Qlink RD400 User Manual page 121

a Spark plug gap
2. Clean the surface of the spark plug gasket
surface, and then wipe off any grime from the spark
plug threads.
3. Install the spark plug and tighten it to the specified
torque.
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 12.5 ft lbf)
USER'S MANUAL
NOTE:
If a torque wrench is not available when you are
installing a spark plug, a good estimate of the correct
torque is 1/4 to 1/2 turn past finger tight. Have the spark
plug tightened to the specified torque as soon as possible.
4. Install the spark plug cap.
and its mating
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