1930 Sunbeam 493cc Model 9 Frame no. D9326 Engine no. LL5235

This lot has been removed from the website, please contact customer services for more information

Lot 472
1930 Sunbeam 493cc Model 9
Registration no. PO 3434 Frame no. D9326 Engine no. LL5235

Sold for £ 5,520 (US$ 7,773) inc. premium
1930 Sunbeam 493cc Model 9
Registration no. PO 3434
Frame no. D9326
Engine no. LL5235
Sunbeam had begun experimenting with overhead valves on their factory racers in the early 1920s and these duly appeared on production models in 1924. The new 500 roadster was known as the Model 9 while its race bike counterpart, which could top 90mph, was accordingly designated the Model 90. The John Greenwood design was advanced for its day, with a specification which included a crankshaft supported by three ball-bearings, dry-sump lubrication, and primary drive enclosed in an cast alloy chaincase. Power was transmitted by single-row chain to a three-speed, 'cross-over drive' gearbox with offside power take off.

The overhead-valve Model 9's frame and cycle parts, which had much in common with those of Sunbeam's larger side-valve models, evolved slowly. Sunbeam missed the industry's virtually wholesale switch from flat-tank to saddle-tank frames for the 1928 season, and a saddle-tank version of the Model 9 did not appear until September of that year. Changes to the Model 9's engine were confined mainly to its top-end. The early flat-tankers featured a straight-ahead exhaust port, a peculiarity which necessitated the adoption of a bifurcated down-tube. Later on in the 1920s Sunbeam followed the then-fashionable trend to twin-port 'heads before reverting to a single-port design. Pushrod enclosure had arrived by 1930 to be followed a couple of years later by partial enclosure of the rocker gear.

This Vintage-era example was purchased by its late owner in May 1991 and was last used four years ago, since when it has been dry stored. Refurbishment carried out has included a +0.010" re-bore and fitting new main bearings, valves, gearbox bearings, mudguards, wheel rims, spokes, tyres and inner tubes, all of which was done by the previous owner, Mr D W Lyon, who acquired the Sunbeam in 1983. The machine is offered with sundry invoices and Swansea V5. Re-commissioning and the customary safety checks are advised before returning it to the road.
1930 Sunbeam 493cc Model 9 Frame no. D9326 Engine no. LL5235
1930 Sunbeam 493cc Model 9 Frame no. D9326 Engine no. LL5235
Auction information

This sale is now finished. If you are interested in consigning in future sales, please contact the specialist department. If you have queries about lots purchased in this sale, please contact customer 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 complaints or questions about the Conditions of Sale, please contact your nearest customer services team.

Buyers' Premium and Charges

Like the vast majority of auctioneers Bonhams charge what is known as a Buyer's Premium. Buyer's Premium on all Automobilia lots will adhere to Bonhams group policy:

25% up to £50,000 of hammer price,
20% from £50,001 to £1,000,000 of hammer price,
and 12% on the balance thereafter. This applies to each lot purchased and is subject to VAT.

For Motor Cars and Motorcycles a 15% Buyer's Premium is payable on the first £50,000 of the final Hammer Price of each Lot, and 12% on any amount by which the Hammer Price exceeds £50,000. VAT at the standard rate is payable on the Premium by all Buyers, unless otherwise stated.

Some lots may be subject to VAT on the Hammer Price. These lots will be clearly marked with the relevant symbol printed beside the lot number in the catalog.

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 licenses please contact Bonhams Shipping Department.

App