Honda TRX400EX FOURTRAX 1999, Service Manual

Page: 117 / 263

Check the top of the cylinder for with a
straight edge and feeler gauge across the studs and
bolt holes as shown.
SERVICE LIMIT 0.10 mm in)
RING
Inspect the piston rings for movement by rotating the
rings. The rings should be able t o move in their
grooves without catching.
Push the ring until the outer surface of the piston ring
is nearly flush with the piston and measure the ring-
to-ring groove clearance.
SERVICE LIMITS: Top: 0.14 mm (0.006 in)
Second: 0.12 (0.005 in)
Insert each piston ring into the bottom
of
the cylinder
squarely using the piston.
Measure the ring end gap.
SERVICE LIMITS Top: 0.50 mm
(0.020
Second: 0.65 mm
(0.026 in)
Oil (side rail):
0.9 mm
(0.04
Measure the piston pin O.D. 90" to the piston pin
hole and a t point 15 m m (0.6 in) from bottom of the
piston skirt.
SERVICE LIMIT 84.880 mm (3.3417 in)
Compare this measurement against the maximum
cylinder
measurement and calculate the
to-cylinder clearance (page 8-4).