1980 KZ 1000 B4 LTD 1327 Build

Thanks everyone, Ya the extra hp is a blast its like riding the old kaw for the first time and your like damn. Burnouts at a little blip of the throttle. Still getting used to the power tho. Its a complete whole other experence compared to the 1075 motor. I actually have had them bars on there since i bought it. I really like them and the way they look. The only downfalls are that they are harder on your wrists and back and the it puts everything on the bars really close together. I actually made a spacer plate to space the headlight out to give me a little extra room. The bike was already painted so i left it, but i really do like the color myself. They also put a flame design under the paint. you can kinda see it in the picture above.

Well i thought everything was good but i was out riding and my rear caliper hung up. The piston must of stuck out. I was riding and just felt it slowing the bike down. I let it sit a few then i would move again but it was still draging. so i stoped and got a pair of pliers and let the bleeder loose but it didnt really have alot of pressure like normal. So do you think the piston will be harmed? I will rebuild the caliper just wondering if i should get new piston?

I wouldn't think u need to replace the piston. All three of my calipers were stuck. Soaked them w pb blaster and blew them out w about 90psi of air. Wrapped them n a towel first cause they come out pretty fast!! Anyway, cleaned them with some emory cloth and put in the new kits. A little vasoline made them go together easy. sorry for busting ur thread earlier by the way! U have an awesome bike. Wish mine was that nice

Thank you, I actually think i figured out where i messed up. I was orginally told by a friend that the busa took dot 3 brake fluid. Turns out its dot 4. So That might be whats causing me problems. So my next question is after a fresh rebuild will i be able to run dot 3 fluid and the caliper be ok?

Not sure on the fluid but I don't think it was the cause of your problem. Air in the system will cause a caliper to stick if I remember right. The air heats up,expands and pushes the puck out.
Wayne

Not sure on the fluid either. Any chance of moisture in the caliper? Mine were stuck from being off the bike for a while wo fluid in them. The pistons had some very light rust on them and the seal was dry n crusty

As far as I understand the different brake fluids, it has to do with breaking down the rubber parts in the system. Don't think that is your actual issue.

If you have the piston out, it may be of some benefit to polish it. There are SOME gains to be made in brake performance in this area.

Personally, I would go with the factory reccomended brake fluid.

My .02 FWIW

Steve

Powerstroke_fan wrote: Thank you, I actually think i figured out where i messed up. I was orginally told by a friend that the busa took dot 3 brake fluid. Turns out its dot 4. So That might be whats causing me problems. So my next question is after a fresh rebuild will i be able to run dot 3 fluid and the caliper be ok?

DOT 3 or DOT 4 will work fine; they are compatible. DOT 5 is not. Ed

I havnt did much to it yet, I rebleeded the line and its working correctly again. So well see how it holds up.