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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Rickman on September 03, 2013, 10:11:00 AM

Title: K75s Fork Oil
Post by: Rickman on September 03, 2013, 10:11:00 AM

I've been doing really early Honda's for years and always used automatic transmission fluid for fork oil with great results. This is my first BMW, can I use this with my K75s when I change the fork oil?

Title: Re: K75s Fork Oil
Post by: johnny on September 03, 2013, 11:07:58 AM

I have used atf in the forks... was yeeeeeehaaaaaa before during after...

j p

Title: Re: K75s Fork Oil
Post by: mjydrafter on September 04, 2013, 10:37:40 AM

Back in the day ATF was used as fork oil.  It's probably fine, but... :hehehe

How much is a QT of real deal fork oil?    :dunno2:

I would use more modern fluids designed for suspension work. The biggest problem I have seen with modern ATF is that the viscosity is all over the map, from 5-10wt.  And it's not really advertised with a viscosity.  (now I'm sure you can find it on the MSDS, or BITOG's forum), but why, when you can get real suspension fluid, probably around the same price as a good ATF, and you will know the viscosity.  I think this is important, if you are trying to fine tune your forks and want to try different viscosity's to change the forks character.

If it were me, I wouldn't hesitate to use ATF, in an emergency situation.  But for all others I would just get a QT of fork oil, IIRC a QT will do around 3 fork legs...