46 BMW 1977 R100RS Remove, Disassemble Body Work

The first project I plan to do on this bike is repair the cracks in the body work so I can get them to my painter. But first, I have to get all the bodywork off the bike and disassembled.

This write-up shows how I remove all the body work (the seven fairing panels, upper fairing bracket, seat and seat cowl, front and rear fenders), disassemble the faring panels and remove the seat pan, grab rail, rubber bumpers and internal foam pad from the seat cowl. Since I have to disassemble the fairing the write-up shows how I remove the exhaust system; the windscreen; the front turn signals, clear headlight glass housing and the parking light; the black dashboard; the ignition switch and gauges from the black dashboard; remove all the fasteners to disassemble the panels; and, finally remove the top fairing bracket as the bike is being stripped down the frame and the bracket needs to be repaired.

Note:
The upper fairing can be removed from the bike without disassembly of the fairing panels, windscreen and black dash by removing four bolts that hold the mirrors to the top rail of the upper fairing bracket, the two bolts that hold the lower and upper side panels to the lower fairing bracket, removing the fasteners that attach the two lower side panels to the upper and middle center panels, disconnecting the front electrical harness inside the fairing and removing the ignition switch from the black dash. Then the top panels of the fairing can be slide off the bike leaving the two lower panels that are captured by the exhaust pipes. 

Remove Exhaust System

This is straight forward. I documented doing this here on my 1975 R75/6 and the tools and procedure for the R100RS is the same:

Remove Windscreen

The screen is damaged so I will replace it.

Screen Damage So I Will Replace It

Windscreen Damage

The windscreen is secured with 14 plastic rivets that are made from two pieces, a center plastic rod and the outer rivet with expanding feet. From the outside, it’s hard to see there is a center black plastic rod in head of the rivet.

Windscreen Rivet Showing Center Pin

Windscreen Rivet Showing Center Pin

Windscreen Rivet Legs Inside Fairing

Windscreen Rivet Legs Inside Fairing

Wind Screen Rivet with Center Pin

Wind Screen Rivet with Center Pin

The procedure is to use a metal drift to push the rod from the outside until it comes out of the rivet body on the inside of the fairing. As I didn’t have a small enough diameter drift I used a small drill bit a bit smaller than the diameter of the pin and a plastic hammer to drive the pin as they didn’t want to slide very easily. Although the rivets and pins can be reused, I will replace these.

NOTE:
A spritz of WD40 would likely help loosen and lubricate the center pin so it will slide. I opted to drive it out with a plastic hammer as I found pushing on it meant it was easy for the drift to slide off the rivet and scratch the windscreen.

I later found that a used carburetor float hinge pin is just the right diameter for the drift. But, the end of the pin is rounded so it slides off the rivet easily. Grind one end of the pin so it is flat and it should work well.

Drill Bit "Drift" and Windscreen Rivet Center Pin

Drill Bit “Drift” and Windscreen Rivet Center Pin

Pushing Wind Screen Rivet Center Pin Out

Pushing Wind Screen Rivet Center Pin Out

Drill Bit and Hammer Removing Center Pin of Windscreen Rivet

Tapping Drill Bit with Plastic Hammer to Drive Center Pin Out of Windscreen Rivet

Once the center pin is driven out of the body of the rivet, it can be pulled outward to remove it from the hole.

Pulling Windscreen Rivet Out After Center Pin is Removed

Pulling Windscreen Rivet Out After Center Pin is Removed

I managed to split a couple of the center pins trying to remove them with the drill bit when I used the fluted end of the bit against the pin. So I had to cut the head of the rivet off with a razor blade and use a larger drift to push the entire rivet from the outside.

Cutting off Damaged Wind Screen Rivet with Razor Blade

Cutting off Damaged Wind Screen Rivet with Razor Blade

Using Drift to Push Damaged Windscreen Rivet Through Hole

Using Drift to Push Damaged Windscreen Rivet Through Hole

Here is the fairing with the windscreen removed.

