brake calipers commander

[biker bob]

hi I'm a new member ( biker bob)could any body tell me which yamaha motorcycle has the same front and back calipers as my 1989 commander. my ones has seize up not turned a wheel in 15 years. many thanks bob.

[Richard Negus]

Welcome biker bob,Calipers are Yamaha XJ900F, about 1987-88.You can, or could, get new pistons and seals kits for them.It's usually the outer seal groove that corrodes and makes the piston sticky. Scrape the grooves very well before re-assembling with lots of grease.You may of course be lucky and have callipers that were hard-anodised by Norton; it gives greenish tinge to the machined surfaces and slows the rate of corrosion. Don't lose the square-section rings between the caliper halves - it's not included in the seals kits.R.

[biker bob]

thanks richard for that information many thanks bob.