4 cylinder, four stroke, water cooled die cast aluminium cylinder block with removable cast iron liners. Die cast aluminium cylinder head with valve seats for lead free applications and cast iron valve guides. Forged steel counter-balanced crankshaft mounted on 3 lead bronze steel-backed bearings. Forged steel connecting rods mounted on lead bronze steel-backed bearings.

Bore: .........................................62.50 mm (2.46 in)

Stroke: ........................................69.09 mm (2.72 in)

Firing order: ................................1, 3, 4, 2

Crankcase ventilation: ................Sealed unit - breathing into carburettor

Engine mounting: ........................4 point suspension on rubber mountings (2 on gearbox)

Clutch: ........................................159 mm (6-1/4 in) Dry single plate

Carburettor: .................................SU HS2

Fuel pump: ..................................Mechanical

Air cleaner: ..................................Paper element

Oil filter: .......................................Full flow, replaceable

Water pump: ...............................Centrifugal, belt driven

Fan: .............................................Mechanical, 254 mm (10 in) 3 blade

Electrics: ....................................12V, negative earth

Alternator: ...................................A127/45, 45 amp output

Starter motor: ..............................Pre-engaged type

Distributor: ..................................Sliding contact breaker points

Drive: ..........................................Skew gear from camshaft

Ignition advance: ..........................Centrifugal and vacuum

OVERALL DIMENSIONS:

Length - fan to flywheel: ...................... 493 mm (19.4 in)

Height: ................................................. 610 mm (24.0 in)

Width: ................................................. 417 mm (16.4 in)

Weight - dry: ........................................ 58 kg (128 Ibs)

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