Windscreen Removed

Windscreen Removed

Remove Turn Signals, Parking Light, Headlight Glass Housing

On the inside of the fairing, I remove the rubber covers over the turn signal wires.

Turn Signal Detail Inside Fairing

Left Turn Signal Housing with Rubber Boot Inside Fairing

I remove the turn signals by removing the two screws that secure the yellow lens to the housing. Then I disconnect the leads from the bulb housing.

Left Turn Signal Removed Showing Wires

Left Turn Signal Removed Showing Wires

I remove the parking light housing above the headlight by removing the two screws at the sides of the lens. Then I pull the housing forward and remove the wires from the spades in the back of the bulb housing.

Parking Light Removed With Wires In Back

Parking Light Removed With Wires In Back

At first glance, it’s not clear how to remove the glass headlight cover.

Headlight Glass Cover with Housing

Headlight Glass Cover Housing; Orange Lines are For Styling, NOT to Prevent Radar Detection 🙂

It is secured by four screws in each corner of the cover. I peel the black edge molding away from the glass at a corner to reveal the screw so I can use a Philips head screw driver to remove it.

Headlight Cover Screw Location-All 4 Corners

Headlight Glass Cover Housing Screws Are Located in All Four Corners

Unscrewing Headlight Cover Screw

Unscrewing Headlight Glass Cover Housing Mounting Screw

Then I peal the black edge molding away from the top fairing panel being careful to keep the glass shell from falling on the floor. The glass is secured to the rubber boot by the inner edge of the boot.

Pulling Headlight Cover From Front Fairing Panel

Pulling Headlight Cover Housing From Headlight Fairing Panel

Headlight Glass Cover From Inside

Headlight Glass Cover Housing From Inside

The headlight and its mounting to the ears of the fairing bracket are now exposed. Also, the lower arms of the upper fairing bracket are exposed to I can remove the screws securing them to the top headlight panel and top side panels. I’ll remove these screws later.

Headlight Glass Cover Housing Removed Showing Lower Mounts of Upper Fairing Bracket

Headlight Glass Cover Housing Removed Showing Lower Mounts of Upper Fairing Bracket

Remove Black Dash

It will be easier to remove the volt meter and ignition switch if I remove the black dash first. It is secured to the the three top fairing panels with copper rivets.  I use drill bits to weaken the rivet. I use a smaller bit that is just a bit wider than the inside of the rivet and carefully drill at low speed into the hollow part of the rivet past the flared head.

Carefully Drilling Inside of Dash Rivet

Carefully Drilling Inside of Dash Rivet

Then I use a wider bit and carefully drill at low speed into the head of the rivet. In most cases the head twists off with the drill bit. If it didn’t, I use a small screw driver blade to bend the remaining edge of the rivet head up and grab it with needle nose pliers so I can tear the head off the body of the rivet.

Tearing Thin Top Edge of Rivet Off the Body

Tearing Thin Top Edge of Rivet Off the Body

I use a drift and a plastic hammer to tap the body of the rivet out of the hole toward the inside of the fairing.

Punching Out Dash Rivets with Drift

Punching Out Dash Rivets with Drift

Dash Removed From Fairing Panels

Dash Removed From Fairing Panels

Remove Dash Instruments & Ignition Switch

The wiring to the dash instruments and the turn signals is in a separate harness the plugs into the main harness inside the right side of the fairing. I took pictures of the routing of the harness, the instrument and ignition wires and the VDO oil pressure-temperature gauge wires so I can put it back the same way.

Left Side Wire Harness to Front Turn Signals, Gauges Detail

Left Side Wire Harness Connector for Front Turn Signals & Gauges

Left Side Instrument Harness Upper Mounting Detail

Left Side Instrument Harness Upper Mounting Detail

Left Side Under Dash Detail

Left Side Under Dash Detail Showing Wire Routing to Volt Meter

Right Side Turn Signal Wire Detail

Right Side Turn Signal Wire Detail & Tachometer Cable Removed

Right Side Clock Wires, But No Clock

Right Side Clock Wires, But No Clock, And Back Side of Parking Light Housing

Volt Meter Wires and Bracket

Volt Meter Wires & Bracket with Knurled Nuts

VDO Oil Pressure and Temperature Gauge Wires

VDO Oil Pressure and Temperature Gauge Wires Were Cut Off-How Rude.

