Master MAS-X18 User Manual page 30

STEP 2
a. Insert the Seat Support Tube (8) to the rear opening tube of the Main Frame (1).
b. Adjust the Seat Support Tube (8) to your desired height, then refit and tighten the Lock Knob (9).
c. Attach the Seat Horizontal Slider (10) onto the Seat Support Tube (8), secure with the Lock Knob (9).
d. Select your desired forward or backward position, then tighten the Lock Knob (9).
e. Fix the Saddle (11) to the Seat Horizontal Slider (10) with the provided 13-15 Wrench (24) until tight.
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