Okie
XS650 Addict
Um, not sure what that is. Is that like the "mile high club"?
Theres a sure way to earn your wings!
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Theres a sure way to earn your wings!
Old thread but raises the question of what to lubricate brake caliper rubber seals and pistons with. Some people just use brake fluid. The problem with conventional mineral oil based grease is it can swell and damage the rubber seals. What is used instead is a synthetic grease made from vegetable oil (e.g. castor oil) and goes under the generic name of Red Rubber Grease or RRG. One well known brand is Castrol Red Rubber Grease (Castrol RRG) which is compatible with DOT 3, DOT 4, Super DOT 4, DOT 4 Plus and 5.1 type brake hydraulic fluids. I used this some 30 years ago and have also used just DOT 4 and do not recall any issues. Would be nice to hear of anyone else's experiences.
Note: I have seen silicone grease advertised for this purpose but I have had no experience with this so best to just use a grease that is specifically recommended for caliper pistons and seals and is brake fluid compatible.
Note: I have seen silicone grease advertised for this purpose but I have had no experience with this so best to just use a grease that is specifically recommended for caliper pistons and seals and is brake fluid compatible.
I mostly use brake fluid for assembly lube. Do have a tube of "synthetic high temp brake grease". Me maybe but I'm pretty paranoid about grease 'round brakes. 
Bout the only place I regularly grease is inside the rubber bellows on the slider pin of 77-83 calipers. I've found that bolt dry and stuck a fair number of times.
Bout the only place I regularly grease is inside the rubber bellows on the slider pin of 77-83 calipers. I've found that bolt dry and stuck a fair number of times.
I've been using that red rubber grease and love it. I first heard about it here on the forum from our English members. It isn't readily available here in the States so I ended up sending all the way to England for a tub. It works great for any rubber lubing job. I especially like using it on the footpeg rubber mounts. It makes the brackets slide on and off very easily.
