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 monkeybikegirl
Hi all
Last updated: 2 days 5 hours ago; 13 Replies
by SteveH
I have taken off the original side stand from my 75 R90s It has been painted black and looks horrible and i want to...
Last updated: 5 days 10 hours ago; 7 Replies
by tobydog61
hey everybody, new guy here. I have been working on, restoring, and just plain having fun with old bikes for quite...
Last updated: 1 week 2 days ago; 19 Replies
by san-arthur
HI everyone I’m going to service the brakes on my R90S. I need ATE’ front brake caliper O-rings, which is sandwiched...
Last updated: 1 week 2 days ago; 27 Replies
by wolds
I have an opportunity to purchase a friend of mines 76 R90S. He is the original owner and the bike has 38000 miles on...
Last updated: 2 weeks 3 days ago; 18 Replies
by tobydog61
So I have been able to figure out countless small issues as I work to get my '75 R90S back on the road. I'm close to...
Last updated: 4 weeks 4 days ago; 2 Replies
by beemererik
Does anyone have a set of 1974 R90S 14mm fork sliders in good condition. PN 31421233150 and 31421233151. I am working...
Last updated: 6 weeks 4 days ago; 1 Replies
by wolds
looks like I'm going to have to replace both pistons. What are my alternatives to BMW replacements. Anyone make SS...
Last updated: 7 weeks 3 days ago; 4 Replies
by stevdmo
I have this 1975 R90S VIN 4980313 that I am getting ready to sell and am wondering how to determine it's value. I have...
Last updated: 7 weeks 6 days ago; 4 Replies
by sgnden
Hello: Brand new to this group. Thanks for being here. I have owned 10 bikes in my years but never a vintage airhead....
Last updated: 8 weeks 6 days ago; 8 Replies