77 xs650 Dual Disc upgrade

[gggGary]

7mm spacer? You could use an old junk stock disc for that, couldn't you.

Yeah but found an ebayer that sells me aluminum cutoffs near the right size so I just turn them to make the exact size I need, then drill the bolt holes, makes a fun shop project. You can see one of the spacer blanks on the scale with the FZ rotor.



Some adaptor drawings to use blue spot calipers on XS fork legs I haven't tried this yet.
Not sure where they came from now.


These have the right dims but are too thick at 10mm
https://www.ebay.com/itm/Brake-Roto...976622&hash=item1cc5d2e427:g:f4wAAOSw6AlbOPZb

This guy will cut all dimensions to your specs.
https://www.ebay.com/itm/Custom-Bra...333311?hash=item235e52b27f:g:qMAAAOSwAKxWYxB6

New rotors from China they will also need spacers.
https://www.ebay.com/itm/Front-Brake-Disc-Rotors-For-Yamaha-FZR-600-R-1989-1995-FZS-600-Fazer-1998-2003/222451163240?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649

 

[arcticXS]

Those OEM discs are even heavier than I remembered, 2.77 kg each!! That means that I must have dropped at least 5 kg or 11 lbs just from going from the OEM dual disc setup to a single 320 mm ISR disc and a Brembo 4 piston caliper. The ISR disc is bespoke, with a 23 mm offset, so no spacer is required. Then I dropped at least another 1.5 kg/ 3 lbs from the alloy fender, tacho delete, RH axle spacer, TI fasteners for disc/ caliper/ adapter plate/axle pinch, and alloy fender mounting bolts. That should be like removing a small anvil from the front wheel Definitely excited to see how the fork will work with that much un-sprung weight gone!

 

[arcticXS]

Fairly sure these would fit an XS, without a spacer:
https://www.jl-exhausts.com/300mm-floating-disc-2321-p.asp