'79gs1000 salty monk cbr6 rotor concourse calipers upgrade

[garyS-NJ]

I found the thread but it's 64 pages long to read. Anyone know the length of caliper mounting bolts with the bracket in place. I was gonna figure it out with a fit check but it's raining and I'd like to buy the bolts and powder coat the heads today

[salty_monk]

Same as stock. M10x40mm fine thread. Assemble with blue loctite.

[garyS-NJ]

Thanks Dan! Hey while I have you I'm looking at these gold cbr6 front rotors and thinking would be nice if I could swap in a gold rear rotor. Is there a rotor or rotor & caliper upgrade for the back?

[salty_monk]

The rear is opposed piston so already pretty capable. Similar to what is fitted on a modern bike (just heavier cause it's old...). In theory you could swap in a CBR rotor back there, I think one guy tried it and gave up... not worth the hassle.

I guess you could paint a later stock rotor to look more like the CBR... I did it the other way on a skunk once, painted all the spiders black. I can't say anyone ever noticed they weren't a 100% match...

[garyS-NJ]

Thanks again Dan I figured out yesterday the drilled later model rotor and plan to powder one inside to match the cbr rotor. Then maybe I'll gold powder the new rear sproket and chain tensioner and some hardware.. maybe the brake caliper stay (going ino the rabbit hole,, UT oh what aboutvthe caliper mount...). Hey does the latest salty monk front brakebupgrdevstill your concourse calipers?? I read someone on another forum mention diff calipers

[salty_monk]

Latest bracket uses Ninja/Concourse/SV650/DL650/EX650 calipers.
the EX650 ones are the newest of them available really (still Tokico not the even newer Nissin EX650 ones, they would need the holes drilling out and tapping to work…).

I did that primarily for parts availability. The Concourse calipers have a slightly better feel to them in my opinion, maybe because of the two different piston sizes they use… very similar no matter which you pick though.

[garyS-NJ]

Latest bracket uses Ninja/Concourse/SV650/DL650/EX650 calipers.
the EX650 ones are the newest of them available really (still Tokico not the even newer Nissin EX650 ones, they would need the holes drilling out and tapping to work…).

I did that primarily for parts availability. The Concourse calipers have a slightly better feel to them in my opinion, maybe because of the two different piston sizes they use… very similar no matter which you pick though.

So no benefit to the late ex650 nissan calipers over the earlier concourse calipers? I have the concourse calipers but kinda like nissan over tokico..

[salty_monk]

The Nissin ones won't work without the holes on the caliper being drilled out & re-tapped. This is something that would have to be done carefully to ensure the new thread was square to the caliper body & also to ensure enough "meat" was left behind in the bracket..... It's not something you should approach without the right tools/skills/experience for sure.

Both the other calipers that work are Tokico. The main difference is the earlier ones have a small & a big piston. The newer ones have two same size pistons. Both work very well.

[garyS-NJ]

OK I'm in a quandary. The stock front disc's fit well on the hub but the cbr6 disc's have some slop. If I put the outside speedo drive trim ring (that which lies immediately under the disc locking plates gor nuts) above the salty monk spacers, it takes up the slop but I lose my 0.190" overhang. If i put the trim ring on the outside like the stock set up, then I'm relying on only the bolts to center the disc as the trim ring itself has some play on the hub. And stacking it this way it looks like I would only need to trim very little off the trim ring maybe 0.015". 20231014_165630.jpg

[garyS-NJ]

I assembled the wheel and rotor with trim ring outside and looks like the trim ring acts to stabilize the speedo drive so is 0.010" trimmed off about right ?

[salty_monk]

On your age of bike you may not need to trim that ring at all... The newer ones (80+) you need to trim about 3/16".

Yes it goes on the outside and yes the stock shoulder bolts act to center the rotor (that's why they are shoulder bolts).