8. CYLINDER HEAD/VALVES UXV 500 Camshaft Support both ends of the camshaft with V- blocks and check the camshaft runout with a dial gauge. Service limit: 0.05 mm (0.002 in) Inspect camshaft lobes for pitting/scratches/blue discoloration. Measure the cam lobe height. Service Limits: IN : 37.11 mm (1.4844 in) EX: 36.86 mm (1.4744 in) If any defects are found, replace the camshaft with a new one, then inspect lubrication system. Check the decompression system by turning the decompressor cam on the exhaust camshaft. You should be able to turn the decompressor cam clockwise smoothly, but the decompressor should not turn counterclockwise. 8-10