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41
BMW Technical Q&A, Primarily R65 / Snowflake Wheels and Calipers
« Last post by Bob_Roller on April 18, 2026, 02:55:07 PM »
I've got an '81 standard R65 with ATE calipers .
In early 2007 I decided the bike needed some work done to it .
Had about 87,000 miles on it without much done other than routine maintenance performed .
Front rotors for replacement as well as pads .
I went to the EBC website and found rotors and pads effective for '81-84 R65's .
When I got the parts they weren't the correct parts .
The rotors were for composite wheels not snowflake wheels.
The pads were for Brembo calipers not ATE caliper.
You can alter pads for Brembo's to work on ATE calipers .
BMW used ATE calipers into the '82 model year until they used all of remaining stock of parts .
Sometimes even the parts catalog gets it wrong !!
42
Trading Post / WANTED: Front disc for R65 44mm offset
« Last post by Ethan F on April 18, 2026, 01:32:58 PM »
I am after a front disc for my '79 R65. It needs to be the deep offset of 44mm.
I have a shallow offset (37mm) which I would be happy to exchange. It is in good nick with 5.17mm thickness left. It is one of the Brembo ones, for those in the know and it fits various other models.

I am in southeast England.

Thanks.
43
Trading Post / Re: 1984 R65LS for sale
« Last post by wilcom on April 17, 2026, 07:28:39 PM »
ob , I'm trying to be pro active before I have to make a reactive decision. The bottom line is it's not fun anymore. I'm 81 and all my riding buddies have either hung up there leathers or are passed away. Not much fun doing it alone..............
44
Trading Post / Re: 1984 R65LS for sale
« Last post by Bob_Roller on April 17, 2026, 07:05:26 PM »
Sorry to hear you're riding career has come to an end .
I'm looking at the same scenario lots of heart issues the last year .
Ten hospital visits for procedures and ER events since May of last year .
45
BMW Technical Q&A, Primarily R65 / Re: Siebenrock 860
« Last post by Tiedie on April 17, 2026, 06:44:35 PM »
My '81 standard R65 had 145 main jets from the factory.
64/32/325, 326 carbs, may need to go a bit larger with the displacment increase .
I'm thinking that 138 were standard for the 84 LS that's why we got both and try them both out to see which works best. Glad he has a Dyno to work with.
47
BMW Technical Q&A, Primarily R65 / Re: Siebenrock 860
« Last post by Bob_Roller on April 17, 2026, 01:26:06 PM »
My '81 standard R65 had 145 main jets from the factory.
64/32/325, 326 carbs, may need to go a bit larger with the displacment increase .

48
BMW Technical Q&A, Primarily R65 / Re: Siebenrock 860
« Last post by dogshome on April 17, 2026, 07:31:24 AM »
 :lurker: :lurker: :lurker: :lurker:

 :clap:
49
Chit-Chat / Re: 82 LS
« Last post by Bob_Roller on April 16, 2026, 07:41:36 PM »
I just saw an ad on Cycle Trader for this bike .
6000 miles over $1500 in repairs done at one of the few airhead repair shops in the Phoenix area  .
Asking price $ 5500 .
I doubt he'll get anywhere near that .
I'll keep an eye on it !!
50
BMW Technical Q&A, Primarily R65 / Re: leaky flat top carb
« Last post by Barry on April 15, 2026, 08:06:33 AM »
Hi,
I have leaky carb. (1979 R65)
with the float bowel removed lifting the float to horizontal stops the flow, so does that mean my float may need replacing (I have flat tops). Does anyone know what they should weight - mine is around 18 or 19 g. I tried to test the float action by holding is in petrol but wasn't convinced this was a good technique.
Any help appreciated.
Tom


When I installed new floats I weighed them on super accurate lab scales at 12.495 Grams. Call it 12.5 grams. That was lighter than I expected as 13 grams is reckoned to be the standard weight.

You can run floats at 13/14/15 grams or even in a pinch at 16 grams but you are definitely on the slippery slope beyond 15 grams. Floats that weigh 18 or 19 grams are sinkers.

My old floats did the same as it happens also on flat tops but the fact that they are flat tops is not the issue and the floats are no different to the dome top Bings. Those Motobins floats are the correct ones .

You can install new floats with the carbs on the bike but yes it's tricky. Note the pivot pin is supposed to be driven out in only one direction because one end of the pin is serrated and you don't want to be driving the serrated end through both lugs and risk breaking a lug off.  If you look at the installed pin carefully you should just about be able to see which side is serated and then drive the pin out from the other side which might mean removing the carbs.

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