GSXR1100 lightweight rear caliper

[agemax]

I want to replace the rear caliper on my GS1000 with a smaller, lighter caliper. It has a GSXR1100W caliper and bracket on there at the moment.

Was wondering if anyone knows of a direct replacement, either suzuki or otherwise that is smaller and lighter than the stock item?

TIA.

 

[wraith]

You can use the caliper, hanger and disc off the gsxr1000 k1  K2 nisson caliper.

You will need to have a sleeve made for the hanger as they use a bigger spindle.

Have a look at my Kat project part errr. 

I've got the hanger that has the slid bit (no torque arm) but the gsxr 1000 has a standard hanger, the hanger is the same on the gsxr srad but they use the Tenco caliper, I will put some pics up for you.

Did put the waits on my kat thread.

[wraith]

Pics 

Gsxr1000k1 caliper on srad 

Wight of caliper with pads

Wight without pads

 

Same mounting hole spacing

 

With srad hanger

 

If you use a gsxr1000/srad hanger you will need the disc (all the same for gsxr1000k1 and srad) as the disc is a 220mm instead of a 240mm but they have the same bolt mounting holes as the slingshot and bandit wheels.

Hope this helps.

Nice GS buy the way 

[agemax]

Thanks for the info Wraith. my caliper does not have the torque arm, the bracket fits in a slot in the swingarm. i want to keep it underslung as it is.

I suppose i could always just machine off the lug on the caliper for the torque arm.

I will have to measure the diameter of the disc, i cant remember what it is offhand.

[wraith]

My set up on my kat is the same as yours, have a look at my kat project, as the latter calipers use the slot type hangers but the mounting hole spacing for the caliper is different

[Fazz711]

Harris used to do a dinky rear caliper

[clivegto]

21 hours ago, Fazz711 said:

Harris used to do a dinky rear caliper

I have one of those for a project. 

[Spazpecker]

35 minutes ago, clivegto said:

I have one of those for a project. 

Off a go kart or a ktm freeride thing. 

[Dezza]

The Harris rear calipers look to me like copies of the titchy AP Racing rear calipers that are still available new. Obviously you'd then have to make a new carrier. A more cost-effective option is a small rear Brembo from a Ducati/Aprilia (yawn, seemingly on 90% of specials now). Discacciati do some nice small rear calipers. They aren't cheap but they're still half the cost of an ISR or AP Racing equivalent.

[colinworth79]

Dont use the mini ap caliper if you want a decent back brake as they dont provide alot of stopping force . 

My bike just passes mot each year it's that bad. Likely I dont use the back brake much.

Handy info on using the 1000 k1 caliper.

[Wagola]

The later GSXR1000 rear calipers, K3/K4 I think don't have the torque arm connecting hole as the they have the slot in the mounting bracket as you have.

[clivegto]

1 hour ago, Spazpecker said:

Off a go kart or a ktm freeride thing. 

Harris Magnum 2 is what it was origanal designed for by Harris. 

[wraith]

2 hours ago, Wagola said:

The later GSXR1000 rear calipers, K3/K4 I think don't have the torque arm connecting hole as the they have the slot in the mounting bracket as you have.

Slot type as fitted to my kat gsxr750wr swing arm and wheel with the k3/4 rear disc, caliper and hanger.

[Wagola]

thats the one.

[Dezza]

10 hours ago, colinworth79 said:

Dont use the mini ap caliper if you want a decent back brake as they dont provide alot of stopping force . 

My bike just passes mot each year it's that bad. Likely I dont use the back brake much.

Handy info on using the 1000 k1 caliper.

I know what you mean. One of my bikes has a Harrison mini twin-pot rear caliper and it needs big-boots to induce any real stopping power. Handy for hill starts though.

[Spazpecker]

13 hours ago, clivegto said:

Harris Magnum 2 is what it was origanal designed for by Harris. 

That sounds expensive! Ktm free rides have tiny calipers, mountain bikes have tiny calipers. I like a decent rear brake, to many years offroad not to use it. 

[agemax]

I was kinda hoping i could get a 2 piston Brembo caliper to match the P4's i have on the front.

 

[Spazpecker]

Like this? https://www.Eblag.co.uk/itm/1999-Ducati-St2-1000cc-Brembo-Rear-Brake-Caliper-/393290303534?_trksid=p2349624.m46890.l49286

[agemax]

5 minutes ago, Spazpecker said:

Like this? https://www.Eblag.co.uk/itm/1999-Ducati-St2-1000cc-Brembo-Rear-Brake-Caliper-/393290303534?_trksid=p2349624.m46890.l49286

Yes very much like that, but i want to keep it underslung at the bottom of the disc, rather than on top.

[Spazpecker]

Everyone went high mount to make them self draining / cleaner and easier to bleed.  Plenty of options on Eblag.  

 

[clivegto]

Just mount it the other way up and take it off turn other way up to bleed. I know some one that does this on this site. 

[clivegto]

Picture of smallish brembo's the older silver one is lighter than the  gold new one, they have the same distance mounting bolt spacings. I made the caliper hanger with the aid of my drill & angle grinder. 

[Dezza]

The older one should be gold: it's from the old 'Goldline' range of the mid-1980s. I bought one many moons ago from Spondon. The newer version is the budget mass-produced version now common on Italian bikes .

[clivegto]

4 minutes ago, Dezza said:

The older one should be gold: it's from the old 'Goldline' range of the mid-1980s. I bought one many moons ago from Spondon. The newer version is the budget mass-produced version now common on Italian bikes .

Old one was black when I got it. 

[Swiss Toni]

4 hours ago, agemax said:

Yes very much like that, but i want to keep it underslung at the bottom of the disc, rather than on top.

Have a word with clivegto. I sold him a 916 rear end with a Brembo caliper