Valve Guide / Valve Inspection - Segway SNARLER ATV 2021 Series Service Manual

B B
◆ Measure the free length of each valve spring with a
Vernier caliper and compare to specifi cation.
◆ Valve Spring Free Length: Standard: 1.726" (43.85
mm)Service Limit: 1.683" (42.75 mm)
Standard
42.5 mm (1.6732")

Valve Guide / Valve Inspection

Valve Guide / Valve Inspection
◆ Valve-to-Guide Clearance Measurement:
If a small bore gauge is not available, inspect the valve
guide wear by measuring the valve to valve guide
clearance with the wobble method as indicated below.
◆ Insert a new valve 【A】 into the guide【B】and
set a dial gauge against the stem perpendicular to
it as close as possible to the cylinder head mating
surface.
◆ Move【C】the stem back and forth to measure
D D
valve/valve guide clearance.
◆ Repeat the measurement in a direction at a right
angle to the fi rst.
E E
If the reading exceeds the service limit, replace the
Cylinder head & Camshaft Carrier Combination.
NOTE NOTE
The reading is not actual valve/valve guide clearance
because the measuring point is above the guide.
Valve/Valve Guide Clearance (Wobble Method)
Exhaust:
Inlet:
◆ Check valve face for runout, pitting, and burnt spots.
To check for bent valve stems, mount valve in a drill
or use "V" blocks and a dial indicator.
◆ Check the end of the valve stem for fl aring, pitting,
wear or damage.
◆ Inspect split keeper groove for wear or fl aring in the
keeper seat area.
3-5-23
ENGINE TOP END ENGINE TOP END
Service Limit
41.4mm (1.6299")
Standard
0.09 ~ 0.17 mm
(0.0035" ~ 0.0067")
0.03 ~ 0.11 mm
(0.0012" ~ 0.0043")
Service Limit
0.34 mm
0.0133"
0.28 mm
0.0110"