I also changed the transmission and drive shaft fluids using Valvoline synthetic 75w90 oil, and I changed the fork oil. I also installed a Westco sealed battery and replaced the coil with a new BMW unit.
The bike also has new steering head bearings and speedo cable installed by Bob’s BMW. The bike handles great and revs like a champ — it’s a true joy to ride. See my other Airhead, an ’84 “Last Edition” BMW R100RS (since sold).
R65 Exhaust Systems
Boxup has Keihan exhausts for the R65 and R80 monoshock and others (Germany) | Keihan in England manufacturers exhaust systems for the R65 and other BMWs
Gerry B.’s tips for a replacement brake light switch for a BMW R65 – “I needed a new hydraulic brake light switch for the front brake on my 79 R65. (I heard that there is a) VW substitution.
I checked the IBMWR substitution page and found a message from Andrew Clark that says: for R100/7 “Front brake switch – identical to the two prong brake switch used on all 12 Volt air-cooled and early water-cooled VW’s”.
Three prong switches can also be used, just find the two prongs without continuity to connect the two wires to.”
I bought a switch a a local Advance Auto. It is for a 1963-1970 VW Part: GP Sorensen 37-5036 It is two prong and identical to the old switch. There was a good large picture of it on the Advance Auto fiche.
At another local parts shop and there were two Bosch switches listed: Bosch 0344004001 VW 70-63 Bosch 0344004003 VW 91-61.
The pictures were very small in his paper catalog. Looked to me like the first one 0344004001 VW 70-63 is the correct part.
Installation was easy once I was able to fit the socket wrench with extension into the limited work space. Old one was in there very tight. I replaced it as soon as I got it out and there were just one or two drops of fluid to clean up. I don’t think I will have to bleed the brakes — thank you very much.”