LOT 91

The David Plant Collection 1987 BMW 987cc K100 RS Registration no. K101 MAN (Isle of Man) Frame no. 144648 Engine no. 17872105

Sold for £1,495 inc. premiumLot to be sold without reserve

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Lot 91

The David Plant Collection, 1987 BMW 987cc K100 RS

Motorcycles Online - The Summer Sale|15 June 2026, 13:30 BST|Online, Milton Keynes

The David Plant Collection
1987 BMW 987cc K100 RS
Registration no. K101 MAN (Isle of Man)
Frame no. 144648
Engine no. 17872105

An all-new design that was supposed to replace BMW's traditional flat-twins, the K100 arrived for 1984 restating the virtues of solidity, comfort and exemplary build quality long associated with the marque. An 8-valve twin-cam unit displacing 998cc, the brick-like four-cylinder motor was laid on its side, lowering the centre of gravity, and mounted fore-and-aft to facilitate the retention of BMW's characteristic shaft drive. Bosch electronic fuel injection was employed and the long-stroke four developed its maximum output of 90bhp at a relatively low 8,000rpm. The K100 spawned a 750cc three-cylinder variant (the K75) and in 1992 was enlarged to 1,092cc, having gained a 16-valve cylinder head along the way. Model designations were carried over from the large-capacity twins: the K100RS being the top-of-the line sports roadster and the K100RT the tourer. Although somewhat down on power compared with Japanese opposition, the K100RS nevertheless had a top speed of around 120mph while cosseting its rider with superior comfort and better wind protection.

Finished in a beautiful shade of green, this K100RS currently displays a total of 26,185 miles on the odometer and was last taxed (in the Isle of Man) until 30th April 2017 (it should be noted that the HPI records it as originally black). The old IoM registration document records the previous UK registration as 'E52 KUW' (still recorded on the HPI but marked as being exported in 1994, which coincides with it being registered in the IoM). The machine is offered with a current IoM registration document and a copy of the rider's handbook (NB: the details recorded appear to relate to another machine that was registered in 1986; this example was first registered in 1987). Frame and engine numbers match the HPI. The engine turns over. Offered with panniers.

Following a period of inactivity, this motorcycle will require recommissioning and/or restoration to a greater or lesser extent before returning to the road and thus is sold strictly as viewed. Prospective purchasers should satisfy themselves with regard to this motorcycle's completeness, history, authenticity, originality and mechanical condition prior to bidding.
Offered with key

Footnotes

BUYER'S PREMIUM
The Buyer's Premium for this Lot is 15%+VAT on the first £500k of the Hammer Price, and 12%+VAT on the balance thereafter.

All lots are sold 'as is/where is' and Bidders must satisfy themselves as to the provenance, condition, age, completeness and originality prior to bidding.

CONDITIONS OF SALE, AUCTION INFORMATION & GUIDE FOR BUYERS
Please see the 'CONDITIONS OF SALE, AUCTION INFORMATION & GUIDE FOR BUYERS' at the top of the main sale page (Motorcycles Online - The Summer Sale) for all pertinent information regarding bidder's obligations, viewing, bidding, payment, post-sale collection & transportation.

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Saleroom notices

The full frame number is 0144648 K100RS. The full engine number is 104EA 1787 2105.

Additional information

This auction is now finished. If you are interested in consigning in future auctions, please contact the specialist department. If you have queries about lots purchased in this auction, please contact client services.
Buyers' Obligations
ALL BIDDERS MUST AGREE THAT THEY HAVE READ AND UNDERSTOOD BONHAMS' CONDITIONS OF SALE AND AGREE TO BE BOUND BY THEM, AND AGREE TO PAY THE BUYER'S PREMIUM AND ANY OTHER CHARGES MENTIONED IN THE NOTICE TO BIDDERS. THIS AFFECTS THE BIDDERS LEGAL RIGHTS.
If you have any questions about the Conditions of Sale, please contact your nearest client services team.
From 28 June 2025, the import into the EU of non-EU property of a certain age (and in some categories above a certain value) is subject to additional requirements. Under the relevant EU Regulation, it is the Buyer's sole responsibility to assess whether any Lot meets the criteria for import into the EU. The refusal of any required Import License or Importer Statement, or any delay in obtaining such License or Statement shall not give rise to the rescission or cancelation of any Sale, nor allow any delay in making full payment for the Lot.
Buyers' Premium and Charges
Like the vast majority of auctioneers Bonhams charge a Buyer's Premium on the Hammer Price of each Lot purchased and this is subject to VAT. Some lots may also be subject to VAT on the Hammer Price and these lots will be clearly marked with a symbol (†, Ω, *) printed beside the lot number.
For Automobilia the Buyer's Premium is 28% on the first £40,000 of the hammer price; 27% of the hammer price of amounts in excess of £40,001 up to and including £800,000; 21% of the hammer price of amounts in excess of £800,001 up to and including £4,500,000 and 14.5% of the hammer price of any amounts in excess of £4,500,001.
For Motor Cars and Vehicle Registration Numbers the Buyer's Premium will be 15% on the first £500,000 of the hammer price of each Lot, and 12% on the balance thereafter.
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VAT at the standard rate is payable on the Buyers Premium by all Buyers, unless otherwise stated.
Payment Notices
For payment information please refer to the sale catalog.
Shipping Notices
For information and estimates on domestic and international shipping as well as export licences please contact Bonhams Shipping Department.
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