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Author Topic: Final Drive; Leaking oil  (Read 1414 times)

Offline Julio A.

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Final Drive; Leaking oil
« on: May 16, 2010, 07:32:55 AM »
I noticed some oil leaking in between the Final drive and the rear wheel.

This is giving me some worries since I have just replaced the Oil seal on the final drive last september, I also did use some gasket maker before sealing it up properly. I was leaking pints back then; the rear brake and wheel would be drenched in oil and oil would come out of the drain hole for the rear brake.

It's definitely gear oil because of the smell, could be possible that there could be another source of that leak but I don't know where else to look.
Julio Alarcon
1981 R65
1976 R90/6
2001 R1150 GS/ADV
2015 TR650

Online Bob_Roller

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Re: Final Drive; Leaking oil
« Reply #1 on: May 16, 2010, 07:59:48 AM »
Common problem with these bikes, the o-rings on the rear brake camshaft, are most likely the cause .
'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline montmil

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Re: Final Drive; Leaking oil
« Reply #2 on: May 16, 2010, 11:09:26 AM »
Quote
Common problem with these bikes, the o-rings on the rear brake camshaft, are most likely the cause .

Cured my gear oil leak! Got really tired of having 80/90 wt gear oil on the rear tire. Whoopeeee!

Pull the rear wheel and pop off the brake shoes. Remove the brake arm from the brake cam shaft and slide the shaft out. Some R65s have two (2) O-rings and others have four (4). My '81 is a deuce while the '83 is a quad. There is also a felt washer between the final drive's exterior case and the brake arm.

Order extra O-rings and a couple felts. I believe I paid $0.50 each for the O-rings. And good ol' BenchMark took a credit card for a less than $5.00 charge. Guy I talked with said "no biggie we'll you sell whatever you need". I liker that kinda service and attitude.

Ring Vech at http://www.benchmarkworks.com/ He's the man on these odd sized O-rings.

Monte


Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet