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 Ericandchi
Hi all, This is my first post and i'm not sure how active this forum is. But I figure I might start with something...
Last updated: 13 hours 26 min ago; 12 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: 3 weeks 2 days ago; 26 Replies
by san-arthur
I uninstalled the battery to recharge it, it was flat. It´s heavy! 19.2 lbs!!
Last updated: 3 weeks 2 days ago; 8 Replies
by jrsbike
Well when my tank was stripped for painting it was found to be a bondo mess so I am looking around for a restorable...
Last updated: 4 weeks 1 day ago; 0 Replies
by 2valve
The time has come to sell off my pride and joy. Iv'e owned it for over twenty years so it will be sad to see that empty...
Last updated: 5 weeks 5 days ago; 1 Replies
by JohnR
I'm restoring my 1975 R90s, the seat cover was split and holed so I bought a new one from Siebenrock. The dimensions...
Last updated: 7 weeks 2 days ago; 0 Replies
by bmwsog
This may be more than a cooler engine temperature seen just starting out within roughly a mile or two from startup. My...
Last updated: 7 weeks 6 days ago; 1 Replies
by jrsbike
I was looking to restore the interior of my tank. I'm not confident with all the sealers out there: POR-15, Kream, Red-...
Last updated: 9 weeks 5 days ago; 3 Replies
by obersturm
Hi all, chiming in from Melbourne/Australia. What a great community you have here! I am after some thoughts by seasoned...
Last updated: 13 weeks 2 hours ago; 7 Replies
by bmwsog
Newly found and rescued 1974 R 90 S, with original tool kit and BMW shop manual/parts manual, Tom Cutter's excellent...
Last updated: 13 weeks 4 days ago; 3 Replies