Here is the wiring detail for the volt meter and ignition switch while they are still in the black dash.

Volt Meter Wires

Volt Meter Wires

Volt Meter and Ignition Switch Wires

Volt Meter (Left with Bracket Removed) and Ignition Switch Wires (Right)

Ignition Switch Wires

Ignition Switch Wires

Volt Meter and Ignition Switch Wires

Ignition Switch Wires

I remove the metal bracket on the back side of the black dash that secures the volt meter to the dash by loosening the two knurled nuts that secure it. I remove the light bulb socket and wires from the back of the meter to remove it. This meter is an early one as it has the white numerals instead of the green used on later Motometer instruments.

Motometer Volt Meter with White Markings, Front

Early Motometer Volt Meter with White Markings

Motometer Volt Meter, Rear

Motometer Volt Meter, Rear

The clock is missing, but the procedure to remove it is the same as for the volt meter.

I remove nut from the back of the ignition switch and then the ring with the two holes that secures the ignition switch to the dash and the wires from the back to remove it.

Rear Nut on Ignition Switch

Rear Nut on Ignition Switch

Ignition Switch, Front Ring and Plate

Ignition Switch, Front Ring and Plate

Unscrewing Ignition Switch Top Ring

Unscrewing Ignition Switch Top Ring

The front ring with the two holes can be removed from the front of the dash when you need to remove the fairing as a single unit. I would use two drill bits and put a screw driver between them to twist the ring off the threads. Since I am disassembling the fairing and I have the dash off the fairing, I just loosened the nut on the back and then the front ring.

Ignition SwitchTop Ring

Ignition SwitchTop Ring

Here are the pieces of the ignition switch assembly.

Ignition Switch Parts

Ignition Switch Parts

Separate Fairing Panels

I can reach all the fasteners that bolt the fairing panels together. Inside the headlight panel are several screws that secure the top side panels to the headlight panel. At the bottom is a bolt that secures the headlight panel and top panels to the lower arms of the upper fairing bracket.

Left Side Headlight Panel Screws Into Upper Panel

Left Side Headlight Panel Screws Into Upper Panel

Headlight Panel Left Side Upper Screw

Headlight Panel Left Side Upper Screw

Headlight Panel Lower Left Side Screws Into Upper Side Panel

Headlight Panel Lower Left Side Where Lower Arm of Upper Fairing Bracket Attaches To Upper Side Panel

Left Side Wiring Connector & Low Arm of Upper Fairing Bracket

Left Side Wiring Connector & Lower Arm of Upper Fairing Bracket

The right side of the headlight panel has considerable damage including the tab the right side lower arm of the upper fairing bracket is bolted to. This helps explain why the fairing rattled and felt loose.

Headlight Panel Damage At Upper Fairing Bracket Lower Arm Mounting Tab

Headlight Panel Damage At Upper Fairing Bracket Lower Arm Mounting Tab

The lower arm of the upper fairing bracket is secured with a screw and white plastic spacer through a tab in the headlight bracket and into the hole in the upper fairing panel.

Upper Fairing Bracket Lower Arm Mounting Detail

Upper Fairing Bracket Lower Arm Mounting Detail

The upper arms of the upper fairing bracket secures the top side panels using the rear view mirror brackets.

Upper Fairing Bracket Upper Arm Bolts Mount to Side Panel & Rearview Mirror

Upper Arm of Upper Fairing Bracket Mounts to Top Side Panel Using Rear View Mirror Bracket

The lower fairing bracket bolts through the top and bottom side panels to secure them. I remove the bolts.

Lower Fairing Brace Bolts Through Upper & Lower Side Panels

Lower Fairing Brace Bolts Through Upper & Lower Side Panels

There are numerous screws the secure the lower side panels to the upper side panels and the lower side panels to the lower center and middle center panels.  Here is the left side when the upper and lower side panels are removed.

