8 h.p. engine, spring frame, including spring sidecar wheel, interchangeable wheels and Magdyno, are included in the specification of the Clyno.
Clyno. (Stand 141.)
8 h.p.; 76x102 mm. (925 c.c); V twin four-stroke; side-by-side valves; mechanical lubrication; Amac carburetter; T.B. chain-driven magneto; three-speed constant mesh type gear; enclosed chain drive; spring frame; Dunlop 28 x 3 in. tyres.
Clyno Eng. Co., Ltd., Pelham Street, Wolverhampton.
Nature decrees that we desire most earnestly the unattainable. For this reason close interest in the 8 h.p. Clyno has been and is intense, and now that deliveries are definitely commencing, that interest, by reason of the sheer completeness of the design, will not flag of Clyno manufacture and design, the engine has detachable cylinder heads and a carefully planned system of mechanical lubrication. In addition a hand pump may be used at will to supply extra oil either to the crank case or to the constant mesh type gear box. The spring frame is simplicity itself, and includes the carrier in its total of sprung weight. Detachable and interchangeable wheels naturally find a place in the standard specification; removal of the rear wheel leaves the internal expanding rear brake in situ, also, of course, the transmission. Mudguarding is literally on car lines, and to car dimensions. The modele de luxe has full electrical equipment; but even the standard machine is exceptionally complete. War and peace have provided experience and testing grounds for the Clyno designers, of which they have not been slow to take advantage.
2½ h.p.; 70x70 mm. (269 c.c); single-cylinder two-stroke; drip feed lubrication; Amac carburetter; gear-driven magneto; two-speed gear integral with crank case; belt drive; 26x2in. tyres.
Right at the other end of the scale the Clyno lightweight is as complete and clever in its design as is the big passenger outfit. The integral gear box find inclined two-stroke engine are well-known features, but the fact that, including the magneto pinion, only five gear wheels are used in the primary drive and gear box is worthy of especial note, and is indeed significant of the simplicity that is maintained throughout the whole machine.
Olympia Show. The Motor Cycle, December 2nd, 1920. Page 707
"Are there any articles or mention of the rare Clyno 2 stroke model with a displacement of over 300cc instead of the usual 269cc?
I had not heard of the smaller motor until I posted a picture that came from a glass negative I bought on Ebay. An eagle eyed gent spotted the Clyno with the sidecar was belt drive, and not the usual all chain drive twin, and he mentioned that the sidecar looked like a lightweight version that could be attached to a two stroke Clyno. I can't remember the displacement, it was 315cc or 325cc, and was said to have been a very limited production run. Bob Curry from one of the classic bike magazines mentioned he had a 2 stroke Clyno, and that the top of the cylinder had broken off the base spigot, and rendered it useless, so the extra capacity may have exacerbated this flaw and the model was dropped, and not mentioned in polite company thereafter."
Howard Burrows replied, "...there is one of these featured in Titch Allen's Vintage Road Test Journals"
The displacement turned out to be 76mm bore x 70mm. stroke or 317.6 cc swept volume.
Gerard Pentland in Early Motorcycle Literature
