lesliek
Guest
Would appreciate it if anyone can shed some light on the correct U-bolt size for the R12GS. Don't have a caliper available and eyeballing it with a ruler just seems too iffy. Many thanks.
bum125
Guest
lesliek said:
Between the clamps it's 1.1" (28mm) & it tapers down to .88" (22.5 mm) at the switches. The Ram clamp on ball part # B-231 fits from 3/4" to 1" and should work OK just a little way up from the clamps. Hope this helps.
lesliek
Guest
Perfectly! Thanks a bunch! 
Dave Price
Guest
I used this one on my 12GS. Fits neatly between the clamps in the centre RAM Part: RAM-B-108B.
RAM-man
depleted member !
The RAM-B-231Z (part of RAM-B-149, 149Z, 149ZA) will fit handle bars from 3/4" to 1". The U-bolt bracket has elongated slot could you can prise the U-bolt apart for oversized bar (but I have yet to see this on a BMW).
For cross-bar rail mounting (approx 1/2") , then add a RAP-319 to the above RAM B-231Z (part of RAM-B-149, 149Z, 149ZA). See GPS info thread on cross-bar mounting
There some images in GPS info where a GPS has been attached onto a
1200GS (again using RAM B-231Z (part of RAM-B-149, 149Z, 149ZA).
The RAM-B-108B is another option as the saddle sits on the curved rail and is held by a clip up to 2" dia. Then the Boxertrix boyz (1100S) tend to use the RAM-B-121B Yoke clamp around the ignition barrel or a RAM-B-252 on the tank bolt.
RAM-man
For cross-bar rail mounting (approx 1/2") , then add a RAP-319 to the above RAM B-231Z (part of RAM-B-149, 149Z, 149ZA). See GPS info thread on cross-bar mounting
There some images in GPS info where a GPS has been attached onto a
1200GS (again using RAM B-231Z (part of RAM-B-149, 149Z, 149ZA).
The RAM-B-108B is another option as the saddle sits on the curved rail and is held by a clip up to 2" dia. Then the Boxertrix boyz (1100S) tend to use the RAM-B-121B Yoke clamp around the ignition barrel or a RAM-B-252 on the tank bolt.
RAM-man
