2007 Yamaha Apex Factory Service Manual, Page 295Get this manual

2007 Yamaha Apex Factory Service Manual, Page 295

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MAINTENANCE SPECIFICATIONS Model Valve dimensions: Valve head diameter Intake Exhaust Valve face width Intake Exhaust

0.5 0.9 mm (0.020 0.035 in) 0.5 0.9 mm (0.020 0.035 in)