Master Cylinders

[400sEXridr]

Does anyone know where I can find bore and stroke specs for different rear master cylinders (including street bikes and the like)? Im working on a custom off road kart and weve been using 400ex rear MCs in the past but we'd like to step up the size a little for more fluid displacement. Any advice is appreciated.

[Rich250RRacer]

I'm not sure on stroke, but nearly all Honda ATV's and dirtbikes use 1/2" bore master cylinders. It seems to be the same with all the Japanese manufacturers, since Nissin is the biggest supplier to all the brands. You can probably find something bigger on a street bike, but it's going to take some hunting.

[400sEXridr]

The past few years we've gotten free parts from Nissin directly, but not only have they turned us down for parts this year due to the economy, but theyve become quite difficult to get any good information out of about specs and other info. I just need to find some where to get some specs so we can hopefully improve on what we've got