The member photo gallery is now integrated and live!!  All user albums and pictures have been ported from old gallery.


To register send an e-mail to admin@bmwr65.org and provide your location and desired user name.

Author Topic: Exhaust clamp  (Read 1689 times)

disco51

  • Guest
Exhaust clamp
« on: May 01, 2014, 09:40:51 AM »
Just want to quickly verify a part as I can't seem to find a picture.  Does the OEM exhaust clamp have a 38 stamped on it?
Mine doesn't seem to hold down after completely tightened and my new cheap aftermarket mufflers keep rattling backwards.  I was thinking of ordering a new one from Max, but there is no picture and don't want to order the same one I have.

Offline Barry

  • Mt. Olympus Resident
  • ****
  • Posts: 5145
Re: Exhaust clamp
« Reply #1 on: May 01, 2014, 09:56:37 AM »
Exhaust pipe size for R45/R65's is 35mm  

38mm is the size most often used on other airheads. You may have 38mm mufflers although sometimes they provide a sleeve to match smaller pipes.

Not sure what it says on my clamps but I can have a look when I get home.
« Last Edit: May 01, 2014, 10:00:27 AM by bhodgson »
Barry Cheshire, England 79 R45

disco51

  • Guest
Re: Exhaust clamp
« Reply #2 on: May 01, 2014, 11:28:08 AM »
Aha!  That would make sense.  Complete lack of me referencing previous posts....  (sorry Monte - forgive my laziness this one time).
I'll order the ones off the fiche.  
Thanks Barry

Offline Barry

  • Mt. Olympus Resident
  • ****
  • Posts: 5145
Re: Exhaust clamp
« Reply #3 on: May 01, 2014, 01:19:27 PM »
Hang on I've just checked mine and they also say 38.  It must refer to the outside diameter of the muffler and not the size of exhaust pipe the muffler is designed to fit.  

My clamps are stainless and almost certainly the original ones if that helps identify what you have.
« Last Edit: May 01, 2014, 01:21:44 PM by bhodgson »
Barry Cheshire, England 79 R45

AlfromNH

  • Guest
Re: Exhaust clamp
« Reply #4 on: May 01, 2014, 04:01:50 PM »
I recently bought a pair of clamps from Max($18 each!). I can snap a picture if you'd like.

disco51

  • Guest
Re: Exhaust clamp
« Reply #5 on: May 01, 2014, 09:12:21 PM »
A pic would be great.  Just can't seem to get them to snug down on these aftermarket pipes.

AlfromNH

  • Guest
Re: Exhaust clamp
« Reply #6 on: May 02, 2014, 06:27:54 AM »
Here ya go...




Offline montmil

  • Mt. Olympus Resident
  • ****
  • Posts: 8371
Re: Exhaust clamp
« Reply #7 on: May 02, 2014, 07:36:00 AM »
If memory serves, I think the "38" is the maximum useable diameter, in millimeters, that the clamp screw will support. I have an extra clamp which I ordered that turned out to be too big.

I do like the BMW OEM-style clamps. Don't like seeing radiator hose clamps on motorcycle exhaust systems. Especially on our Airheads.
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline Bengt_Phorqs

  • Mt. Olympus Resident
  • ****
  • Posts: 1419
  • There are no wrong turns on a motorcycle
Re: Exhaust clamp
« Reply #8 on: May 02, 2014, 07:53:39 AM »
A shade tree solution to the too large clamps is to cut shims from an empty aluminum can of barley juice.  Easy to do with metal shears and the preparation of raw materials can also be satisfying.   [smiley=beerchug.gif]
« Last Edit: May 02, 2014, 07:54:01 AM by Bengt_Phorqs »
Bengt Phorqs, Jake R90/6, R80/7, R1200RTw, Moto Guzzi California EV , Triumph TR250W, Yamaha TY250A Trials, Suzuki DR650

Offline montmil

  • Mt. Olympus Resident
  • ****
  • Posts: 8371
Re: Exhaust clamp
« Reply #9 on: May 02, 2014, 08:47:56 AM »
That's my riding buddy. Recycling. Outstanding, Crunch! ;D
Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet