Twinpot Brake upgrade on 78 Skunk

[salty_monk]

Need a shipping address & telephone please mate

 

[Chuck78]

http://www.ebay.com/itm/361441589598

95-98 CBR600F3 rotors relisted, $60.99 shipped! 74mm bolt circle, need to redrill the pattern using salty's spacers as a template. Very excellent deal...

 

[salty_monk]

That was a good price and they went quick!

 

[Chuck78]

actually they did not sell, no bids, already relisted once, watch that auction and see if they get relisted again.

 

[sparky-biker]

Have PM'd you.

 

[kvillebuckeye]

Pretty awesome idea. Has anyone done anything to upgrade the rear disc in a similar fashion? I'll be honest that I didn't read all 57 pages of this thread to see haha

 

[tkent02]

It's just not needed. With adequate front brakes there's very little weight on the rear under hard braking anyway, the stock brake is fine back there.

 

[kvillebuckeye]

Yea I understand that the performance benefits are not going to be great but just for looks. I like the newer calipers and discs. And also It would be nice to eliminate the bar that stabilizes the caliper.

 

[salty_monk]

Yes no need. One guy fitted a CBR rotor back there for appearances.. for me the slotted GS rotor is close enough. Bike brakes rarely match F-R anyway...

 

[Chuck78]

1977 rear discs need seriously upgraded, a 295mm 12 lb rotor is extremely excessive! Downsize to a 1978+ rotor & caliper hanger, or fab your own caliper hanger and have a machinist make a rotor adapter to fit a rear modern rotor around 260mm diameter, and a similar tokico 2 piston caliper from a GS500, Zephyr, etc. This would save substantial weight, but is all custom.

Look at Rickman rear calipers for how to get rid of the brake stay. No need to ditch them, really. Even tons of modern sport bikes run them still.

I'm running a newer 275mm front right floating rotor of substantially less weight on my rear.

 

[Chuck78]

Rear that I'm running:
http://metalgear.com.au/mgear-brake-disc-front-gold-centre-p-11052.html

Much cheaper to run the 1 piece steel snowflakes or whatever may be the lightest of the stock gs 275mm rotors to replace the monster 295mm 77 rear discs. The metalgear.com.au rotor is awesome though (pic)

 

[salty_monk]

Very nice. Got any pics fitted? I can't say I'm too worried about weight on the GS but I do have one of the slotted rotors fitted (from a 1980 from memory)

 

[Guest]

Just read this entire thread last night. Lots of good info. 97 VFR 750 rotors re drilled with a jig will fit on my 78 750 E, correct? Can I use one of my old rotor for a jig? Thanks.

 

[salty_monk]

Yes and no.... You need hub spacers to get the right offset as well.

 

[Guest]

Right, about 4mm I think. I am slowly gathering things for this mod. thanks for the confirmation Salty. I will be contacting you soon about brackets if you have any left.

 

[sparky-biker]

Got my brackets yesterday - a day after my birthday, cool prezzie! thanks Dan. Cant wait to get them fitted, it will be some time over the next couple of months whilst I've got the bike off the road for a couple of other winter jobs! Will post some piccies soon!

 

[Guest]

I just received a set of rotors that are supposed to be off 96 VFR 750. One is offset 17mm, the other is 14mm. Is this correct? I had assumed they would be the same. Can I shim them out to be equal? Thanks

 

[Chuck78]

I believe you must've gotten rotors off of an ABS model... non-ABS models are what we need. Sure you could shim it, but I'd opt for finding another rotor with that same directional pattern.

 

[Guest]

Well sh1t, that's not what I wanted to hear. Well back to Ebay I guess. Thanks for the quick reply Chuck78

 

[salty_monk]

Yes you could shim it out... I may be able to find a shim of the correct thickness.