The Ariel Square Four, announced in 1931, was a genuinely ground-breaking design. It was introduced as an overhead-camshaft 500cc, with two gear-coupled crankshafts and a square four-cylinder layout. The following year it was offered in both 500 and 600cc capacities. At the time it was as radical as any design before or since and was the creation of the great Edward Turner. The vendor of this machine was in possession of most of the bike but was missing a frame and unable to locate one. He was, however, able to acquire a new, reproduction frame which was built with measurements from an original frame and cast lugs as per original. Combined with the original parts he possessed; he was able to rebuild the machine. The engine, four-speed Burman gearbox, forks, wheels etc. are all original items, and even the petrol tank is modified from another Ariel model from 1931. He advises us that he stripped and rebuilt the engine with new valves, valve springs, and oil pump body. He further advises that the big ends, bores, pistons, and camshaft were all in useable condition. Whilst all four gears select, he states that the gearbox layshaft needs replacing to facilitate the speedo drive, and a used one is included with the bike. The magneto requires reconditioning, and there are no internals in the dynamo. In need of completion, this machine will provide a new owner with a budget-level entry to the normally expensive world of early Square Four ownership. Documents with this lot comprise a copy parts book and copy handbook.

This motorcycle is to be auctioned at our Live and Online Winter Sale, Hanger 113, Bicester Heritage, OX26 5HA.

SALE TIMES

Friday 11 December
Spares & Memorabilia (Lot 1 - 112) 9am
The National Motorcycle Museum Reserve Collection (Lots 201 – 252) 11am


Saturday 12 December
Motorcycles (Day 2) (Lots 501 – 708) 10am



VIEWING
In light of the current government guidelines and relaxed measures we are delighted to welcome viewing, strictly by appointment. All the lots will be on view at Bicester Heritage in our traditional Hangar 113. We will ensure social distancing measures are in place, with gloves and sanitiser available for clients wishing to view motorcycle history files.


Please contact Bonhams Motorcycles by clicking 'Message the seller' with your preferred date, time and vehicle registration number to book an appointment.


VIEWING TIMES
Wednesday 9 December 9am to 5pm
Thursday 10 December 9am to 5pm
Friday 11 December 9am to 5pm (Lots 501 – 708 only)


LIVE AND ONLINE AUCTION

Please note that whilst public viewing is available by appointment, the auction itself will be conducted from a remote saleroom, behind closed doors without public access, in accordance with the current government guidelines. All bidding will be conducted via Online, Telephone and Absentee Bidding. Please contact our Bids Department to register using the 'Message the seller' button.


COLLECTION OF PURCHASED LOTS

Motorcycle lots must be cleared from the sale venue by 2pm Sunday 13 December 2020. Limited collection is available until 2pm Monday 14 December, by appointment only. If collecting Monday, please access Bicester Heritage via the 'Main Gate', Buckingham Road, OX26 5HA. Please email us using the 'Message the seller' button with your collection or transport instructions as soon as possible following your successful bid. Failure to instruct Bonhams by the given time will result in your vehicle being uplifted to store at your expense, as detailed in the Conditions of Sale. Buyers should satisfy themselves that they have collected all relevant log books, documents and keys relating to their Lot(s) at time of collection.


AUCTION ADDRESS

Hangar 113
Bicester Heritage
Buckingham Road
Bicester
Oxfordshire
OX26 5HA