2007 Arctic Cat ATVs 400/500/650/700 Service Manual, Page 41Get this manual
Specifications (400Manual Transmission)
VALVES AND GUIDES
Valve Face Diameter ValveTappet Clearance (cold engine) (intake) 30.6 mm (1.20 in (exhaust) 27.0 mm (1.06 in (intake) 0.05-0.10 mm (0.002-0.004 in (exhaust) 0.22-0.27 mm (0.009-0.011 in (intake) 0.010-0.037 mm (0.0004-0.0015 in (exhaust) 0.030-0.057 mm (0.0012-0.0022 in (max) 0.35 mm (0.014 in
CYLINDER, PISTON, AND RINGS
Piston SkirtCylinder Clearance Cylinder Bore Piston Diameter 15 mm (0.6 in from Skirt End Piston Ring Free End Gap (min) 0.060-0.073 mm (0.0024-0.0029 in 82.000-82.015 mm (3.2283-3.2289 in 81.930-81.945 mm (3.2256-3.2262 in
Valve GuideStem Clearance
(1st Ring) 8.9 mm (0.3504 in (2nd Ring) 8.3 mm (0.3268 in 82 71.2 mm (3.29 2.80 in (max) 0.05 mm (0.002 in 0.33-0.61 mm (0.013-0.024 in (1st) 0.180 mm (0.0071 in (2nd) 0.150 mm (0.0059 in (1st) 1.01-1.03 mm (0.0398-0.0406 in (2nd) 1.01-1.03 mm (0.0398-0.0406 in (oil) 2.01-2.03 mm (0.0791-0.0799 in (1st) 0.97-0.99 mm (0.0381-0.0389 in (2nd) 0.97-0.99 mm (0.0381-0.0389 in (max) 20.03 mm (0.789 in (min) 19.98 mm (0.787 in