Synthetic or Regular Brake Fluid??


Technical information and Q&A applicable to all years and models of Goldwings
  • Sponsored Links
cas82375
Posts: 2
Joined: Sat Apr 04, 2015 6:17 pm
Location: langhorne, pa
Motorcycle: 1983 GL1100A Aspencade

Synthetic or Regular Brake Fluid??

Postby 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..... :D



steve491
Posts: 12
Joined: Thu Sep 25, 2014 8:04 am
Location: Charlotte, North Carolina
Motorcycle: 1981 GL1100 Interstate

Re: Synthetic or Regular Brake Fluid??

Postby 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.

User avatar
Dusty Boots
Posts: 573
Joined: Mon Oct 26, 2009 4:25 pm
Location: Alvinston, SW ON
Motorcycle: 1992 GL1500Aspencade

Re: Synthetic or Regular Brake Fluid??

Postby 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
Posts: 2
Joined: Sat Apr 04, 2015 6:17 pm
Location: langhorne, pa
Motorcycle: 1983 GL1100A Aspencade

Re: Synthetic or Regular Brake Fluid??

Postby 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???

User avatar
newday777
Posts: 505
Joined: Tue Jan 11, 2011 5:21 pm
Location: Milford NH and Oceanside, CA (N San Diego)
Motorcycle: 2008 Cabernet Red. Level 4

1983 GL1100A Wineberry to sell 36,000 miles

1999A Restored and sold at 19,000 miles

1999SE Totaled by cager at 105,000 miles

Re: Synthetic or Regular Brake Fluid??

Postby 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.

User avatar
Ghostman
Posts: 263
Joined: Fri Aug 14, 2009 10:52 am
Location: Midwest
Motorcycle: gl1800

Re: Synthetic or Regular Brake Fluid??

Postby 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.




Return to “Tech Talk”




Who is online

Users browsing this forum: Bing [Bot] and 5 guests