Jaydela180
XS650 Addict
Mocking up brembo on 35mm forks with stock rotor. Rotor seem awfully close to inside of fork.... just a couple of mm. Is that normal? Anyone have a measurement to share?
Thanks in advance.
Thanks in advance.
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Brembo conversion rotor to fork clearance
- Thread starter Jaydela180
- Start date
It will be close yes. I'm not using a stock rotor but using a rotor spacer to create the same offset. Member Glennpm, I think that's it, ended up with about 1.25 mm between rotor and forks. I just got mine all squared up this weekend. Here's a video showing clearances....
https://vimeo.com/165070909
https://vimeo.com/165070909
If you are using a non-floating caliper, like a 4-piston Brembo, Yamaha"Blue Spot" or similar, the disc will have to be close to the fork slider.
On my 1977 XS, I ordered a custom ISR 320 mm disc with 23 mm offset. This is effectively the same as the popular 320 mm Brembo from Ducati (10 mm offset) plus a 13 mm spacer. In any case, the disc floater buttons will have 1-2 mm clearance to the fork slider.
I got a custom made disc to avoid the weight and added complication of a spacer and longer bolts.
On my 1977 XS, I ordered a custom ISR 320 mm disc with 23 mm offset. This is effectively the same as the popular 320 mm Brembo from Ducati (10 mm offset) plus a 13 mm spacer. In any case, the disc floater buttons will have 1-2 mm clearance to the fork slider.
I got a custom made disc to avoid the weight and added complication of a spacer and longer bolts.
Jaydela180
XS650 Addict
Thank you both. Exactly what i needed.
Jaydela180
XS650 Addict
Mag wheels. Clearance good there. Just got everything centered and lined up. Think im good.
Heres one for ya: What brake fluid was running through these calipers? Collapsed pistons and out came yellowish clear. Is that 3/4 or 5?
Heres one for ya: What brake fluid was running through these calipers? Collapsed pistons and out came yellowish clear. Is that 3/4 or 5?
glennpm
Another Old Biker Nut!
If your brake fluid looks yellow or yellow/brown, its time for you to change it. Yellow is not good (don't eat yellow snow!).
DOT 4 has a higher boiling point than 3. Use DOT 4 which is readily available or 5.1. DOT 5 could damage your seals.
https://en.wikipedia.org/wiki/DOT_5
and from Summit racing:
" What is the difference between DOT 3, DOT 4, DOT 5, and DOT 5.1 brake fluids?
DOT 3, DOT 4, and DOT 5.1 brake fluids are glycol-based compounds that are compatible with one another. On the other hand, DOT 5 brake fluid is silicone-based and should never be mixed with any other type of brake fluid. DOT 3, DOT 4, and DOT 5.1 brake fluids will damage painted surfaces. DOT 3 and DOT 4 fluids have lower boiling temperatures than DOT 5 and DOT 5.1. Furthermore, DOT 3, DOT 4, and DOT 5.1 fluids are hygroscopic--they absorb moisture from the air. This causes the fluid to turn dark, indicating that it is time for the brake fluid to be replaced. DOT 5 fluid will not damage paint, has a boiling temperature in excess of 500 degrees F, and is not hygroscopic."
DOT 4 has a higher boiling point than 3. Use DOT 4 which is readily available or 5.1. DOT 5 could damage your seals.
https://en.wikipedia.org/wiki/DOT_5
and from Summit racing:
" What is the difference between DOT 3, DOT 4, DOT 5, and DOT 5.1 brake fluids?
DOT 3, DOT 4, and DOT 5.1 brake fluids are glycol-based compounds that are compatible with one another. On the other hand, DOT 5 brake fluid is silicone-based and should never be mixed with any other type of brake fluid. DOT 3, DOT 4, and DOT 5.1 brake fluids will damage painted surfaces. DOT 3 and DOT 4 fluids have lower boiling temperatures than DOT 5 and DOT 5.1. Furthermore, DOT 3, DOT 4, and DOT 5.1 fluids are hygroscopic--they absorb moisture from the air. This causes the fluid to turn dark, indicating that it is time for the brake fluid to be replaced. DOT 5 fluid will not damage paint, has a boiling temperature in excess of 500 degrees F, and is not hygroscopic."
Here is a solution that requires no spacer, is lightweight, looks fantastic as well!
http://www.jl-exhausts.com/jl-brake-disc-352-c.asp
http://www.jl-exhausts.com/jl-brake-disc-352-c.asp
Mexiwop
XS650 Enthusiast
i have an 82 special. i have the floating rotor from mikes and installed the pandamonium spacer behind it. mounted the caliper bracket. brembo gold caliper (did not file the area where the brake pads go) i did file the mount ear numbers so pads/bracket can sit flush, and the back side of the piston area. tried to mock up and this thing seems to be at least a 1/4" off (spacer to thin?) it appears the spacer in the vid is a lot thicker than came with my kit. do i have the wrong one? or do we have to make one when we run a non stock rotor. i did order a 35mm kit (i think) any help is always appreciated
Yes, the spacer from Pandemonium is 4.5mm, it's not nearly thick enough. The spacer I used is 10mm plus additional shims behind the spacer to make it 13mm offset....I have a recent thread discussing this in more detail. I'll bump it for you.
