Front Master Cylinder Question

Hey, bought an old bike thats not running....the front brake master cylinder has a peep hole for seeing the fluid level...well that is broken. I couldnt find a replacement for that..is there one out there. If not can i use one off of a ninja like this....... CLICK HERE

Thanks

that type of master cylinder is for the new style of radial brakes it probably wont work well for your stock brakes the calipers are 4 or 6 or 8 piston where yours are 2 piston it will give you to much braking force they would be very touchy to say the least.