Twinpot Brake upgrade on 78 Skunk

[salty_monk]

I wanted to bump this thread as a couple of people have asked me about it. I do have a limited number of bracket & spacer kits left (all powdercoated black as normal) but I likely won't be getting any more following this batch, not so much demand any more.....

I may have a set or two of rotors somewhere & a Master cylinder or two that would work well with either of the caliper types that work (Ninja/Concourse or EX650 / SV650 / DL650)

[JacobB5]

Set of 83 forks have arrived, pair of calipers from 01 Concours arrived, rotors for a CBR600F3 arrved, some various miscellany and I can swap out the front end on this '81 gs1100e for twin pots.

Stainless steel lines I just put on already made a noticeable improvement over the (no exaggeration) 41 year old brake lines (yep, had the original lines manufacture date 01/81 still legible).

[salty_monk]

Be interesting to see what you find out. I've not directly compared a G to an L as far as width from memory.

[Eric]

Thanks- Im going with the G triple to keep the rake reasonable. Ill measure stuff up when I have parts. Pretty sure the leg ctc is narrower, but not sure if the axle mounting faces are the same width. I guess Ill find out!

[salty_monk]

When going from a 650GL to a 650G fork for dual discs, will one need to also change the axle and spacers on a GL wheel to fit the G fork? Thank you.

If you use the original triple tree then in theory the spacer pack and axle should stay the same...

In practice most are interchangeable apart from there is a different in the 35mm fork leg axle as opposed to the 37mm fork leg axle. Most of the triple trees set the forks at the same width. Anything with a 16" front wheel or a 40mm fork (GK) is different.

[topspot101]

How to replace the disk for this bike?

[Eric]

When going from a 650GL to a 650G fork for dual discs, will one need to also change the axle and spacers on a GL wheel to fit the G fork? Thank you.

[salty_monk]

I responded in your other thread. It's a specific bracket set for a particular choice of calipers & rotors on stock forks & using stock wheels. Lots of info earlier in the thread if you read through.

[S2king_customs]

Are you be able to custom any brackets for any calipers or ?

[salty_monk]

I'd love to too! Those FJ guys have a lot more room to work with between the fork legs. We're stuck with twinpot sliding pin calipers I'm afraid, opposed pistons just won't safely fit on anything other than an 1150 using stock forks & wheel.

[SameOG]

Another question:
Have you considered making and selling radial conversion brackets? I'd love to put on the Yamaha six pot radial calipers? RC51 with silver dots.
RC51 Radial Conversion.jpg

[SameOG]

I may be interested in picking up some brackets. First, I'm trying to figure out if the '83 GS550ES calipers will directly bolt on to my '81 GS750E forks. I want to upgrade to opposing piston calipers rather than the sliding/floating calipers.

Question:
Can I install other calipers with your brackets? Specifically, the Yamaha four pot blue dot calipers? FJ1100 with blue dots.
FJ1100 with blue dots.jpg

[salty_monk]

Just wanted to bump the thread to let members know that I do currently have brackets. Due to some drop off in demand over the last year or two this latest batch will likely be the last time I run these.

[salty_monk]

https://www.mikesxs.net/yamaha-xs650-76-type-single-master-cylinder-oem-366-25850-02-00-366-25850-02-00.html?utm_campaign=694122_Mikes%20XS%20Retro%20Master%20Cylinders%20July%202021%20Wk2&utm_medium=email&utm_source=Revival%20Parts&dm_i=4C4Z,EVL6,4B9557,1KE7X,1

These seem like a good option for brand new master cylinders from a trusted source. Look vintage enough for even the older Suzuki’s and are the correct bore size. $61.

I’d be interested in feedback if anyone tried one out.

[salty_monk]

Great, glad it worked out. A couple of people have welded brackets the way you have, seems like it should work ok and has for them as far as I know.

I’d definitely want a good welder as you did, would be good to know the material used originally, I was a bit worried it would “let down” the bracket and make it flex but I think it’s thick enough that you’d be ok even if it did.