Engine 500 C.C. J.A.P. O.H.V. Speedway engine 80 m/m bore x 99 m/m stroke. This engine has the lowest lb.weight per brake horse power developed of an unsupercharged engine on the world market.Weight: 59 lb. met. Output : 39,5 B.H.P. at 6,000 R.P.M. Compression ratio : 14:1 use on alcohol fuel. Lubrication By double delivery Pilgrim Oil Pump with separate feed to rocker box and valve stems. Carburettor AMAL Twin Float racing carburettor type 27/013 Magneto B.T.H. KDt.C.6 special racing type with waterproof end cover. Frame EXCELSIOR design built with specialstel tubing and proved by experience to the first-class in service and Control.Finished troughout in chromium plate. The machine illustred is fitted with Mark II frame. Front Forks Special Excelsior design Telescopic FORKS,all steel construction,and with high quality tubing, adjustable as to spring tension an trail Footrest Adjustable on off side only Kneehook Adjustable with rubber covering. Handlebars Specially strong light steel,chromium plated. Cinderguards Guard on front down tube to keep flying cinders from rider an cylinder head.Rear guard fitted with side valance,both chromium platet. Fuel Tank Strongly built with good quality sheet steel,specially supportet at points of attachement,finished in chromium Oil Tank Fitted to rear stays in accessible position.capacity 1 pint,chromium plated Exhaust Pipe Large diameter exhaust pipe fitted to R.H. side of machine.rigidly mounted with two clips an slotted to comply with A.C.U. regulations. Transmission & Clutch 1/2 in.x.303 in. Renold to single-speed countershaft of EXCELSIOR exclusive design an very robust construction.fitted with special heavy duty multiple plate clutch, Ferodo lined.Thence by 3/4 in. x 1/4 in..Renold chain to rear driving sprocket. standart gear ration of 8,93 : 1 can by varied as desired by exchanging sprockets. Wheels Strongly built of heavy gauge spokes with steel nipples and stell rins,to withstandabnormal strain,chromium plated. Tyres Dunlop Speedway 2.75 in. x 23 in.front 2.75 in. x 22 in rear.Twosolid security bolts fitted to rear wheel. Lifting Handle On rear guard,finish chromium plated. Price complete machine,including chromium plated Frame,forks,guards,stays,oil and petrol tanks,wheel rims,handlebars and exhaust pipe,with all accessories and ready for racing: £ 215.0.0 plus Purchase Tax £ 58.1.0
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