Lot 387 - 1929 BSA L29 350cc Sloper

Lot 387 - 1929 BSA L29 350cc Sloper

Lot 387 - 1929 BSA L29 350cc Sloper

Lot Number 387
Registration SV4580
Chassis Number J681
Engine Number D2479
Estimate £4,500 - £6,500
Result Sold - £6,160

The BSA Sloper, so named because of its inclined cylinder configuration, was launched in 1927 and was designed by Harold Briggs, who had joined BSA from the Daimler car company. Initially available only as a 500 (or S series), the Sloper was a very influential design, with two of its key features becoming widely copied;  the inclined engine (hence the name 'Sloper') and the saddle tank, which enabled a low seating position, improving the centre of gravity and handling.

The first models featured a 493cc (80x98mm) engine and a single port cylinder-head, topped by a cast-aluminum cover for the rockers but featuring  exposed valve springs. Alongside the cast iron cylinder barrel were plated tubes to cover the pushrods. Gentle camshaft contours and wide bases on the tappets helped to achieve a quiet and smooth running engine and the large crankcase accommodated a big and heavy flywheel, to aid low speed torque. The gearbox contained three speeds and the wet sump lubrication system featured separate, hand operated metering. Offering good performance and handsome looks, the Sloper quickly established itself as a rider's favourite. There was also the option of a specially tuned engine with higher compression ratio and special cams.

A 349cc (L series) version was offered from 1929 and the engines now featured a fashionable two port cylinder head with twin exhausts and fishtail silencers. For 1930 chrome plate replaced nickel on all the bright work and there was a new frame with a forged steel spine in place of the previous duplex type.  The Sloper range had increased to six models by 1930 but was reduced thereafter and by the time of the Sloper's demise in 1935 there were just two models, both of 595cc; one overhead-valve, the other, a side -valve.

This rare 1929 L29 model 350 was actually delivered in December 1928 to a Mr. Waldson, according to the factory despatch records. It was recorded as being in Pembrokeshire from 1992 until 2008 when it was purchased by the vendor who, after riding a Sloper at the VMCC Training Day at Curbourough in 2007, said he was so impressed by the forgiving nature of the Sloper that he decided he must have one. It has since been used in many VMCC events including the prestigious Banbury Run in 2009, 2012 and 2013. Work done to the BSA, while in the vendor's hands, includes an engine overhaul involving the fitment of a new piston, cylinder liner, valves , springs and guides; a rebuild of the Lucas MDB1 magdyno and renewal of the steering head bearings.  The BSA comes with a V5C and a history file which includes receipts for the work described above.

Ready for a new owner to ride and enjoy, the BSA is offered for sale at a very attractive estimate.

Interested parties should satisfy themselves as to the description and condition of each lot prior to the sale. Accordingly, buyers are on notice that each vehicle is offered ‘as is/as seen’ subject to the Terms and Conditions for the auction. Buyers are advised to inspect the vehicle in person or use a professional to carry out this service. Historics will not entertain disputes over descriptions.

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