Well in the spirit of 1 step forward and 2 backward….. Yesterday, I got around to rebuilding the rear master cylinder on my 06 450 Sportsman. This machine has been sort of a project as I purchased it over a year ago, low hours but plenty of neglect and it needed quite a few repairs. The rear emergency brake never worked and the master was leaking fluid. Got the master all set and re-installed, went to bleed at the caliper…no problem, got all the air out but the nipple would not tighten. Removed it completely and pieces of aluminum thread came out with it. I know they make nipple repair kits for cars and Harley’s. My first thought is to use a heli coil. does anyone know the nipple thread? Looks like 1/4-28.. Any advise would be appreciated as I really hate to buy a new caliper as they are at least $175.00.