The ’58 Ariel Cyclone utilized a high-compression version of the Huntmaster engine, a BSA 650 twin. It was a two-year-only model (1958-1959) and just 175 examples were believed produced in total. The Cyclone got new, hotter camshafts, a new crankshaft with bigger bearings (common to both BSA and Ariel) and the compression ratio was upped a point to 8.25:1. Resulting in, as a major two-page Cyclone ad read, “Ariel Cyclone 40 Cubic Inch Twin with 40 Full Horsepower”. The look was different, with the Cyclone wearing Glamour Red paint instead of the Burgundy. Lots of chrome, from the narrow sporty fenders to the trim on the tank, along with lots of polished alloys and a fully enclosed main chain guard.  The BSA timing case got a new design with the words “Six TWIN Fifty” written on the side…to distinguish from the Standing Arms on the 650 BSA twin.The Ariel Owners Motorcycle Club: has documented out of 175 “definite” Cyclones produced and a further 76 “possibles,” this machine is number 8 in a sequence of the “definite” machines. For the record, Buddy Holly’s bike was number 3. This Cyclone was shipped from Ariel’s Selly Oak, Birmingham, England, factory on Dec. 4, 1957, bound for BSA New York, the East Coast distributor. The seller traced the history of the Cyclone’s ownership back to 1971.
Frame #: CAPR 10935, Engine #: CNLF4619 HC8 / Departed Shelley Oak, 4th December 1957 / 982 miles (original miles unknown) since meticulous restoration to original specifications
Most components sourced from Draganfly / New rims and Stainless spokes from CW / Exhaust pipes and silencers from Armours
Chronometric speedo professionally refurbished / New +40 thou pistons and rods, dynamically balanced with crankshaft / Frame powder coated / Fuel tank epoxied / External Cartridge oil filter added
NOS Lucas Type 529 tail-light (rare as hen’s teeth) / Brightspark condenser/capacitor for a healthy magneto spark / Avon tyres ( front is Speedmaster MK11 rib style and rear is a MK11 block style, both tries are made in the UK. )
This bike featured in Motorcycle Classics September/October 2015 (one copy will be supplied with the sale), https://www.motorcycleclassics.com/classic-american-motorcycles/1958-ariel-cyclone-zmmz15sozhur/ and Cheval de Fer (Ariel Club magazine) April 2016.
The owner has scanned the Ariel Factory despatch records, available to the buyer, line #10 is the seller’s bike which read (over two pages): Agent BSA Inc New York, Engine Star CNLF4619, Frame no 10935, Tab no 9033, Model FH. Speedo 120, Details USA Bars, High Compr 8.3-1, Sports, Dunlop Tyres, Glamour Red, Date 4-12-57 (i.e. 4th Dec 1957 in British date format). These specifications prove the bike is a Cyclone. The owner is not sure what the word “Star” next to the engine number means, but it might indicate the hotter cam.

The bike is located in Qualicum Beach, BC and is titled in the seller’s name. If shipping is required this can be arranged by Robins Classic Motorcycles, at the buyer’s expense.