Left Upper and Lower Side Panels Removed

Left Upper and Lower Side Panels Removed

Once all the screws are removed, the panels separate.

Middle Center Panel-Secured by Brake Lines & Grommets

Middle Center Panel-Secured by Brake Lines & Grommets

Fairing Panels Removed

Fairing Panels Removed

Fairing Panels Removed

Fairing Panels Removed

The headlight panel has brackets that the screws holding the headlight glass housing screw into. I remove these.

Headlight Panel Showing Glass Cover Brackets

Headlight Panel Showing Glass Cover Brackets

Headlight Panel Glass Cover Bracket Detail

Headlight Panel Glass Cover Bracket Detail

The headlight panel has extensive damage so I will replace it with a better condition used panel.

Headlight Panel Cracks

Headlight Panel Cracks

Headlight Panel Cracks

Headlight Panel Cracks

Headlight Panel Cracks

Headlight Panel Cracks

Headlight Panel Damaged Tabs

Headlight Panel Broken Tabs

There are numerous cracks in the upper side panels, the right lower side panel and the side covers. I can repair these and will document how I do this in a separate write-up.

The upper fairing bracket bolts to the steering stem. However, I see that the bracket is secured with a hose clamp, so likely it’s damaged.

Upper Fairing Bracket Secured with Hose Clamp, Hmmm

Upper Fairing Bracket Secured with Hose Clamp, Hmmm

Remove Headlight Shell

I remove the headlight shell from the front of the upper fairing bracket. On the left side where the ignition switch mounts on bikes that don’t have the integrated fairing, there is a metal plug used to fill the ignition switch hole. I remove the chrome nut, metal wave washer and rubber gasket. Not shown are another metal washer that goes against the inside of the bracket and another rubber gasket that goes against the headlight shell.

Left Headlight Attacment

Left Headlight Attachment

The order of the parts is shown below, but the rubber gasket that goes against the headlight shell is missing; the left most metal ring goes against the inside of the headlight bracket and the rubber gasket, metal wave washer and nut go on the outside of the headlight bracket.

Left Headlight Attachment Parts (Missing Rubber Gasket on Far Left)

Left Headlight Attachment Parts (Missing Rubber Gasket on Far Left)

The right side headlight shell mounting parts order is shown below, again with the left-most part going against the headlight shell.

Right Side Headlight Attachment Hardware

Right Side Headlight Attachment Hardware

To remove the headlight shell from between the headlight brackets, face the front of the bike and twist the left side (facing the bike) of the shell downward and to the front of the bike. As it passes below the left side bracket there will be enough room to push the headlight shell to the left so the right side metal plug can slip out of the right bracket. It takes some force and it’s easy to scratch the paint on the headlight shell, so be careful.

Remove, Repair Upper Fairing Bracket

Now I can remove the upper fairing bracket which is secured with two bolts into the steering stem. But, when I removed the hose clamp, the bracket falls off. The rear plate that mounts against the steering stem with two bolts is sheared off so only the hose clamp held the upper fairing bracket to the steering stem. Again, no wonder the fairing rattled and seemed loose!

Upper Fairing Brace Mounts to Steering Stem

Upper Fairing Brace Mounts to Steering Stem

Broken Upper Fairing Bracket Steering Stem Mount

Broken Upper Fairing Bracket Steering Stem Mount

Broken Upper Fairing Bracket Steering Stem Mount

Broken Upper Fairing Bracket Steering Stem Mount

I had the bracket welded and it will be good as new after I get it powder coated.

Upper Fairing Bracket Repair

Upper Fairing Bracket Repair

Upper Fairing Bracket Repair

Upper Fairing Bracket Repair

Upper Fairing Bracket Repair

Upper Fairing Bracket Repair

Upper Fairing Brace-Front Side

Upper Fairing Brace From Front

Upper Fairing Brace From Rear

Upper Fairing Brace From Rear

Upper Fairing Brace Showing Headlight Brackets

Upper Fairing Brace Showing Headlight Brackets

Based on the damage to the left side of the headlight panel and the broken upper fairing mounting bracket I think the bike hit something causing the damage. When I get everything stripped off the frame, I will check it to see if it is bent. If so, I can get it straightened.

