1981 R100RS Diaphragm Spring Height

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Major Softie
Posts: 8900
Joined: Tue Aug 03, 2010 1:46 pm

Re: 1981 R100RS Diaphragm Spring Height

Post by Major Softie »

kutter wrote: The throttle needle in the air slide needs replacing
as it has a couple of wear marks on it. The rest of the internals are ok.
If the needles are worn, replace the needle jets as well.

Eastwood and Harbor Freight carry soda in 50 lb. units.
MS - out
Deleted User 72

Re: 1981 R100RS Diaphragm Spring Height

Post by Deleted User 72 »

Major Softie wrote:
kutter wrote: The throttle needle in the air slide needs replacing
as it has a couple of wear marks on it. The rest of the internals are ok.
If the needles are worn, replace the needle jets as well.

Eastwood and Harbor Freight carry soda in 50 lb. units.
He's in Oz. Are they?
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SteveD
Posts: 4941
Joined: Tue Aug 03, 2010 3:29 am
Location: Melbourne, Oz.

Re: 1981 R100RS Diaphragm Spring Height

Post by SteveD »

Native /5 wrote:
Major Softie wrote:
kutter wrote: The throttle needle in the air slide needs replacing
as it has a couple of wear marks on it. The rest of the internals are ok.
If the needles are worn, replace the needle jets as well.

Eastwood and Harbor Freight carry soda in 50 lb. units.
He's in Oz. Are they?
Nope. A major hardware chain like Bunnings might have a similar product?
Cheers, Steve
Victoria, S.E.Oz.


1982 R100RSR100RS supergallery. https://boxerboy81.smugmug.com/R100RS
2006 K1200R.
1994 R1100GS.
Roy Gavin
Posts: 400
Joined: Tue Aug 03, 2010 11:21 pm
Location: Adelaide Australia

Re: 1981 R100RS Diaphragm Spring Height

Post by Roy Gavin »

And a new late carb spring is 122.5 mm relaxed, and it has 21 1/2 coils, if anyone ever wondered.
Adelaide, Oz. 77 R75/7. 86 R80 G/S PD, 93 R100 GS, 70 BSA B44 VS ,BMW F650 Classic
Deleted User 72

Re: 1981 R100RS Diaphragm Spring Height

Post by Deleted User 72 »

Roy Gavin wrote:And a new late carb spring is 122.5 mm relaxed, and it has 21 1/2 coils, if anyone ever wondered.
I'm pretty sure the clutch will slip using those springs, but I haven't tried it.
Major Softie
Posts: 8900
Joined: Tue Aug 03, 2010 1:46 pm

Re: 1981 R100RS Diaphragm Spring Height

Post by Major Softie »

Native /5 wrote:
Roy Gavin wrote:And a new late carb spring is 122.5 mm relaxed, and it has 21 1/2 coils, if anyone ever wondered.
I'm pretty sure the clutch will slip using those springs, but I haven't tried it.
I think you would have to use an awful lot of them...
MS - out
Roy Gavin
Posts: 400
Joined: Tue Aug 03, 2010 11:21 pm
Location: Adelaide Australia

Re: 1981 R100RS Diaphragm Spring Height

Post by Roy Gavin »

SU make three or four that fit and are stiffer, if these dont work - something else to play with when you run out of screws to adjust.
Adelaide, Oz. 77 R75/7. 86 R80 G/S PD, 93 R100 GS, 70 BSA B44 VS ,BMW F650 Classic
kutter
Posts: 104
Joined: Tue Dec 07, 2010 9:50 pm
Location: Central Queensland, Australia

Re: 1981 R100RS Diaphragm Spring Height

Post by kutter »

Had to resort to an angle grinder to undo the head stem nut.
Heat failed. Soaking with nut loosener failed.
BF Spanners only succeeded in rotating the top and bottom
yokes out of line by 180 degrees and also the steering head lock engagement hole.
Has to be partly removed anyway to remove the lower bearing.

Image

Even then had to unwind the nut with a cold chisel. The locknut would not let go either.

Removing seatlock from subframe in preparation for powdercoating.
Two of the clips that help hold the sidecovers on are on the point of
breaking off due to having been bent and straightened several times.
I am thinking of cutting all four off and attaching the sidecovers by different
means. I am not greatly impressed by the original rubberband system anyway.
I don't mind undoing a couple of screws at least they will be secure.
Has anyone done a modification along these lines??
3/85 R80 Mono
5/81 R100RS - Shed Find

kutter
Rockhampton
Queensland
Australia
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SteveD
Posts: 4941
Joined: Tue Aug 03, 2010 3:29 am
Location: Melbourne, Oz.

Re: 1981 R100RS Diaphragm Spring Height

Post by SteveD »

Stubborn nut that one!

The side cover stubs are fragile. The right cover is the commonly lost one, but the fix is to use a different method and not rely on the rubber band. I've just used cable ties to hold them on, after discreetly drilling adequate holes into the side cover...one at the front, and one at the top on the flat surfaces that are perpendicular to the main cover surface. The cable tie fastens them to the frame at the top, and the front one loops around the hook for the rubber band.
Cheers, Steve
Victoria, S.E.Oz.


1982 R100RSR100RS supergallery. https://boxerboy81.smugmug.com/R100RS
2006 K1200R.
1994 R1100GS.
kutter
Posts: 104
Joined: Tue Dec 07, 2010 9:50 pm
Location: Central Queensland, Australia

Re: 1981 R100RS Petrol Cap

Post by kutter »

Looks like I have the non undoing petrol cap syndrome.
I just found out about this on another BMW forum.
Two fixes were mentioned

1. Pulling it open with a rope through the handle?

2. Dilling a hole in the cap and inserting a self tapper
to lock the inner workings to the outside of the cap

Does anyone have details of where to drill the cap for
the self tapper fix?
3/85 R80 Mono
5/81 R100RS - Shed Find

kutter
Rockhampton
Queensland
Australia
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