2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 37Get this manual
Specifications (400)
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
CYLINDER, PISTON, AND RINGS
Piston SkirtCylinder Clearance Piston Diameter 15 mm (0.6 in from Skirt End Piston Ring Free End Gap (min) Bore Stroke Cylinder Trueness Piston Ring End GapInstalled Piston Ring to Groove Clearance (max) Piston Ring Groove Width 0.060-0.073 mm (0.0024-0.0029 in 81.930-81.945 mm (3.2256-3.2262 in
(1st) 8.9 mm (0.3504 in (2nd) 8.3 mm (0.3268 in
Valve GuideStem Clearance
(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
82.0 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 (1st2nd) 1.01-1.03 mm (0.0398-0.0406 in (oil) 2.01-2.03 mm (0.0791-0.0799 in (1st2nd) 0.97-0.99 mm (0.0381-0.0389 in (max) 20.03 mm (0.789 in (min) 19.98 mm (0.787 in (max) 20.04 mm (0.7889 in 0.10-0.55 mm (0.004-0.022 in 21.95-22.00 mm (0.8642-0.8661 in