Twinpot Brake upgrade on 78 Skunk

[Chuck78]

Yes, what Dan said, & measure from center of axle to center of lower caliper mounting bolt on each fork slider. The 2 measurements should be the exact same. If what Dan says is the problem, one side would be 10mm further than the other (half of the difference between 275mm & 295mm OEM dual disc vs dingle disc brakes).

Measure both rotors to make sure they are identical. They should be, but some Honda models with ABS have one rotor that works for us and one that wont. The difference should not be in the diameter in that case as far as I have seen, but in the offset of the rotor.

[salty_monk]

Let's have a side on pic too if you can. I would say your left leg is off a single brake model and the other one is off a dual brake model.

I noticed that my left caliper sits 1/4 or so higher from axle then right side. Pad is too high. What am I missing?
IMG_0007.jpg

[salty_monk]

I got some more bracket kits for anyone that is in need...

[salty_monk]

Yes I have some. I can get you some out over this next week no problem. I'll PM you.

I ended up going with a different set of rotors off a 93/94 900rr. They measure 296 and have a different hole pattern than yours. I was wondering if you had any of your bracket kits available?

[salty_monk]

Calipers are right.... The rotors might be a bigger dia. The RR came with bigger dia some years.

They look the same as the ninja calipers to me. Somewhere in this thread Salty listed a bunch of bikes the twin pots come on and the gsx1100g was one.

[Chuck78]

Yup, those appear to be the ones. I didn't know those calipers came on a 91 gsx1100g katana, however. Do the look identical to the GS500 and ninja 250 calipers? Short on time or else I'd compare myself. Pretty certain those will work though. They look to be identical as far as I can tell.

Salty,

I'm thinking about upgrading the brakes on my '78 skunk restoration. Could you tell me if these calipers and rotors will work?

http://www.ebay.com/itm/401205984388?_trksid=p2055119.m1438.l2649&ssPageNa me=STRK%3AMEBIDX%3AIT

http://www.ebay.com/itm/192033696479?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

I think they're right but I just want to double check. If I go with these, do you have any kits available that aren't black?

thanks!

Hi Guys, new to forum and have been following brake thread.
I just wanted to let you know that I managed to vastly upgrade the std brakes on my friends GSXR 1100 H (87 MODEL SLABSIDE) with the std 3 spoke wheels. I tried various ways, and eventually put a Nissin 17mm Master Cylinder off a Yamaha XJR 1200/1300/FZR 1000 on to the bike. All other things were std, apart from braided hoses and this greatly improved the performance by at least 50% with no feel or travel issues. The only thing I had to change was the Banjo Bolt, as the cylinder has different thread.
Regards Rob GSX 1100ET

I had a spare pair of CBR 900 296mm discs that intended to keep but a shortage of Christmas cash has made me put them on eBay.

I've started them at £20 in a 7 day auction ending next Sunday 18 Dec. Free postage to the UK.
20161211_155516.jpg

http://www.ebay.co.uk/itm/-/182385641494?

[salty_monk]

We did have one set on here years ago that had issues with the bleed valves not sealing properly.. that was causing something like the issue you are experiencing, got to be worth a check.

Different M/C's will feel different. If in doubt pick up an EX650 one & try it. They are newer & often available for $20-$30 on Ebay.

[mmattockx]

Here's my issue. Good master, steel lines, rebuilt(not by me) calipers with K&L parts. With bike sitting(or driving)Initial lever pull travels what I feel is excessive and builds pressure as it goes towards bar, still braking well other than initial long travel.

I have the same calipers (off a ZX6, tho) and also have very long lever travel before they bite. I rebuilt mine with OEM Kawasaki parts before installing them. Pumping the lever makes very little difference, it doesn't come back like after you have changed pads and have to push the pistons back out. It simply takes quite a bit of lever travel to get them engaged. I have just learned to live with it, the lever never comes back to the bar and won't trap fingers so I am not too worried overall. I do plan to pull my MC apart this winter and see what condition the stack is in just as a precaution, but there isn't anything that makes me think it isn't working correctly.


Mark

[limeex2]

Thanks! Makes sense but doesn't make sense...Here's my issue. Good master, steel lines, rebuilt(not by me) calipers with K&L parts. With bike sitting(or driving)Initial lever pull travels what I feel is excessive and builds pressure as it goes towards bar, still braking well other than initial long travel. 2 quick stabs on lever and it is 2 finger great braking. The guys on the ZRX forum are fanatics about brakes and the consensus is caliper seals are rolling causing excess piston movement before sealing up and to rebuild with OEM and NEVER use aftermarket stuff for brakes. Thoughts before I spend time and $$$ ? Where is a good place for brake seal grease?