| Author | Message | ||
     Bent_mind |
Went to local dealer today to get brake fluid to bleed and refresh the system. the parts guy came back with dot 5, telling me it's better than dot 4. I intend to get some dot 4, but am curious about the results of trying to use dot 5 in a dot 4 system. Couldn't find a specific answer in the KV | ||
| Mikej |
Take it back and tell the clerk to get educated, 4 and 5 do not interchange, and doing so can have drastic consequences to the seals in your bike's brake system. link http://www.356registry.org/Tech/brake_fluid.html | ||
| Mikej |
Here's another link: http://www.carbibles.com/brake_bible.html
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| Xldevil |
Do you realy think,that Buell used other seals as before 2000 in their brake systems,when they changed from DOT 5 Systems, to DOT 4 ? It is correct,that one can not fill a DOT 5 System with DOT 4.That would destroy the seals in a DOT 5 intended system. Otherwise,while DOT 5 is not corrosive,you can take it as a substitute in a clean DOT 4 System.It will not hurt the seals. On the downside,DOT 5 is a little more compressible.That could cause the pressure point to feel soft. Regards,Ralph (Message edited by xldevil on November 23, 2005) | ||
| Oldog |
Are you sure of that Either I am miss interpreting some of the data above or it says NOT to interchange, IE if the system says D4 use D4, If D5 use D5, there are compatibility issues with the soft parts DO NOT USE D4 IN A CLEAN D5 AND VS A V | ||
| Rocketman |
Old, what Ralph is saying is one can use Dot 5 in a Dot 4 system providing Dot 4 has NOT been used previously. His point is that the system internals required for Dot 4 (seals etc) are compatible with Dot 5 fluid. This will not be the case though if Dot 4 had previously been introduced to the system. Rocket | ||
| Fullpower |
Bent mind: the simplest possible answer is "DO NOT PUT DOT 5 fluid in your Buell" | ||
| Xldevil |
Simple,but false. Regards,Ralph | ||
| Rocketman |
TO BE CLEAR - DOT 5 IS USED IN SOME BUELL APPLICATIONS. Make certain yours isn't one of them if you use anything other than DOT 5. Rocket | ||
| Oldog |
Rocket: that is not what I read in the above posts DOT3/4/5.1 and DOT5 fluids cannot be mixed or interchanged under any circumstances Also: the silicon based fluids can destroy the seals in brake systems which rely on the moisturiser additives that are present in DOT3/4/5.1 fluids. I have never seen a listing of the rubber type for the orings in our brake systems so I can't refute the information above, use of d5 in a clean d4 system I can't refute either, I do value the hide on my arse so for the money I might save using D5 I use D4 because, its whats marked on the cap its commonly available, it will be changed every year and the system overhauled every 4 per factory specs. As I sit here and think about an above post let me ask you, Your S1 has the PM calipers?, and is marked for D5? fluid? I cant prove it but it makes sense that the rubber parts may be different from the Nissin parts on my x1 not just dimmentionaly, but in the compound of the rubber as well, depending on whats used materials that work with D5, may work with D4 but Not Vis A V On another Note I have been waiting for you to post a pic of your finished S1 | ||
| Rocketman |
Old, DOT3/4/5.1 and DOT5 fluids cannot be mixed or interchanged under any circumstances. What Ralph was trying to explain is that DOT 5 should do no harm to the components inside a DOT 4 system PROVIDING the DOT 4 system has never seen DOT 3, 4 or 5.1 fluid EVER. Ralph also explained that DOT4 used in an intended DOT5 brake system will damage the seals in such a system. As for my S1, I don't have one. I do have a 1998 S1W and it has Nissin brakes using DOT5 fluid. You haven't / won't see any pictures of it (yet) because I've not 'finished' it. It's true, she's back on the road after a 3 year lay up but this time around I'm wanting to crown the glory with some items and modifications that I wanted to do years ago. That's the point, for now, where I'll consider her finished. When I've reached this point I'll post pictures and tell a story to accompany the pic's. Stay safe with your brakes. Take non of my advice and DO follow the manufacturers instructions. My efforts were simply to clarify words and sentences put together by someone who I shared an understanding with about the use of certain brake fluids. I might of course be wrong. Rocket | ||
| Bent_mind |
Fullpower; obviously. I never intended to put dot 5 in, was only posing the question. I learned the brake fluid compatibility lesson years ago with dot 3 in a Girling system. |
