I've been a member for a little over a year and even though I don't contribute much I like the forum quite well and find it a big help.
I'm in the middle of the restoration of my 1963 R60/2. The heads have been sent out to Randy Long, new spokes are on the way and the frame, front end, etc are at Barrington Motor Works for repair and powder coating. The bike has been crashed at one time and patched back together with replacement parts and not properly repaired. These issues are being addressed now. The drive train will be gone through over the winter.
Among the parts replaced are the headlight bucket and speedometer. They are both from a later model; the headlight bucket has a third indicator light on the right side and the speedometer - a 1.2, which, according to the Barrington manual, is correct for the 25/8 final drive - has the resetable trip meter - not right for a 1963 model, also according to Barrington. Since I'm just a hobbyist, I don't care enough about these parts not being correct for the year of production to spend any real money replacing them, but if someone is in the reverse position, that is, having the earlier parts on a newer bike, I would consider a swap.
While we're on the subject of speedometers, maybe someone can explain the markings on the back. At 3 o'clock on the back side is stamped 9.67, at 9 o'clock is stamped W12, and at noon, written by hand with an electric engraving pencil, is "RL over "11-80".
Thanks in advance for any input or advice.
Just guessing on the speedo info:
9.67 -- original build 9/67
W12 -- corresponds to the 1.2 ratio
RL and 11-80 -- suggests to me that in 11/80, RL overhauled it. Not sure if the speedo repair places do that as a matter of policy. Might be worth dropping one or more of them and email and asking.
If Barrington says that the trip meters didn't come in until after 1963, it's a typo. Slabon (How To Restore Your BMW - Twins 1950-1969) says that they started with the 1961 model year, and my '61 R60/2 has one, which was original with the bike. That's for the US market, at least.
The third light is the new position for the generator light on 1968 and 1969 model year bikes. The old position behind the speedometer and shared with the neutral light, became a high beam indicator.
The 9.67 stamping indicates that the speedometer was made in September of 1967; the W12 means it originally was geared with Wegezahl = 1.2, which matches what you see on the face. The handwritten notation indicates that the unit was overhauled in November of 1980. I'm not sure who RL is (Randy Long?), might be someone at one of the well known speedo shops.
Doggone it, Kurt! I had my reply all made up, but I was out on Wikipedia.de trying to find the right word that the W stands for. Wegezahl = 1.2 means that the instrument is calibrated to see 1.2 turns of the speedometer cable as representing 1 meter of travel. The W number needs to change to match the final drive ratio. Somewhere there is a list of W numbers, which range from about .75 to 1.2. The earlier /2 final drives needed W=1.12.
Very cool info,thanks KS & DR.
Aloha & ahui hou
I had my reply all made up, but I was out on Wikipedia.de trying to find the right word that the W stands for.
Well, you went the extra mile on the reply. I didn't even think about what the W stood for...I've learned something!!
Just in case it isn't clear:
Darryl has suggested this before. If you end up getting the headlight bucket repainted, he suggested painting the inside white. That makes it much easier to see what's going on whenever you have to dive in there.
I believe that all US market bikes from the 1961 model year onward were delivered with a trip meter. In Germany, with kmh speedometers, trip meters were an extra cost option. Perhaps this was also true for bikes delivered with mph speedometers for the UK, but I can't say for certain.
Great thread. I literally just purchased a speedo for my 1950 r25 off ebay and I just went with the listing saying it fit r25-r25/2. I don't have the barrington book yet, could someone please let me know the correct ratio for my bike? In the ebay listing it appears to be a 1.0.
2nd attempt...ISE... The Barrington manual only shows the twins back to 1955. An old VMCA News shows the R25 and R25/2 (solo and final drive of 27:6) using the 1.05. The 1.0 was indicated for use (solo and with the 25:6 drive) on the R25/3, R26, and R27.
Thanks! I'll see if I can verify that somewhere definitively, but that sounds right, given the change in final ratios.