Yamaha MX-800, Service Manual

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SPECIFICA
T
IONS
MAINTENANCE SPECIFICATIONS
Crankshaft:
Big end side clearance 0.20–0.65 mm (0.0079–0.0256 in)
Runout limit 0.03 mm (0.0012 in)
Crank pin outside diameter 40.950–41.050 mm (1.6122–1.6161 in)
Connecting rod:
Small end diameter 19.006–19.020 mm (0.7483–0.7488 in)
Oil clearance 0.006–0.025 mm (0.0002–0.0010 in)
Big end diameter 40.005–40.020 mm (1.5750–1.5756 in)
Oil clearance 0.016–0.046 mm (0.0006–0.0018 in)
Limit 0.09 mm (0.0035 in)
Camshaft:
Camshaft lobe dimensions
Lobe height (Intake) 32.885 mm (1.2947 in)
Limit 32.785 mm (1.2907 in)
Lobe height (Exhaust) 33.957 mm (1.3369 in)
Limit 33.857 mm (1.3330 in)
Base circle diameter (Intake) 26.000 mm (1.0236 in)
Limit 25.900 mm (1.0197 in)
Base circle diameter (Exhaust) 26.000 mm (1.0236 in)
Limit 25.900 mm (1.0197 in)
Camshaft journal diameter 16.965–16.990 mm (0.6679–0.6689 in)
Limit 16.950 mm (0.6673 in)
Valve:
Valve dimensions
Valve head diameter (Intake) 27.9–28.1 mm (1.0984–1.1063 in)
Valve head diameter
(Exhaust) 34.9–35.1 mm (1.3740–1.3819 in)
Valve stem diameter (Intake) 5.948–5.963 mm (0.2342–0.2348 in)
Valve stem diameter (Exhaust) 5.940–5.955 mm (0.2339–0.2344 in)
Limit (Intake) 5.918 mm (0.2330 in)
Limit (Exhaust) 5.910 mm (0.2327 in)
Valve stem length (Intake) 88.8 mm (3.4961 in)
Valve stem length (Exhaust) 89.8 mm (3.5354 in)
Valve face contact width
(Intake) 0.9–1.1 mm (0.0354–0.0433 in)
Valve face contact width
(Exhaust) 0.9–1.1 mm (0.0354–0.0433 in)
Limit (Intake) 1.6 mm (0.063 in)
Limit (Exhaust) 1.6 mm (0.063 in)
Valve seat contact width
(Intake) 0.9–1.1 mm (0.0354–0.0433 in)
Valve seat contact width
(Exhaust) 0.9–1.1 mm (0.0354–0.0433 in)