52 BMW 1983 R100RS Assemble And Install Seat Cowl & Seat

I had the fairing, front fender, side covers and gas tank painted in a two tone paint scheme, code 130, used on the RS bikes; the colors are Dunkel Blue and Hell Silver. In this scheme, the seat cowl is painted Dunkel Blue but I chose to use Hell Silver instead. And in tribute to the first year 1977 RS, I had matte clear coat applied instead of gloss and a single white pin stripe applied.

Parts

I got a new clip to secure the rear seat hinge, new rubber bumpers for the bottom of the cowl and a new rondel for the rear of the cowl.

Part #                   Description                                                          Qty
07 12 9 934 318 LOCK RING – D6,0-Rear Seat Hinge Retention 1
52 53 1 232 904 COWLING BUMPER 2
46 63 7 686 746 BADGE – D=70MM 1
Seat Cowl And Seat Hardware

Seat Cowl And Seat Hardware

Video

This video shows the highlights of the assembly process.

VIDEO: 1983 BMW R100RS Install Seat Cowl and Seat

Install Foam Pad, Rondel And RS Badge On Cowl

Inside the cowl, at the rear, a foam pad is glued on the inside of the cowl. I removed it before having it painted. I install it using silicone seal and position toward the rear so the rear tool box will clear it when the seat is closed.

Cowl Rear Foam Pad

Cowl Rear Foam Pad

Cowl Rear Foam Pad Secured With Silicone Seal

Cowl Rear Foam Pad Secured With Silicone Seal

I clean the surface the rondel and badge mount on with alcohol wipes to get rid of any oil and dirt. I peal the backing off the rondel and position it, then press it firmly into the detent.

Using Alcohol Pad To Clean Cowl Before Attaching Rondel And RS Badge

Using Alcohol Pad To Clean Cowl Before Attaching Rondel And RS Badge

Rondel Attached To Cowl

Rondel Attached To Cowl

I use 3M molding tape to attach the RS badge. I apply the tape to the back of the badge, peal off the red protective coating and press it into the rectangular detent underneath the rondel.

3M Molding Tape

3M Molding Tape

Two Sided Molding Tape On RS Badge

Two Sided Molding Tape On RS Badge

Rondel and RS Badge Installed

Rondel and RS Badge Installed

Attach Grab Rail

I’m using a combination grab rail/parcel rack.

Combination Grab Rail/Parcel Rack

Combination Grab Rail/Parcel Rack

The ends of the grab rail tubes are open. A plastic plug fits in the hole. The plug has fingers that hold a square nut. The bolt that secures the bottom of the grab rail threads into the square nut.

Bottom Grab Rail Plug With Square Nut

Bottom Grab Rail Plug With Square Nut

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

There is a special plastic washer with a cutout that fits around the circular grab rail. The bolt, flat washer and wave washer are attached from the inside of the cowl.

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

Bottom Grab Rail Hardware Detail

The top grab rail bolt is longer. It too has a special plastic washer that fits between the outside of the cowl and the grab rail.

Upper Grab Rail Hardware Detail

Top Grab Rail Hardware Detail

I left the bottom bolts loose so I can rotate the grab rail. I place the two plastic washers at the top holes of the grab rail and carefully rotate the rail down so I don’t scratch the paint with the plastic washers. I push the bolts through the holes in the grab rail and secure them on the inside with the wave washer and lock nut.

Upper Grab Rail Hardware Detail

Top Grab Rail Hardware Detail

Upper Grab Rail Hardware Detail

Top Grab Rail Hardware Detail

Top Grab Rail Hardware Detail

Top Grab Rail Hardware Detail

Install Rubber Bumpers and Seat

Two rubber bumpers fit in holes in the front of the cowl. The bumpers point to the inside of the cowl. I pull the legs through the holes.

Rubber Bumper Goes On Bottom Of Cowl

Rubber Bumper Goes On Bottom Of Cowl

Cowl Rubber Bumpers Go On The Bottom

Cowl Rubber Bumpers Go On The Bottom

I turn the sear upside down and lay the cowl on top of the seat. There are slots in the cowl and holes in the bottom of the seat pan with threaded bushings. The seat is secured with 10 bolts (10 mm long) and wave washers. I attach the bolts.

Seat Hardware Detail

Seat Hardware Detail

Small Phillips Screws With Wave Washer Secure Seat to Cowl

Small Phillips Screws With Wave Washer Secure Seat to Cowl

Seat Attached To Cowl

Seat Attached To Cowl

Mount The Seat

There are two hinges that are riveted to the seat pan. The slide over pins on the rear sub-frame. The rear hinge pin has a groove and a clip fits in the groove to keep the seat on the hinge pins.

Seat Hinges Are Riveted To Seat Pan

Seat Hinges Are Riveted To Seat Pan

Rear Seat Hinge Gets A Clip To Keep The Seat On

Rear Seat Hinge Gets A Clip To Keep The Seat On

Seat Hinge Clamp

Seat Hinge Clip

Clip Installed In Groove Of Rear Seat Hinge

Clip Installed In Groove Of Rear Seat Hinge

All Done

All Done

All Done

All Done

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