Zontes ZT350T-D, Maintenance Manual, Page: 38 / 152

38 / 152
Throttle valve body
Caution:
●The three-in-one sensor and stepper motor cannot be
immersed in any liquid.
●It is forbidden to adjust the idle speed adjustment screw on
the valve body.
1. Do not dismantle the throttle body to clean up
carbon deposits
a. In the process of riding, without affecting safety and
complying with traffic laws, appropriately increase the
throttle to increase the speed to more than 7000 and
continue riding for no less than 2 minutes. High-speed
scavenging can effectively remove carbon deposits.
b. Use a regular and qualified fuel cleaner to add in the
amount indicated. Frequent use may cause damage to the oil
supply line.
2. Remove the stepper motor and clean up carbon
deposits
a. After opening the seat cushion, use 10# ratchet
wrench to remove 3 nuts
⑴
. Remove the seat cushion and
put it away. Be careful not to put it directly on the ground
and avoid scratching the cushion skin.
b. Straighten out the cables in the battery compartment.
Buckle the 2 decorative bolt buckles (3) first. Remove the 4
M6×16 bolts (2) of the rear compartment with 4# Allen. Press
the center cylindrical pin of the 2 expansion nails with 4#
Allen and remove the expansion nails.
c. Grasp the tail skirt of the storage box and pull it upward
obliquely, paying attention to the cables in the battery
compartment. Pull up to see the left side of the glove box
atmosphere lamp thread, unplug the thread and remove the
glove box assembly.
d. Unplug the plug of the stepping motor① and the
sensor②
e. Use a short Phillips screwdriver to remove the 2 bolts③
and the anti-off card④ that come with the throttle valve
body assembly, and then remove the stepping motor
⑷
.
f. Use throttle cleaner to clean the carbon deposits on the
head of the stepper motor. Spray a small amount of cleaning
agent into the valve body hole. It is forbidden to soak the
stepper motor with any liquid.
g. Install the stepper motor back to the valve body, paying
attention not to miss the sealing ring. Plug the plug back in.
3. Remove the throttle valve body assembly to
clean up carbon deposits
a. Unplug the plugs of the stepping motor① and the
sensor②.