I was chasing a leak in the rear drive of my '86 R65 (it turns out it may have just been a weeping fill-level plug) and so ordered the various seals/gaskets/o-rings. The o-rings on the rear brake cam (21) were standard looking ones that fit in a groove. The ones that were sent are very thin and larger diameter. Looking at the fiche I came across this (item 20):
There are two item 20s listed.
20 O-ring 10X2 2 07119906328 $0.13
20 Gasket ring 12X1 2 35211457605 $1.32
The o-rings on the shaft (21) were definitely the 10x2 and there were no others. Does anyone know anything about the 12x1 'gasket rings' . Are they an alternative to the o-rings or should they all be fitted and, if so, where? Motobins only list the 12x1 as being for my bike.
Cheers
Ray
Rear brake o-rings
Rear brake o-rings
1986 BMW R65
2008 Moto Guzzi Breva 750
2019 Kawasaki Z900rs
2008 Moto Guzzi Breva 750
2019 Kawasaki Z900rs
Re: Rear brake o-rings
Both my 1981 and 1983 R65s have a felt "gasket ring" which is most likely the 12x1 item.
BMW mothership expects the felt to absorb the final drive lube that always seems to find a way out.
BMW mothership expects the felt to absorb the final drive lube that always seems to find a way out.
1981 R65
1983 R65
1978 R100S
1995 Triumph Trophy
1983 R65
1978 R100S
1995 Triumph Trophy
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- Posts: 129
- Joined: Fri Sep 03, 2010 6:37 pm
Re: Rear brake o-rings
Harbor freight sell a box of o-ring assortment made of nitril rubber. Part of that assortment is 10qty 9.8 x 2.4 rings. You can make them fit
Leaks there usually caused by overfilling
Leaks there usually caused by overfilling
Re: Rear brake o-rings
Number 18 in the diagram is the felt 'gasket ring' (19 is a washer). I have one on mine too, on the right-hand outside of the final drive under the brake lever. The o-ring that puzzles me is very thin (1mm) and the same diameter as the shaft (12mm).
I picked up some 10x2 o-rings from a local car parts shop. Thanks for the suggestion about the Harbor Freight assortment but their nearest store is a fair way from here.
I picked up some 10x2 o-rings from a local car parts shop. Thanks for the suggestion about the Harbor Freight assortment but their nearest store is a fair way from here.
1986 BMW R65
2008 Moto Guzzi Breva 750
2019 Kawasaki Z900rs
2008 Moto Guzzi Breva 750
2019 Kawasaki Z900rs