The New BMW R90S Site

Welcome to the new R90S Website!

This is the new location for, which has become a part of the Vintage BMW Motorcycle Owners (VBMWMO) website. This R90S homepage is your portal to news, information, comraderie and help with the BMW R90S motorcycle, produced from 1974-1976 in TT Silver Smoke and Daytona Orange paint.

If you're an existing member of the R90S forum, you'll find that your account has been moved over, and any posts you may have made are now a part of the VBMWMO Forum. To login, just click on the login link above on the right, in the banner.

We also suggest that you visit the home page of the R90SWorldNet mailing list, where you can find a huge amount of detail and information about this special model.

Model Specifications
Displacement 898cc
Cylinders 2
Bore x Stroke (mm) 90 x 70.6
HP @ RPM 67 @ 7000
Compression Ratio 9.5:1
Valves OHV, 2 per cylinder
Clutch Dry, single plate, cable operated
Transmission 5 speed, foot shifted
Final Drive Driveshaft
Running Gear
Frame Tubular steel double cradle
Front Suspension Hydraulically damped telescopic fork
Rear Suspension Twin shock swingarm
Front Brakes Dual ATE 260mm disc with single piston
Rear Brakes 200mm drum, single leading shoe
Ignition Battery/coil
Spark Plugs Bosch W5DC
Generator Bosch G1 14 13V 21A 280W
Capacities & Measurements
Weight 220kg
Fuel 24l
Wheelbase 1465mm
Top Speed 200kph
Number Produced 17465
by skychs
1975 R90S Its time for fluids. Sensitive topic I know .... so lets not go there. Im just curious what everyone is...
Last updated: 27 min 34 sec ago; 3 Replies
by MikeL46
It was 1977. I had been riding Hondas (CB/CL350/450) and for the prior few years Triumph Bonnevilles - still have a 70...
Last updated: 4 days 7 hours ago; 0 Replies
by skychs
Last month I finally picked up the bike of my dreams ... a 1975 R90S. It was a one owner bike purchased from the Mid...
Last updated: 5 days 7 hours ago; 62 Replies
by monkeybikegirl
Hi Everyone I hope this is not too vague. My R90s was set up very recently, with Dellortoes rebuild and balanced....
Last updated: 6 days 8 hours ago; 23 Replies
by tm.chao
Ask for the meaning of these two groups of numbers on R90S engine housing.(Not VIN)
Last updated: 6 days 10 hours ago; 6 Replies
by tm.chao
How many fins should R90S have on cylinder? On mine : 10 fins 2014 R90S by MAX BMW: 10 fins Boxer Metal: 11 fins (...
Last updated: 6 days 11 hours ago; 1 Replies
by JakeF
A new clutch cable arrived in the mail today along with some other parts and I want to confirm the cable routing before...
Last updated: 2 weeks 1 day ago; 2 Replies
by JakeF
In most photos of an R90S I see a gas cap that is raised and chromed. Mine (a very late serial number 1976) is neither...
Last updated: 2 weeks 3 days ago; 7 Replies
by JakeF
R90S up for auction at Bonham's Las Vegas in a couple of days. Here is the link.
Last updated: 2 weeks 4 days ago; 7 Replies
by skychs
This bike came up for sale locally here in Virginia. I don’t know the bike but I do know the owner. I bought a bike...
Last updated: 3 weeks 1 day ago; 1 Replies