2008 Arctic Cat 366 ATV Service Manual, Page 30Get this manual
Specifications 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) 0.076-0.127 mm (0.003-0.005 in (exhaust) 0.152-0.203 mm (0.006-0.008 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 80.98-81.00 mm (3.188-3.189 in
(1st) 8.0 mm (0.3150 in (2nd) 8.3 mm (0.3268 in
Valve GuideStem Clearance (max)
(intake) 0.04 mm (0.0016 in (exhaust) 0.06 mm (0.0024 in
(max) 0.35 mm (0.014 in
81.0 71.2 mm (3.19 2.80 in (max) 0.01 mm (0.0004 in 0.15-0.30 mm (0.006-0.012 in
Valve GuideValve Stem Deflection (wobble method) Valve Guide Inside Diameter Valve Stem Outside Diameter