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Oversize rings available
Compression ring top 0.254 mm (0.010 in)
Compression ring bottom 0.254 mm (0.010 in)
Oil scraper ring 0.254 mm (0.010 in)
Gudgeon pin
Diameter 14.283-14.288 mm (0.5623-0.5625 in)
Small end bush
Bore 14.292-14.298 mm (0.562-0.563 in)
Camshaft
Bearing diameter 38.66-38.67 mm (1.521-1.522 in)
Bearing clearances 0.0254-0.0889 mm (0.0010-0.0035 in)
End float 0.064-0.16 mm (0.0025-0.0065 in)
Chain pitch 9.525 mm (0.375 in)
Number of pitches 50
Valves
Seat angle 45°-45°30'
Seat width
Inlet 1.397-1.524 mm (0.055-0.060 in)
Exhaust 1.397-1.524 mm (0.055-0.060 in)
Valve lift 25.42 mm (1.00 in)
Valve guide lengths (inlet and exhaust) 41.4-41.66 mm (1.63-1.64 in)
Valve guide clearance 0.0381-0.0889 mm (0.0015-0.0035 in)
Valve springs
Free length 39.62mm (1.56 in)
Fitted length and load 34.11 mm (1.343 in) at 17.01 kg (37.5 lbs)
Length and load valve open 28.6mm (1.125 in) at 39.6 kg (87.3 lbs)
Flywheel
Material Chromium cast iron
Diameter 246.126 mm (9.69 in)
Starter ring
Number of teeth 100
Diameter over teeth 257.81 mm (10.15 in)
Crankshaft identification
Colour code -0.254mm (-0.010 in) - red
-0.508 mm (-0.020 in) - blue
-1.016 mm (-0.040 in) - green