mxu 500 irs efi Manuale-dofficina : Pagina 153

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          8. CYLINDER HEAD/VALVES                           MXU 500 IRS



 Camshaft

 Support both ends of the camshaft with V-
 blocks and check the camshaft runout with a
 dial gauge.

 Service limit: 0.05 mm




 Inspect camshaft lobes for
 pitting/scratches/blue discoloration.

 Measure the cam lobe height.

 Service Limits: IN : 37.11 mm
                 EX: 36.86 mm

 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.




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