18-01-13, 11:21 PM
well you'll need a new disk obviously. you can go for an OEM one from a yamaha dealer or a cheaper ebay jobbie. the pistons are probably sticking in the caliper because the seals need to be replaced. you get a bit of corrosion in the recess behind where the seals are located and that pushes the seals out a bit and causes the piston to stick. i'd always go for OEM seals because you're guaranteed a perfect fit with OEM ones whereas copies tend to be a bit hit and miss. you'll also need a bottle of brake fluid and some rubber grease.
replacing the seals is not too difficult. getting the stuck pistons out is probably the hardest part. you have to make sure that the two pistons come out evenly and if one is stuck you'll have to clamp the one that is moving with a c clamp and keep pumping until the stuck piston frees itself. then reverse the clamp and pump the other so that the two come out evenly. you might have to add a little fluid as you pump them out. once they're out its just clean everything, add a bit of rubber grease to the seals and pistons and then push the pistons back in with the c clamp. then bleed some new fluid through. that can be easy or a right pain
replacing the seals is not too difficult. getting the stuck pistons out is probably the hardest part. you have to make sure that the two pistons come out evenly and if one is stuck you'll have to clamp the one that is moving with a c clamp and keep pumping until the stuck piston frees itself. then reverse the clamp and pump the other so that the two come out evenly. you might have to add a little fluid as you pump them out. once they're out its just clean everything, add a bit of rubber grease to the seals and pistons and then push the pistons back in with the c clamp. then bleed some new fluid through. that can be easy or a right pain