Suzuki TU250X, Руководство по обслуживанию

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3-32 ENGINE
• Clean and assemble the head and valve components. Fill the
intake and exhaust ports with gasoline to check for leaks.
• If any leaks occur, inspect the valve seat and face for burrs or
other things that could prevent the valve from sealing.

VALVE STEM END CONDITION
Inspect the valve stem end face for pitting and wear. If pitting or
wear is present, resurface the valve stem end. Make sure that
the length
A
is not less than 2.1 mm (0.08 in). If this length
becomes less than 2.1 mm (0.08 in), replace the valve.

Valve stem end length
A
Service Limit (IN. & EX.): 2.1 mm (0.08 in)

09900-20101: Venier calipers (150 mm)
VALVE SPRING
Check the valve spring for proper strength by measuring its free
length and also the force required to compress it. If the spring
length is less than the service limit, or if the force required to
compress the spring does not fall within the specified range,
replace the spring.

Valve spring free length
Service Limit (IN. & EX.): 39.3 mm (1.55 in)

09900-20101: Venier calipers (150 mm)

Valve spring tension
Standard: 185 – 219 N
(18.9 – 22.3 kgf, 41.7 – 49.2 lbs)/
36.0 mm (1.42 in)
CAM CHAIN TENSIONER
Inspect the cam chain tensioner for damage. If any damage is
found, replace the cam chain tensioner with a new one.
Always use extreme caution when handling gasoline.