Brake fluid types within 3-4

[whatscooking]

Was wanting to change the brake fluid in a bike I have. Need to use DOT 4 my shop manual says, do NOT use a silicone based fluid only glycol. I know the DOT 5 is a silicone base but on the bottle of 4 I have on my shelf is states it is a silicone base. This has me worried the flushes I have done on some of the other equipment I have flushed, Kubota RTV, Honda four wheeler, and other motorcycles i might of messed up.

[steve murdoch icoa #5322]

Never heard of a silicone based Dot 4.
If you have indeed mixed the glycol and silicone based fluids together i would flush and rebuild the m/c, lines and calipers.
From what i have read the seals can swell and the fluid can gel.
I use Belray Dot 4 in all the bikes.
https://www.motorcyclistonline.com/mc-g ... -explained

[whatscooking]

I just returned the little bottles to Wally World for a refund, they were in a Prestone bottle, look them up on E-bay and you will see both DOT 3 and 4 are marked synthetic. I too thought this about Dot 3 and 4 brake fluid.

[whatscooking]

My bad, I was crossing the synthetic, silicone for some reason, glad as I was facing a bunch of brake problems.

[cross]

I use ATE TYP200 DOT4 in all my bikes. It has higher temp rating. Little pricey though

[Larry Zimmer]

DOT 4 good stuff. One bottle should do a brake job.