Inclined OHV Engine (single port model)
Engine. 4.93 h.p., 80 x 98 m/m bore and stroke. Enclosed roller bearing with return springs. Enclosed push rods, adjustable return springs. big end bearing, pressure oil-fed. Low compression piston standard. High compression piston can be fitted if specified. Two spare valve springs supplied.
Silencer. Large plated silencer, with fish tail, conforming to Brooklands regulations.
Carburetter. Amac TX. Twist grip control to throttle if specified.
Lubrication. Oil sump integral with crank case. Capacity 3 pints. Submerged gear pump, visible tell-tale. Surplus oil in crank case returned to sump by scraper acting on flywheels. Oil level gauge. Additional oil tank on seat tube extra,
Transmission. Front chain, ½in.× .305in., enclosed in two-part case. Rear chain, 5/8in.× 3/8 efficiently protected. Cam-faced cush drive fitted to engine shaft.
Gear Box. Special pivot mounting. A special close or wide ratio gear box can be fitted if specified.
Frame. Duplex cradle frame. Head fitted with B.S.A. steering damper. Detachable carrier extra. Spring up rear stand.
Handlebar. Sporting type (reversible) mounted behind steering bead, with long rubber grips.
Tank. Saddle type for fuel only. Capacity : 2¼ gallons. Adjustable rubber knee grips fitted.
Tyres. Dunlop Cord, 26in.× 3.25in., W.O. 26in.× 3in. W.O. tyres can be fitted if specified. 27in.× 4in. tyres, with front mudguard extra.
Brakes. 7in. diameter. taper roller bearings to both hubs. Rear brake quickly adjustable.
Saddle. Spring seat.
