WM1x21 (f), WM1x21 (r) wired on type, interchangeable small flange (dog drive hubs) with nickel plated rims, spokes & hubs.
Short back (5”D section) and front ‘D’ section, nickel plated.
Bright red enamelled of soldered construction. Fuel tank fitted inside frame tubes tapers front to rear to fit within frame struts. Oil tank fixed to rear frame downtube. Screw fillers to both tanks.
Based on the 1929 Ulster - 4 valve 499cc with iron open valve parallel inlet & parallel exhaust cylinder head. 1.5" exhaust port diameter, 18mm central plug. Rockers supported in large nuts in rocker plates bolted to the cylinder head. Forward mounted ML magneto. Square based cylinder barrel and webbed (6) drive side crankcase. Total loss oiling with vertical adjustable ‘pump’ in timing cover. Oil feed to rear of cylinder.
Rudge 1927/8 pattern closed ended with brake anchor attachments removed. Nickel plated.
Gearbox countershaft with clutch and dog drive rear hub. 1/2”x 0.305 chains.
Sports type Amac 10MDY with quick action twist grip.
Two shortish 1.5" nickel plated open pipes, longer than 1928 possibly finishing together on the off side of the machine #.
Semi strutted with struts from the rear wheel to the front of the crankcase and from the crankcase to the steering head (special frame lug). Special kneehook lug. Special frame lug (unused) under saddle. Frame numbered in Rudge sequence. Steering head fork stop machined off.
1” non adjustable nickel plated handlebars with André type steering damper. Riveted angle & strip steel centre stand and magneto cut out on handlebars.
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