to spend some time on this!!!

[Chuck78]

Your pictures will not enlarge, not sure how you posted them, but zooming in to the very fuzzy thumbnail pictures, they look like opposed-piston 4-pot calipers, which will not work so well for this because the vintage wheels are wider in the spoke area. Also, those calipers are not the style that the brackets being sold in this thread are designed for.

They must have the reversible steel mounting bracket with the lightening holes drilled into it, and two pistons on one side of the caliper only, one larger than the other. Look up a 1989-1996 or maybe 1999/2001 Suzuki GS500 caliper.... if a caliper looks just like that, then it will fit. The GS500 will only give you one side, you need dual disc. So look for a Concours Kawasaki, some ZX 1100 ninjas, some zx600 Ninja if I recall, or a GSX 1100 G Suzuki. There should be a fairly comprehensive list somewhere in this thread that tells you what donor bikes are good to get the calipers off of. If hunting single calipers, early EX500 ninjas have a left caliper, later EX500 ninjas have a right caliper, or vice versa.

[johnod]

Dunno , pics don't open.


If you, like send me your email address and I'll send you the list of parts that should fit.

will these calipers do the job?
Mouse over image to zoom

Have one to sell? Sell it yourself

Details about Kawasaki ZZR1100 ZZR 1100 ZX1100D 1993 Front Brake Calipers

Hi Guys just uprated my engine 1978 GS750 - 840 now i really need to uprate the front brakes so what will i need for the job? I'm in the UK

[johnod]

Good stuff. You can use 6 Stock Suzuki or Kawasaki caliper bolts with a fine thread nut behind. That's generally what I do.

Dan

I looked at that, thought they looked short for the nut, will recheck that.