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Search found 7 matches

by bmstan
Wed Apr 03, 2024 8:06 am
Forum: R90S World
Topic: R90S head chamber volume
Replies: 4
Views: 203

Re: R90S head chamber volume

My 1975 R90s with a plug fitted to a clean head, no carbon, is 87cc level to the head gasket face.
by bmstan
Sun Oct 15, 2023 4:40 am
Forum: Classic (1970-25 years ago) Motorcycles
Topic: Custom seat for Heinrich tank
Replies: 4
Views: 5762

Re: Custom seat for Heinrich tank

Whatever thickness of rubber washers you use to get the weight off the seat use the same thickness under the 2 support rubbers, with longer bolts, to maintain the current height ratio.
by bmstan
Sat Mar 25, 2023 5:55 am
Forum: R90S World
Topic: Timing Cover Wear
Replies: 5
Views: 9345

Re: Timing Cover Wear

To me it looks like the lower hole in the front case were the camshaft comes through.There is no bearing in that position, just a seal.It looks like someone has used a socket or tube to knock the seal out and caught the side of the case.There is nothing close enough on the timing chain/sprocket to c...
by bmstan
Sat Jan 28, 2023 6:47 pm
Forum: Classic (1970-25 years ago) Motorcycles
Topic: Side stand and foot peg finish
Replies: 2
Views: 920

Re: Side stand and foot peg finish

On my 75 R90s which I have owned for 40+ years both the footrest and the Sidestand are bright chromed as originally supplied.
by bmstan
Sun Nov 06, 2022 6:15 am
Forum: Classic (1970-25 years ago) Motorcycles
Topic: S fairing installation
Replies: 27
Views: 10341

Re: S fairing installation

Yes you've got it but I can't find a part number for the "storks" ! Round here they are rather large birds😁. Must be that auto correct and for that we should be eternally grapefruit !
Good diagram, I'm sure it will help folk in the future👍
by bmstan
Sat Nov 05, 2022 9:05 am
Forum: Classic (1970-25 years ago) Motorcycles
Topic: S fairing installation
Replies: 27
Views: 10341

Re: S fairing installation

I should also have said that the one piece eccentric bush, Ulis 154 was superseded some years ago as it was almost impossible to get the fairing on using it, without cracking the fairing. If that's what you have, do yourself a favour and bin it! Be aware that the exploded fairing parts drawing used ...
by bmstan
Sat Nov 05, 2022 8:44 am
Forum: Classic (1970-25 years ago) Motorcycles
Topic: S fairing installation
Replies: 27
Views: 10341

Re: S fairing installation

On Ulis site the eccentric/159 (oem 46631234406) is used with the flat rubber washer/158 (oem 46631234407). Use this combination on both sides, with the flat rubber washer going on first, on both sides. Fit the fairing and put the eccentric on from the outside. Turn it to alter/match the height to t...