CFMoto motorcycle CF650NK. Service Manual - part 5

WARNING

Coolant

Coolant absorbs excessive heat from the engine and transfers it to the air at the radiator. If the co-

olant level becomes low, the engine overheats and may suffer server damage, Check the coolant

 level each day before riding the motorcycle, and in accordance with the periodic maintenance chart

 and

 

replenish

 

coolant

 

if

 

the

 

level

 

is

 

low

. 

Change

 

the

 

coolant

 

in

 

accordance

 

with

 

the

 

periodic

 

Maintenance

 

Chart

.

Information for Coolant

To protect the cooling system(consisting of the aluminum engine and radiator)from rust and corro-

sion, the use of corrosion

 

and

 

rust

 

inhibitor

 

chemicals

 

in

 

the

 

coolant

 

is

 

essential

 .

if

 

coolant

 

containing corrosion and rust inhibitor chemicals is not used

.

Over a period of time

,

the cooling 

system accumulates rust and scales in the water jacket and radiator

.

This will clog up the coolant 

passages, and considerably reduce the efficiency of the cooling system.

Use coolant containing corrosion inhibitors made specifically for

 engines and radiators in accordance with the instructions of rule. 

Chemicals are harmful to the human body. 

-59-

WARNING

Distilled water must be used with the antifreeze

 (

if

 

the

 

coolant

 

comes

 

to

 

low

).

If hard water is used in the system, it causes scales accumulation in the water hose, and

 considerably reduces the efficiency of the cooling system.

If the lowest temperature encountered falls below the freezing point of water, use

 permanent antifreeze in the coolant in protect the cooling system against and radiator
 freeze-up, as well as from rust and corrosion. 

WARNING

Permanent types of antifreeze on the market have anti-corrosion and anti-rust prope-
rties. When it is diluted excessively, it loses its anti-corrosion property. Dilute a perm-
anent type of antifreeze in accordance with the instructions of the manufacturer.

WARNING

When fill the coolant in the cooling system, it's colored agree and contains ethylene
 glycol. It is mixed at 50% and has the freezing point of -35℃.

-60-

Coolant Level Inspection

Situate the bike so that it is perpendicular to the ground.

Check the coolant level if it is between the F (Full) and L (Low) level lines.

WARNING

Check the level when the engine is cold (room of atmospheric temperature).

A

B

C

F (FULL) level line      L (Low) level line     Right side cover

If the amount of coolant is insufficient, remove the right side cover and add coolant into the

 reservoir

 

tank

.

-61-

Coolant Filling

Remove the right side cover.

Disconnect the connector of turn light.

Remove the cap from the reserve tank and

 

add coolant through the filler opening to between F 

and

 

L

B

A

Reservoir tank cap         Right side cover

Install reserve tank cap.

Connect the connector of turn light.

Install right side cover

.

WARNING

In an emergency you can add water alone to coolant reserve tank, however it must

 be returned to the correct mixture ratio by the addition of antifreeze concentrate as
 soon as possible

-62-

WARNING

If coolant must be added often, or the reserve tank completely runs dry, there is

 probably leakage in the system. Have the cooling system inspected by your 

authorized dealer.

Coolant Change

Have the coolant changed by an authorized dealer.

Spark Plug

The standard spark plug is shown in the table.

The spark plugs should be replace in accordance with the Periodic

 Maintenance Chart.

Spark plug removal should be done by an authorized dealer.

Spark Plug type

：

CR8EI

Plug Gap：0.7～0.9mm

Tightening Torque

：

15N.m

A

Plug Gap

-63-

Air System

Fuel & Exhaust Detecting System

Fuel & Exhaust System is detected by

 

Oxygen

 

Sensor

.

there is a

 

Oxygen

 

Sensor installed on

 

exhaust

 

pipe

.

It detects Air & Fuel combustion condition by measuring oxygen density and trans-

ferring

 

it

 

to

 

electrical

 

signal

 

to

 

ECU

.

When ECU judges combustion not completely, ECU will give

 signals to TPS and Intake air temp. sensor to adjust fuel injection. By this way, the ratio of air agai-

nst fuel can be optimized and make combustion completely. 

A

Oxygen Sensor

-64-

Air Suction Valves

The air suction valve is essentially a check valve which allows fresh air to flow only from the air cle-

aner into the exhaust port. Any air that has passed the air suction valve is prevented from returning.

 Inspect the air suction valves in accordance with the Periodic Maintenance Chart. Also ,inspect the

 air suction valves whenever stable idling cannot be obtained ,engine power is greatly reduced ,or

 there are abnormal engine noises. 

Air suction valve removal and inspection should be done by an authorized dealer

.

Valve Clearance

Valve and valve seat are wearing during using, upsetting valve timing.

-65-

CAUTION

If valve and valve seat is left unadjusted, wear will eventually cause the valves

 to remain partly open or without clearance, which lower performance or making
 noise and may cause serious engine damage. Valve clearance for each valve
 should be checked and adjusted in accordance with the Periodic Maintenance 

Chart. Inspection and adjustment should be done by an authorized dealer.

Air Filter

A clogged air filter restricts the engine

'

s air intake, increasing fuel consumption, reducing engine 

power, and causing spark plug fouling.

The air filter element must be cleaned in accordance with the periodic Maintenance Chart. In dusty ,

rainy, or muddy condition, the air filter element should be serviced more frequently than the recom-

mended interval by an authorized dealer.

Oil Draining

Oil Draining hose located on the rear right side and at the

 

top of shock where is to see if any oil or

 

water has run down from the air filter housing

.

