Re: 954RR front brake fluid/performance problem
pads are stock and pretty new.
here is some info from belray page.
Q: Sir Tech,
My bike’s brakes are currently filled with DOT 4. Is it true that I will get better performance if I switch to Bel-Ray Silicone DOT 5 Brake Fluid?
A: No, Years ago, many road race teams used DOT 5 silicone brake fluid to get higher boiling points than the DOT 3 & 4 brake fluids of that era. Since DOT 5 silicone is not hydroscopic, meaning it won’t absorb water, it retains its high boiling point over time. On the other hand DOT 3, 4 and 5.1 brake fluids that are glycol based are hydroscopic and do pull in water which then lowers the boiling point. That is why you will see wet and dry boiling points, with the dry boiling points always being higher. Glycol based brake fluids may start out with a fairly high dry boiling point but as they absorb moisture the boiling point decreases. So every time your brakes get really hot and then cool, condensation occurs and moisture is absorbed. That is why it is important to replace your brake fluid regularly. It may seem obvious that DOT 5 silicone is the best choice, but not so. Today most road race teams use DOT 4 or DOT 5.1 glycol based brake fluids because the dry and wet boiling points today are very high and in some cases higher than DOT 5 silicone. The number one reason not to use DOT 5 silicone is a slightly mushy lever or pedal feeling as compared to glycol based brake fluids. This is the nature of the product. Street riders may not feel the difference, but the race teams prefer the precise feeling of glycol. The only motorcycles that I know of rolling off the production line with DOT 5 silicone are Harley-Davidson® and other American made motorcycles; and that is mainly where we sell our Bel-Ray Silicone DOT 5 Brake Fluid. I recommend you stay with the DOT 4 fluid for performance, not to mention the enormous job it is to switch your system over from glycol to silicone. If that job is not done properly, you run the risk of coagulation if remnants of DOT 4 are mixed with DOT 5 silicone. I hope that’s not too much for you at once. Maybe you should read half, take a play break, then read the rest.
"So every time your brakes get really hot and then cool, condensation occurs and moisture is absorbed"
From another page I found that the tanned color indicates how much water the fluid has absorbed. When it's new it's clear and it gets darker when it absorbs water.
I'm gonna get better quality fluid and change it often. At least when it's gets tanned.