| I found out to my cost with my race bike that copper grease can cause lots of problems with caliper seals - they swell, it cause pistons to stick and this boiled the fluid and glazed the pads. I started using red rubber grease from Castrol and that almost totally solved the problem. I only use the copper stuff on pins now. In the case of Ducati calipers I use nothing - I just keep them clean. If your pistons are sticking badly then the chances are that the seals are fugged - they may have swelled due to all the cleaning materials you have used. |