Here are pictures of how the lower fairing bracket mounts to the frame. I’ll remove it when I strip all the parts off the frame.

Lower Fairing Brace Location Across Spine Tube

Lower Fairing Brace Location Across Frame Tube

Lower Fairing Brace Mounts to Spine Tube With Bracket

Lower Fairing Brace Mounts to Spine Tube With Bracket

Remove & Disassemble Seat Cowl and Seat

The next piece of bodywork to remove is the seat and cowling. The seat is attached to the cowling and the seat is attached to the frame on pins using triangle shaped hinge plates.

You can see the details of how the hinge plates attach to the seat pan in the write-up for attaching the seat on my 1973 R75/5. The hinges are the same as those on the RS.

I remove the six Allen head screws that secure the hinges to the seat pan and remove the seat and cowl.

The RS seat has a “hidden” front compartment and another plastic compartment toward the front for the owners manual.

Hidden Front Storage Bin in Seat Showing Latch

Hidden Front Storage Bin in Seat Showing Latch

</script

Hidden Front Storage Bin in Seat

Hidden Front Storage Bin in Seat

User Manual Stored in Plastic Bottom Seat Pocket

User Manual Stored in Plastic Bottom Seat Pocket

Seat Pan Bottom-User Manual Pocket and Label

Seat Pan Bottom-User Manual Pocket and Label-Note Location of Phillips Head Bolts Along Edge of Metal Cowl That Secure the Cowl to the Seat Pan

The metal cowl is fastened to the seat pan with bolts along the edge of the cowl as shown in the picture above. I remove Phillips head screws to separate the cowling from the seat.

Seat Removed from Metal Rear Cowl

Seat Removed from Metal Seat Cowl

On the underside of the cowling, at the rear, a foam pad is glued to keep it from rattling. I need to remove it before it is painted. Also, the grab rail rear bolts are underneath the front edge of the foam pad.

Seal Cowl Rear Foam Pad Location-It Covers Rear Grab Rail Bolts

Seal Cowl Rear Foam Pad Location-It Covers Rear Grab Rail Bolts

The pad is separated from the metal cowl in several places and I gently peal it away from the cowling. Where it is firmly glued on, I use a single edge razor blade and carefully slice the pad away from the cowling being careful to remove as little of the foam pad as possible so I can reuse it.

Seat Cowl Foam Bumper Removed

Seat Cowl Rear Foam Pad Removed

There are two rubber bumpers at the front of the cowling. Using a Phillips head screw driver from the underside, I push the pin of the bumper through the hole.

Seat Cowl Front Rubber Bumper "Pin"

Seat Cowl Front Rubber Bumper “Pin”

Removing Rubber Bumper At Front of Metal Seat Cowl

Removing Rubber Bumper At Front of Metal Seat Cowl

The grab rail at the rear of the cowling is secured by four bolts with plastic spacers between the rail and the outside of the cowling. Two larger bolts are along the sides of the cowling and two smaller bolts are underneath the rear foam pad that I just removed. I remove the bolts and the grab rail.

Grab Rail Side Mounting Bolt Location

Grab Rail Side Mounting Bolt Location

Grab Rail Side Mounting Hardware

Grab Rail Side Mounting Hardware

Grab Rail Rear Bolt Location Under Foam Pad

Grab Rail Rear Bolt Location Under Foam Pad

Grab Rail Rear Mounting Hardware

Grab Rail Rear Mounting Hardware

Remove Front & Rear Wheels and Fenders

Here is what I have so far. All that’s left is to remove the front and read fenders.

Ready to Remove Rear Wheel and Fender

Ready to Remove Front & Rear Wheels and Fenders

I remove front wheel and the Telefix front fork brace. Then I remove the four chrome acorn nuts securing the front fender to the sheet metal fender bracket mounted between the fork tubes.

