Index Snowmobiles / ATV Snowmobile Polaris 440 PRO X Fan, 440 PRO X, 600 PRO X, 700 PRO X, 800 PRO X - service manual 2003 year
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ENGINE 2.56 Piston Inspection/Measurement 1. Check piston for scoring or cracks in piston crown or 2. Measure piston outside diameter at a point 10 mm s) up from the bottom of the skirt at a 90q angle to the direction of the piston pin (domestic engines). s (12.7mm) up from the bottom of the piston skirt. Record the measurement for each piston. NOTE: The piston must be measured at this point to 3. Subtract this measurement from the minimum If clearance exceeds the service limit, the cylinder Piston Ring Installed Gap 1. Position ring 1/2I (1.3 cm.) from the top of the NOTE: A difference in end gap indicates cylinder taper. NOTE: Always check piston ring installed gap after re- 90 q to pin FUJI ENGINES - Measure 1/2 s (12.7mm) up from bottom of skirt DOMESTIC ENGINES - Measure 3/8 s (10.0mm) up from bottom of skirt 1/2 s (1.3cm.) Cylinder Piston Ring Cylinder Piston Ring Feeler Gauge 1/2 s (1.3cm.) Straight Edge Piston Ring Cutaway Up Keystone Piston Ring |