If there are any oil in the reservoir, remove oil draining hose to drain the oil.

-66-

B

A

Drain Hose

     

Plug

WARNING

Be sure to install the drain hose after draining. Oil on 
tires will make them slippery and can cause an accident
 and injury.

Throttle Control System

Check the throttle grip play in accordance with the periodic Maintenance Chart ,and adjust it if nec-
essary.

Throttle Grip

The throttle drip controls the butterfly valves in the throttle body ,if the throttle grip ahs excessive

 play due to either cable stretch or maladjustment, it will cause a delay in throttle response, espec-

ially at low engine speed. Also, the throttle valve may not open fully at full throttle. On the other hand,

 if the throttle grip has not play ,the throttle will be hard to control, and the idle speed will be erratic.

Inspection

●Check that the throttle grip play is neatly.

●Adjust throttle grip if there is improper play.

-67-

B

A

Throttle Grip 

             

Throttle Grip Play

Throttle Grip Play：2~3mm

B

C

A

Locknut       Adjuster      Throttle Cable 

Adjustment 

Loosen the locknut at the upper end of the throttle

 cable and turn the throttle cable adjusting nut in 

completely so as  the give the throttle grip plenty

 of play. 

-68-

Turn out the decelerator cable adjust nut t until there is no play when the throttle grip is completely

 closed. 

   Tighten the locknut.

Turn out the accelerator cable adjusting nut until a play of ~3mm

 

is

 

obtained

 

at

 

the

 

throttle grip.

Tighten the locknut.

F

  

D

E

CAUTION

Locknut         Adjuster         Decelerator Cable

Operation with improperly adjusted, 
incorrectly routed, or damaged cables 
could result in an unsafe riding condition.

Idle Speed

The idle speed of your vehicle has been done before out of factory, there is no need to do any adju-

stment by yourself , otherwise will effect vehicle

'

s performance. If there is any parts which will effect 

idle speed need to be replaced ,

 

contact

 

with

 

authorized

 

local dealer

 

and

 

use

 

PDA

 

to

 

diagnose

 

and

 

have

 

calibration

.

-69-

CAUTION

Operation with an improperly adjusted could result in an unsafe riding condition.

Idle Speed：1300±130rpm

Clutch

Due to friction plate wear and clutch cable stretch over a long period of use, the clutch operation

 should be checked each day before riding the motorcycle, and in accordance with the Maintenance 

Chart.

CAUTION

To avoid a serious burn, never touch a hot engine or exhaust pipe during adjustment .

Inspection

Check that the clutch lever operates properly and that the inner cable slider smoothly .if there is

 any irregularity

,

have the clutch cable checked by an authorized dealer

.

Check the clutch lever play.

Clutch Lever play：2~3mm

If the play is incorrect, adjust the lever 

play as following

Adjustment

-70-

B

C

D

A

Clutch handle    
 Locknut       

Adjuster 

Clutch Lever Play 

Loosen the locknut, and turn the 

adjuster so that the clutch lever will 

have the proper play

WARNING

Be sure the upper end of the clutch outer 
cable is fully seated in its fitting, or it could 
slip into place later, creating enough cable

 play to prevent clutch disengagement, 

resulting in a hazardous riding condition.

If it cannot be done when upper end of the clutch cable at the limitation ,adjust the nuts at the lower 

end of the clutch cable. 

B

C

A

Adjuster           Locknut       Clutch cable

NOTE

After the adjustment is made ,start the engine

 and check that the clutch does not slip and that
 it releases properly.

-71-

Drive Chain

The drive chain slack and lubrication must be checked each day before riding, motorcycle and in

 accordance with the Periodic Maintenance Chart for safety and to prevent excessive wear. If the 

chain becomes badly worn or maladjusted-wither too loose or too tight- the chain could jump off or

 break.  

WARNING

A chain that breaks or jumps off the sprockets could snag on the engine sprocket or lock

 the rear wheel, severely damaging the motorcycle and causing it to go out of control

Chain Slack Inspection

Set the motorcycle up on its side stand

Rotate the rear wheel to find the position where the

 

chain

 

is tightest

,

and measure the maximum

 

chain slack by bulling up and pushing down the chain midway between the engine sprocket and

 

rear wheel sprocket

.

If the drive chain is too tight or too loose ,adjust it so that the chain slack will be within the standard

 value 

Standard Value：30~40mm

-72-

A

Chain Slack

Adjustment

●Loosen the left and right chain adjuster locknuts.

●Remove the cotter pin, and loosen the rear axle

 

nut

.

●If the chain is to loose ,turn the left and right chain   

Adjust

 

nuts clockwise

 

and evenly.

●If the chain is too

 

tight

,

turn the left and right chain

 

Adjust nuts anticlockwise, and evenly.

●Turn both chain adjusting nuts evenly until to drive 

Chain has the correct amount of slack.

●Keep rear wheel shaft move same on left and right fork.

B

C

D

A

Cotter pin               Axle locknut 
Adjuster                 Chain locknut 

-73-

WARNING

Rear wheel shaft should be installed at same level on left and right rear fork.

Misalignment of the wheel will result in abnormal wear, and may result in unsafe riding
 condition 

WARNING

Tighten both chain adjuster locknuts.

Tighten the rear axle nut to the specified torque

 

Tightening Torque

：

108N.m

NOTE

If there is no torque wrench, contact with a authorized local dealer.

Rotate the wheel, measure the chain slack again at the tightest position and readjust if necessary.

Install a new cotter pin through the rear axle nut and axle and spread its ends.

-74-