TECHNICAL DATA
Bore 59 m.m.
Stroke 72 m.m.
Capacity ... 197 c.c.
Compression ratio (Std.) 7.25: 1
Compression ratio (Trials & Sports)... 8.25: 1
Engine Sprocket 20 teeth x 3/8" pitch
Clutch Sprocket 43 teeth x 3/8" pitch
Primary Drive Ratio 2.15-1
Gearbox Ratios 3-speed and 4-speed.. See tables on page 48.
Final Drive Sprocket (Standard) 18T x 1/2" pitch x .295" wide
Final Chain Line 2 1/2"
Carburetter Villiers type S.25
Carburetter Needle No. 3 1/2. Set 1.95" out
Throttle (Carburetter) No. 3
Sparking Plug Lodge H.H.14
Lubrication, Engine Petroil mixture. 1 part to 20 parts.
Lubrication, Gearbox Castrol XL (SAE.30) oil.
... ... Chaincase Castrolite (SAE.20) oil.
Bore 59 m.m.
Stroke 63.5 m.m.
Capacity ... 173 c.c.
Compression ratio (Std.) 7.4:1
Compression ratio (Trials & Sports) --
Engine Sprocket 20 teeth x 3/8" pitch
Clutch Sprocket 43 teeth x 3/8" pitch
Primary Drive Ratio 2.15-1
Gearbox Ratios 3-speed and 4-speed... See tables on page 48
Final Drive Sprocket (Standard) 17T x 1/2" pitch x .295" wide
Final Chain Line 2 1/2"
Carburetter Villiers type S.22
Carburetter Needle No. 31. No. 4 Groove
Throttle (Carburetter) No. 21
Sparking Plug Lodge H.H.14
Lubrication, Engine Petroil mixture. 1 part to 20 parts.
Lubrication, Gearbox Castrol XL (SAE.30) oil.
... ... Chaincase Castrolite (SAE.20) oil.
Bore 57 m.m.
Stroke 58 m.m.
Capacity 148 c.c.
Compression ratio (Std.) 7.75: 1
Compression ratio (Trials & Sports)...
Engine Sprocket 20 teeth x 3/8" pitch
Clutch Sprocket 43 teeth x 3/8" pitch
Primary Drive Ratio ... 2.15-1
Gearbox Ratios 3-speed and 4-speed... See tables on page 48
Final Drive Sprocket (Standard) 16T x 1/2" pitch x .295" wide
Final Chain Line 2 1/2"
Carburetter Villiers type S.19
Carburetter Needle No. 31. Set 31/32" out
Throttle (Carburetter) ...No. 21
Sparking Plug Lodge H.H.14
Lubrication, Engine Petroil mixture. 1 part to 20 parts.
Lubrication, Gearbox Castrol XL (SAE.30) oil.
... ... Chaincase Castrolite (SAE.20) oil.
