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Twinpot Brake upgrade on 78 Skunk

salty_monk

salty_monk

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EDIT 11/17/2025 - Yes I have a few sets of brackets/spacers/hub spacers left - Price is $115 shipped Priority in the USA. Most other countries tend to be around $128-$140 shipped 1st class package.

Newest brackets also allow the new Ninja EX650 Tokico calipers to be fitted as well as SV650 & DL650.

Latest: - We now have a bracket for the L Model thanks to Colab with a couple of members here. - I don't have brackets yet. PM to register interest.



Just some pics of the latest on the skunk... Soon to be replicated by one Mr Tom MLC (no doubt in red!) & Mr JSkellington.

EDIT: DIRECT LINK TO PICS PAGE ON PHOTOBUCKET:

http://s6.photobucket.com/user/salty...700258&page=11

http://s6.photobucket.com/user/salty...700258&page=12

Also newer bikes (80+ you will need to chop down the speedo drive dust shield by 4-5mm.

Pics of that here (last two pics) http://s6.photobucket.com/user/salty...9700258&page=2

FURTHER EDIT TO SHOW POST LINK WITHIN THIS THREAD TO COMPATIBLE PARTS LIST:

http://www.thegsresources.com/_forum...87#post2236887

Dan :)

IMG_0405.jpg


IMG_0406.jpg


IMG_0404.jpg
 
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Received all my gear today Dan. And I scored a nice set of rotors on ebay. I hope I didn't beat out Jack! How 'bout some pics of what you did with those spacers. And also the two round cylinder thingies you sent me.

I'll post some pics when I finish the install.
 
Can you give us some kinda' relative idea of the stopping improvement? Your set-up looks VERY nice!
Hugh
 
Damn...

Who discovered that rotor swap? Has it been around for a while? I can't recall ever seeing a floater bolt on before...

I have a nice set of Nissins off a gixxer that would go nice on my 82.:D

Good info...
 
Another member of the Salty_Monk twinpot conversion team. I borrowed the stainless lines that were on it for another project but you get the drift.
I have not had the bike out so i cannot comment on the braking improvement, YET.

000_1444.jpg
 
Great upgrade

Great upgrade

Nice work on those brakes guys. Steve, engine cleaned up real nice!
I'm partial to GS1000's
 
The difference in performance is "night & day". Loads more power, loads more feel. Takes it to a 2 finger brake from a "oh Sh** grab a handful" stock brake.

I worked the rotor swap out about a year ago, first changed the G over about 7 or 8 months ago & have done a couple thousand miles on it.

To fit this swap.. you just need to get a kit from me, some CBR F3 Rotors & Some Kawasaki twinpot pistons.

You can probably budget:

$30 - $50 on calipers depending on rebuild status, Ebay skills (They were used from about 87 up to 97 so it depends what year you get. Al ot of early ones need new pin rubbers although seals are generally ok).
$30 - $40 on brake pads. (I actually got one set of calipers for $30 with a set of useable pads once...)
$50 - $100 on CBR Rotors (depending on your Ebay skills)
$110 - 120 for the brackets, spacers & bolts. Depending on location, how you send the money etc.

Takes probably 3 or 4 hours to do it the first time as you have to re-drill the rotors using a drilling jig etc.

Well worth the money & effort.

Dan :)
 
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Yes...Yes...Yes. Excellent stopping power! I rode Dan's G last week. D@mn! You could probably do stoppies with this rig!
 
Form and function: this is a superb blend, and Salty is a true pioneer. We all know these bikes have plenty of go. Now you can stop. I'll post a performance review and pictures as soon as I eliminate a vagrant air bubble or two lurking in the splitter, I suspect.

And Tom, yeah, I was eyeballing the same set of F3 rotors you picked off on eBay, but I told myself no spending until I get these Kawasaki calipers bled. Lemme know if you need an extra set of hands with the F3 conversion. I've also got a four-plug Colortune if you're interested in a carburetor party . . .
 
Jack did you get those holes tapped out that we were talking about. Did they turn out OK?
 
Tapping new threads this weekend, Don, thanks to your advice. Both of my GS1000s have spoked wheels with hubs tapped on both sides for rotors; on one of them I had no trouble running the rotor bolts in all the way, and the Salty Monk conversion is underway, with the elderly Suzuki rotors soon to be replaced with less elderly F3 disks.

On the other wheel, for some curious reason, the bolts bottomed out after three or four turns. I've got a tap and some machine oil. All I need is a little time, and a jar or two of Steinlager to steady the nerves . . .
 
jskellington said:
Tapping new threads this weekend, Don, thanks to your advice. Both of my GS1000s have spoked wheels with hubs tapped on both sides for rotors; on one of them I had no trouble running the rotor bolts in all the way, and the Salty Monk conversion is underway, with the elderly Suzuki rotors soon to be replaced with less elderly F3 disks.

On the other wheel, for some curious reason, the bolts bottomed out after three or four turns. I've got a tap and some machine oil. All I need is a little time, and a jar or two of Steinlager to steady the nerves . . .
Click to expand...

The Steinlager's good, but don't worry about the nerves. Follow my instructions and you will be good to go. Don't forget to look into the CBR900RR Fireblade rotors, they are a good option as well and only have to be drilled out to 8mm and then bolt straight on to the hub. But they need to be the 296mm rotors and not the 310mm ones. So if you go that way check with buyer before you purchase.
 
900RR rotors tend to be rarer & more expensive over here in either size.
Guess they didn't sell so many. They still need a spacer to work with the setup Jack has I think as the offset is still not right far as I can tell.

Dan :)
 
Here's a photo of the twinpot mod, Salty style. Rebuilt the calipers, which were in good shape to begin with. New EBC brake pads and a Kawasaki ZX6 master cylinder combined with Russell steel-braided brake lines. Result after about 50 miles of driving: huge improvement in braking power and control at the lever.

I learned to ride my first heavy bike (a 1979 GS750) on the streets of San Francisco in the mid 1980s. My most frightening mistakes always involved coming downhill, typically with a passenger, and braking too late at intersections. The moral of the story is, of course, think ahead. And get some better brakes.
 
Looks good Jack. I can't wait to finish up mine. Still waiting on those rotors...expecting them on Friday, and the parts order for the caliper re-build...no delivery date yet!?!

In the mean time I'm cleaning up the caliper bodies for their new pait job. Red is my favorite color!

Hey! I might take you up on that colortune party. I only have one plug so I have to do them individually. Do you also have the plugs for the GS1100/1150? Our friend Ken (jadesystem) might like to join us. And do you have a Carbtune syncronizer? I can bring mine to the party!
 
Looks good Jack. One of the things that prompted me to do this mod was how scary the stock brakes were (mine were in good condition with decent pads etc) coming downhill with the Mrs on the back.... I felt like I was at times approaching the limits of how much squeeze I could provide at the lever.

I guess if you're a much bigger guy than me maybe you would be able to put in my pressure but I'm not a complete weakling :lol:

Dan :)
 
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