Rear Disk Upgrade

[Ozboy]

Just finished my front Disk Upgrade by putting a lighter drilled Disk on. Ditched the dual disk for single Disk and Brembo. So now I am looking for something on the rear that bolts on. Keeping stock calipers but lighter drilled rotors would be nice. I have done a search but nothing yet. I know they are 267mm. Anyone done one and know of one?
Cheers

 

[ThatXS650Guy]

I've done it.
I used a rear caliper holder from an XS1100. I had to modify the brake stay mount a little and use some spacers but it went together fine.
Mine's a little odd since I also have the XS500 rear wheel.

 

[Ozboy]

Wow very nice!

 

[arcticXS]

For an underslung caliper, this setup is hard to beat with regards to weight:
http://isrbrakes.se/products/calipers/22-029.html

 

[XSLeo]

Do you have a disc on the rear now? If so just drill what you have with a pattern to match the front.
There are not many disc rear wheels that are a straight up bolt in. The XS650 disc cast wheel is about the only that is. Most others need some mods to work.
If on a stock bike it's not work the work. Just tune up the drum brake.
On a bike that has been hardtailed then the swap isn't so bad. Hardtails can be altered to fit a wider wheel easier than the stock swingarms and have more room to mount the M/C.
Leo

 

[Mike G]

I used one from a Maxim, it’s 5mm thick vs 7mm stock and slotted so much lighter.

 

[Ozboy]

Nice one thanks.

 

[gggGary]

Haven't tried one of these but suspect a big weight saving.
https://www.ebay.com/itm/267mm-Rear-Round-Brake-Rotor-fit-Yamaha-XS360-XS400-SR500-1977-1978-1979/261901137165?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649
oops another, cheaper and in Sillyfornia already.
https://www.ebay.com/itm/Front-Brak...a=0&pg=2047675&_trksid=p2047675.c100005.m1851

 

[Ozboy]

Awesome thanks gggGary looks good and it may work. Shipping kills me down here but I can start searching.