Before removing the rear fender, I remove the rear wheel to make it easier to access the mounting hardware. Removing the rear fender is more work as it requires removing the rear under seat storage compartment and the rear tail light, turn signals and the stalk they mount to and the license plate bracket and rear reflector and then the rear fender.

I remove the two screws securing the tail light lens to the tail light housing.

Stop Light Removed From Housing

Stop Light Removed From Housing

There are ground wires (brown) and the tail light (black/white) and stop light (green/red) wires plugged into the back of the metal tail light housing.

Stop Light Connections

Stop Light Connections

Remove Turn Signals and Chrome Mounting Tube

Inside the tail light housing is the rear turn signal harness that goes inside the chrome tube the turn signals mounts to. The Blue/Red goes to the left signal and the Blue/Black goes to the right signal each of which also has a brown ground wire going to it.

Stop Light Housing Wiring Location

Stop Light Housing Wiring Location

I detach the turn signal leads from the tail light housing and pull them through the hole in the bottom of the housing. Now I can take the chrome turn signal tube to the work bench.

I detach the turn signal wire and ground wire from the turn signal reflector housing inside the turn signal housing. Then I remove the clamp on the inside of the turn signal housing that secures it to the chrome tube so it’s easier to pull the wires out of the tube.

Rear Turn Signal Housing Wiring

Rear Turn Signal Housing Wiring

Rear Turn Signal Stalk Retaining Clamp

Rear Turn Signal Stalk Retaining Clamp

Then I pull the turn signal wires out of the chrome tube.

Rear Turn Signal Wire Routing

Rear Turn Signal Wire Routing

The rear plastic storage box mounts to the rear sub-frame bracket. I remove the bolts, straps and nuts to remove the storage box.

Rear Box Mounting Hardware

Rear Box Mounting Hardware

When I remove the storage box, I can access the rubber pads between it and the sub-frame.

Rear Box Mounting Hardware and Sub-frame Rear Bracket

Rear Box Mounting Hardware and Sub-frame Rear Bracket

Rear Fender - Rear Mount Top Rubber Gaskets

Rear Fender – Rear Mount Top Rubber Gaskets

Rear Fender Mount - Top & Bottom Rubber Gasket Location

Rear Fender Mount – Top & Bottom Rubber Gasket Location

Here is the mounting hardware that secures the box and the rear of the rear fender. The fender goes between the metal strap and the rubber gaskets at the top while the storage box goes between the lower rubber gasket and the metal strap at the bottom with the nuts inside the storage box.

Rear Fender - Rear Mounting Bracket

Rear Fender – Rear Mounting Bracket

Rear Storage Box, Top

Rear Storage Box, Top

Rear Storage Box, Bottom

Rear Storage Box, Bottom

Toward the top of the fender toward the front is another sub-frame bracket the rear fender mounts to.

Rear Fender Mounting Hardware

Rear Fender Mounting Hardware

On the underside of the bracket next to the fender are two rubber gaskets.

Rear Fender Mounting Rubber Gaskets

Rear Fender Mounting Rubber Gaskets

Here is the mounting hardware for the front mount of the rear fender.

Rear Fender - Top Mounting Bracket

Rear Fender – Top Mounting Bracket

I remove the screws securing the license plate bracket and the rear reflector from the rear fender. Here is what the bikes looks like now.

Body Work & Wheels Removed

Body Work & Wheels Removed

And the pile of bodywork ready to go to the painter.

Body Work Ready For the Painter

Body Work Ready For the Painter

Revisions

2017-06-13  Added section about removing rear turn signals and chrome tube.

2 thoughts on “46 BMW 1977 R100RS Remove, Disassemble Body Work

  1. Thanks for the detailed info. I just got a ’77 RS and the fairing had already been removed. Never having a Faired BMW before left me clueless on how the panels were mounted. Ride safe.
    Kieran

    • Hi Kieran,

      You’re welcome. I’m pretty close to putting the newly painted body work back on the bike.

      Best.
      Brook.

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