Twinpot Brake upgrade on 78 Skunk

[Chuck78]

at some point this spring or summer, I will have a set of 35mm dual disc fork lowers to part with if anyone has a single disc and is looking to convert to dual disc. the stanchions are rusted, and my spare stanchions have one that is slightly tweaked less than half a millimeter after hitting a deer. (could be straightened)

[Chuck78]

Just measured mine and they are 295mm I do think the GS1000 over here in the UK all pretty much came with 295mm Rotors, mind you I could be wrong

Offering one of the brackets with caliper attached to the fork it looks like will fit with the original rotor. Is there a reason it can't be used? I do have a slight ringing bell in the back of my mind but can't for the life of me remember if there was a good reason for it not to.

Jeff

if you have a 295 mm dual front disc setup, I have never heard of such a thing, but that would require 310mm rotors with this brake setup.

the only way you would normally be able to use stock GS rotors would be if you have a 275 mm dual disk then used 295mm (single disc) rotors for left and right front. you lose a lot of the benefits that by using the very large heavy stock rotors, and they won't last very long with modern pads.


basically with this brake conversion, if you are running a Suzuki GS fork that had 275mm rotors, these calipers will then be in the position to run a 296mm rotor.
if you are running a single disc Suzuki GS Fork that originally had a 295 mm rotor, then you will need to run a 310mm rotor with twin piston caliper setup. there is no set up with this type of caliper swap that will allow you to keep the same size of rotor that the original caliper ran on.

[bobtail84]

Check post #546 for a list of rotors that will work. The GS550 Solid rotor in on the list, as well as some "L" models. The key is 296mm, most GS's are 275

Hmmm.. Just measured mine and they are 295mm I do think the GS1000 over here in the UK all pretty much came with 295mm Rotors, mind you I could be wrong according to my wife....

[bobgroger]

Just a quick question. Offering one of the brackets with caliper attached to the fork it looks like will fit with the original rotor. Is there a reason it can't be used? I do have a slight ringing bell in the back of my mind but can't for the life of me remember if there was a good reason for it not to. Also the thing that made me think about it was another conversion very much the same but using the drilled rotor.

Jeff

Check post #546 for a list of rotors that will work. The GS550 Solid rotor in on the list, as well as some "L" models. The key is 296mm, most GS's are 275

[bobtail84]

Just a quick question. Offering one of the brackets with caliper attached to the fork it looks like will fit with the original rotor. Is there a reason it can't be used? I do have a slight ringing bell in the back of my mind but can't for the life of me remember if there was a good reason for it not to. Also the thing that made me think about it was another conversion very much the same but using the drilled rotor.

Jeff

Great , thanks mate

[salty_monk]

Thanks Dan ,

all sorted , your message bank is full so cant reply via pm .

cheers

david

Great! Hope the Post is quick for you. There seems to be no good reason connected to their efficiency or lack of it at times.

I made some space in the Inbox too!

[Thumper88]

Just curious if anyone ordered from Powersports Superstore. They often have a good price on parts but I assume they're too good to be true.

I've ordered quite a few times from them--no issues at all.

Thanks Dan ,

all sorted , your message bank is full so cant reply via pm .

cheers

david

[hannibal]

Just curious if anyone ordered from Powersports Superstore. They often have a good price on parts but I assume they're too good to be true.

[salty_monk]

One back at ya, I can't see any good reason why it wouldn't work with that model.

If it doesn't I'll take them back minus postage.

Cheers,

Dan

Hi Salty Monk , does the brake caliper adapter plate fit the gs550 83 with twin brakes .

I have sent a pm .

cheers

David

[salty_monk]

No problem, glad you got them ok. Those Bikemaster units do look good.

[bobtail84]

My brackets arrived today thanks salty_monk. The calipers should be with me on Monday Apr 4 just need to source the rotors then have much fun fitting.

[steve murdoch]

I can't speak to the quality differences but i certainly prefer the look of the Bikemaster rotors.
Could be they are both sourced from China.
To my eye wave rotors should only be on modern bikes.