1928 Dunelt 249cc Model K Royal Frame no. 7987 Engine no. K7703
Lot 113
1928 Dunelt 249cc Model K Royal
Registration no. RL 8240 Frame no. 7987 Engine no. K7703
Sold for £4,140 (US$ 6,760) inc. premium

Lot Details
1928 Dunelt 249cc Model K Royal Frame no. 7987 Engine no. K7703 1928 Dunelt 249cc Model K Royal Frame no. 7987 Engine no. K7703 1928 Dunelt 249cc Model K Royal Frame no. 7987 Engine no. K7703 1928 Dunelt 249cc Model K Royal Frame no. 7987 Engine no. K7703
1928 Dunelt 249cc Model K Royal
Registration no. RL 8240
Frame no. 7987
Engine no. K7703
The first Dunelt of 1919 was unusual in being powered by a 499cc two-stroke single at a time when 350cc was considered the maximum capacity for such an engine, and even more so by virtue of its stepped piston, which was of larger diameter at the bottom than the top. On its way up, the piston drew 770cc of charge into the crankcase and on its way down forced it via the transfer ports into the 499cc cylinder, thereby achieving a measure of supercharging. By the end of the 1920s the original 499cc model had gone but the firm continued to offer a 249cc version of the stepped-piston engine in the Model K, which first appeared in 1925 and set two Double Twelve-Hour World Records at Brooklands, the second in September 1928.
This Model K Dunelt was purchased by the current vendor in 1978 from an auction of un-restored vintage vehicles in Wadebridge, Cornwall. The original sales catalogue (copy on file) states that the Dunelt had been 'used in London to Lands End trials by Mr Kirkland, Wadebridge' (the vendors father). Restored between 1979 and 1981, the machine was used subsequently only for outings to shows, the last such occasion being in 1997. Since then this rare Vintage-era two-stroke has been dry stored and started only occasionally. Now in need of sympathetic re-commissioning, 'RL 8240' is offered for sale together with spare Binks carburettor jets and other items including a Dunelt range catalogue, instruction book, two old-style buff logbooks and an old-style V5 registration document.
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