BMW K bikes (Bricks)


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1Back to top Go down    Belly pan repairs on Mon Apr 10, 2017 5:48 am

KiwiK100

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Silver member
Hi all,
I have purchased a belly pan and all mounting hardware for my 4V however there is some damage that needs filling. The item is stamped BMW and also pfeba on the inside. The belly pan is quite flexible and about 6mm thick. Under the paint the composition is very pale yellow and when heated, very soft. Any idea what the material is, and what do you suggest to repair any damage with. Would flexible plastic putty work?
Thanks for your help


__________________________________________________
Current rides:
2002 K1200RS. Owned from new. Pacific Blue, Ohlins, Speiglers, Fiamms, HID. 165,000km
1991 K1. Classic Black metallic, restoration in progress. 74,000km
1987 K100RS Style. Black, Ohlins, Race Tech springs, Braided lines. Fully restored. 53,000 miles.
The family history:
1951 AJS 500 single - my Dads ride
1953 Triumph Terrier - my Mum's ride
1916 Triumph Type H, Battle of the Somme, France WW1 - my Grand dads ride
    

2Back to top Go down    Re: Belly pan repairs on Mon Apr 10, 2017 11:52 am

Holister

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The normal fibreglass matting and epoxy is the stuff to use. My RT fairing had 3 broken mounts where the antlers attach. I had to rebuild those with epoxy resin putty and then reinforced around them with fibreglass. I also had a major crack around the r/h mirror which the PO had covered over with bog.
Three or four layers of fibreglass on the inside and filled the crack outside with epoxy putty. Don't rush it. Let the resin cure slowly. It will be much stronger.


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

3Back to top Go down    Re: Belly pan repairs on Mon Apr 10, 2017 1:39 pm

Inge K.

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@KiwiK100 wrote:Any idea what the material is,

High pressure molded polyurethan foam.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

4Back to top Go down    Re: Belly pan repairs on Mon Apr 10, 2017 2:25 pm

BobT

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Life time member
@Holister wrote:The normal fibreglass matting and epoxy is the stuff to use. My RT fairing had 3 broken mounts where the antlers attach. I had to rebuild those with epoxy resin putty and then reinforced around them with fibreglass. I also had a major crack around the r/h mirror which the PO had covered over with bog.
Three or four layers of fibreglass on the inside and filled the crack outside with epoxy putty. Don't rush it. Let the resin cure slowly. It will be much stronger.
The fairing is solid and fiberglass is fine, the belly pan is very flexible, I assume to withstand stone chips.
I have a spare 16v belly pan and mounting in my garage, but fear that postage would be prohibitive if anyone wanted it.

    

5Back to top Go down    Re: Belly pan repairs on Mon Apr 10, 2017 3:40 pm

KiwiK100

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Silver member
Silver member
@Inge K. wrote:
@KiwiK100 wrote:Any idea what the material is,

High pressure molded polyurethan foam.
Inge, thank you very much for your concise answer! Prefect.


__________________________________________________
Current rides:
2002 K1200RS. Owned from new. Pacific Blue, Ohlins, Speiglers, Fiamms, HID. 165,000km
1991 K1. Classic Black metallic, restoration in progress. 74,000km
1987 K100RS Style. Black, Ohlins, Race Tech springs, Braided lines. Fully restored. 53,000 miles.
The family history:
1951 AJS 500 single - my Dads ride
1953 Triumph Terrier - my Mum's ride
1916 Triumph Type H, Battle of the Somme, France WW1 - my Grand dads ride
    

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