DAELIM ET-250 Service Manual page 47

Rocker Arm
Measure the cam rocker arm I.D., and wear or
damage, oil hole clogged?
Service Limit: Replace when it is less than 12.10
mm.
Rocker Arm Shaft
Measure the active O.D. of the cam rocker arm shaft
and cam rocker arm.
Service Limit: Replace when it is less than 11.91
mm.
Calculate the clearance between the rocker arm shaft
and the rocker arm.
Service Limit: Replace when it is less than 0.10
mm.
Valve spring free length
Measure the free length of intake and exhaust valve
springs.
Service limit:
Inner spring 35.00 mm
Outer spring 39.00 mm
Valve stem
Check if valve stems are bend, crack or burn.
Check the operation condition of valve stem in
valve guide, and measure & record the valve stem
outer diameter.
Service Limit: IN: 4.90 mm
EX: 4.90 mm