Synthetic or Regular Brake Fluid??

cas82375 · Post by **cas82375** » Tue Apr 07, 2015 11:41 am

1983 Aspencade GL1100, Need to know if it is ok to switch to Synthetic? Any help would be great.. Thanks.....

steve491 · Post by **steve491** » Tue Apr 07, 2015 12:34 pm

I think you mean Silicone based brake fluid (DOT 5 or newer). The two are not compatible. I would use any DOT 3 or 4.

Dusty Boots · Post by **Dusty Boots** » Tue Apr 07, 2015 12:54 pm

Yes, you can use synthetic DOT 3/4 brake fluid with your bike and have no compatibility issues!

cas82375 · Post by **cas82375** » Fri Apr 17, 2015 9:17 pm

Dusty Boots wrote:Yes, you can use synthetic DOT 3/4 brake fluid with your bike and have no compatibility issues!

thanks, also will the synthetic harm any of the rubber seals???

newday777 · Post by **newday777** » Sun Apr 19, 2015 3:14 am

Synthetic Dot4 will do no harm. It has a higher boiling point than Dot3, so it is much better.

Ghostman · Post by **Ghostman** » Sun Apr 19, 2015 10:44 am

All DOT3,4 and 5.1 brake fluid is synthetic (polyglycol and glycol ethers)base. Boiling points are due to each brands formula of additives. DOT 5 is silicone based and shouldnt be mixed at all. Some HDs use DOT 5.

Synthetic or Regular Brake Fluid??

Synthetic or Regular Brake Fluid??

Re: Synthetic or Regular Brake Fluid??

Re: Synthetic or Regular Brake Fluid??

Re: Synthetic or Regular Brake Fluid??

Re: Synthetic or Regular Brake Fluid??

Re: Synthetic or Regular Brake Fluid??