Rocker Arm Check; Rocker Arm Shaft Check; Valve Spring Free Length Check - Eton VECTOR ST 250 Service Manual

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
41