WM1x21 (f), WM2x20 (r). Rear, QD with taper roller bearings. Chrome rims. Rear sprocket integral with brake drum on LHS.
Plain inverted U section, unvalanced. Rear, two piece with detachable main section. Front & rear with flared ends.
‘Aero’ type petrol tank chrome plated and painted panels with reserve tap. Single central CEE-ESS type filler with rear fitted petrol balance pipe. Two bolt damper arm fixing. . Large cut aways underneath both sides to clear rocker box.
4 valve 499cc with RR50 aluminium enclosed valve cylinder head (with 8 fixing bolts for rocker box), parallel inlet valves and radial exhaust. 14mm central plug. BTH KD1 D4 magneto and DM3G dynamo. Oil feed to cylinder.
8” front and 7.5” rear, coupled with aluminium shoes.
Miller 8” headlamp with No 832 8-0-8 'Lighthouse' ammeter and 35E rear lamp. HF180 Clearhooter electric horn.
4 speed gearbox with foot change on RHS. Aluminium oil bath chaincase with ‘R’ on dome and no separate filler on shock absorber dome.
Amal type 29/146 or 229/146 with Binks twist grip control
Twin 1 3/4” low-level downpipes into barrel silencers and plain tailpipes.
120MPH illuminated speedometer. Lycett 6B pillion pad. Mechanism shield, battery cover, licence holder, cast central stand with lifting handle. 7/8” handlebars with long front brake lever. Single toolbox fitted to RHS of machine. Steering damper and handwheel operated fork shock absorber. Round tubed forks.
Upswept exhaust pipes. ISDT rear wheel. Blue or Maroon paint finish to mudguards and petrol tank.