Skyteam SKYMAX ST126-6 Instruction manual

ST125-6 E4 approved
:
WORKSHOP MANUAL

m n
PREFACE
ST125-6
This workshop man al is to s pply the reference and help for
the correct maintenance and repair of SKYTEAM SKYMAX
ST125-6 MODEL.
ST125-6 hkmmni
SKYTEAM SKYMAX ST125-6 MODEL can s it the general needs
of the motorcycle sers, so the mechanics sho ld read and
st dy this man al caref lly before processing the maintenance
or repair.
If the information on this workshop man al is different from
the ser's man al, please take this workshop man al as
standard.

^Ti^l CONTENT GUIDE
2
PART 2 REGULAR MAINTENANCE AND CHECK
3
PARTS ENGINE REPAIR
mmut:
4
PART 4 ELECTRICAL SYSTEM
PART 5 EFI SYSTEM
5
sa * ; MMœièmm 6
* : J J
PART 6 FUEL SUPPLY SYSTEM

1
PART 1 GENERAL INFORMATION
VEHICLE APPEARANCE
1-1
VIN NUMBER POSITION
1-2
RECOMMENDED FUEL AND MACHINE OILTYPE...1 -3
PARAMETER
1-4

GENERAL INFORMATION
1-1
ST125-6^hH APPEARANCE
Rear Carrier
Speedometer
Headlamp -Tail
Lamp
■Rear Wheel
Front Wheel
Engine
Handlebar
iew Mirror
M ffler Comp
Shock
Absorber, Front
Rear Shock Absorber-
Brake Rod

W l GENERAL INFORMATION
1-2
■ \ .
ST125-6
\r
VIN NUMBER POSITION
On the rieht side of the vehicle
VIN:
vin
>
[
VIN n mber is engraved on the right
side of the steering pipe
On the left side of the vehicle
>
T^o
Engine n mber is engraved nder the
left crankcase

H 3^ GENERAL INFORMATION
1-3
RECOMMENDED FUEL AND MACHINE OIL TYPE
Please pay attention to sing the appointed f el, machine oil and hydra lic fl id
M FUEL:
S ggest sing 90# or above lead-free f el, so the life time of spark pl g and
engine can be exten e , an the pollution cause by emission can be
red ced.
ENGINE OIL:
mmm&mmmm: M^i5W4o
^ 10W40
Suggest using the engine oil with goo quality:
SUMMER 15W40
WINTER 10W40
With recommended engine oil, the wear can be red ced and the life time of
engine can be exten e
BUMMîÆ FRONT SHOCK FLUID:
SS8 «£ 46 # m&'tâ o
S ggest sing SS8 or 46# hydra lic fl id
îfiljÿÈ BRAKE FLUID:
Mobil J# DOTS Si DOT4 ËlîM^jïïlii
S ggest sing DOT 3 or DOT 4 brake fl id (better with Mobil braned)

SE GENERAL INFORMATION
1-4
ST125-6^#it PARAMETER
SIZE AND WEIGHT:
±S#SSC MAIN PARAMETER:
LENGTH
1630mm
ECONOMIC FUEL CONSUMPTION
WIDTH
660mm
2.1 L/l 00 km
HEIGHT
965mm
MAX.POWER
WHEELBASE
1060mm
6.2KW/7500rpm
MINIMUM GROUND CLEARANCE 130mm
MAXIMUM TORQUE
9.2N.m /
DRY WEIGHT
84kg
4500r/min
234kg
MAX.LOADING
IDING SPEED
1400r/min
ENGINE:
MODEL 1P52FM
Sït TYPE
Air-Cooled, 4 stroke, single cylinder
124cm 3
W
DISPLACEMENT
fcLfèMï BORE*STROKE
52.4x57mm
BUfâtt COMPRESSION RATIO
9.5:1
%/f$P/nAÙ Electric & Kick
STARTER SYSTEM
Oil filled foam
AIR FILTER TYPE
LUBRICATION SYSTEM Press re and splash l brication

$E & GENERAL INFORMATION
1-5
ELECTRICAL SYSTEM:
TRANSMISSION SYSTEM:
IGNITION SYSTEM
ECU
MAGNETOR 12VQZ-C8
CLUTCH TYPE Wet, m ltiple dise
BATTERY
12V-4AH
GEARS
4 4 speed man al J
KVcU SPARKPLUG
NGK/CR6HSA
'ffAÜtk TRANSMISSION RATIO
lüM'j:! FRONT LAMP
TURNING LIGHT
®T/J$PI'J:T TAIL LAMP/LISENCE PLATE LIGHT
12V35W/35W
Air-Cooled, 4 stroke, single cylinder
12v LED
1 st gear 2.833
12V21W/5W
ItlfÈfi'j:! FRONT POSITION LIGHT 12V LED
SPEEDOMETER LIGHT
fuel indicator light 12V led
2 nd gear
1.706
jnfê 3 rd gear
1.238
12V LED
4 th gear
mm 0.958
front sprocket
Z15
ii]nA HORN
12V 1.5A 95±5dB(A)
FUSE
yÉIÈit FUEL LEVEL GAUGE mm
rear sprocket
10A
Z32
MAGNETIC INDUCTION
RUNNING SYSTEM:
CAPACITY:
fèlp TIRE fjMn FRONTTIRE 3.5-10 51J
FUAL TANK CAPACITY 5.5L±0.5L
REAR TIRE 3.5-10 51J
OIL TANK CAPACITY 1000ml
Ipffi TIRE PRESSURE ip-A SINGLE:
FRONT SHOCK FULID CAPACITY
itM FRONT TIRE 220kpa
75ml
REAR TIRE 220kpa
MA. DOUBLE : iiffÈ FRONTTIRE 230kpa
REAR TIRE 240kpa
Mm SUSPENSION # if SPRING&HYDRAULIC
fljsj] BRAKE
fj: /5: F&R DISC

2
PART 2 REGULAR MAINTENANCE AND CHECK
BREAKING-IN PERIOD AND
MAINTENANCE PERIOD.. .2-1
maintenance and
ADJUSTING
PROCESS.. .2-2
ENGINE MACHINE OIL
2-2
AIL FILTER
2-3
CLUTCH
2-4
SPARK PLUG
2-5
DRIVE CHAIN
2-6
mà TIRE
2-7
STEERING SYSTEM
2-8
FASTNERS
2-8

REGULAR MAINTENANCE AND ADJUSTING PROCESS
2-1
REAKING-IN PERIOD AND MAINTANENCE PERIOD
ll'nlfj REAKING-IN PERIOD:
• ST125-6 1000km; 1000km for 125-6
• 300km & 1000km
Need to change the machine oil at 300km and 1000km within the breaking-in period
;
The max. speed cannot be over 60km/h d ring the breaking-in period, f ll throttle is not allowed.
MAINTENANCE INTERVALS:
. $ 1000km ^ 6
The vehicle sho ld be maintained every 1000km or 6 months, take the earlier one as the standard
ÆSBÆIrMfflïï REGULAR MAINTANENCE PERIOD CHART
SC # PARTS
1000km
3000km 5000km
lOOOOkn
Ml W PERIOD
f/UÉ ENGINE OIL CHANGE
— tÇ-Wk 2 TIMES EVERY YEAR
Sill AIR FILTER
CLEAN
M'iii FUEL FILTER
--Mm CHANGE
CLUTCH
ADJUST
‘ kVcU SPARKPLUG
Min CHECK, CLEAN
fèit CHECK
CHECK
Mm CHANGE
FUEL HOSE
2 ¥Mm-ft CHANGE EVERY 2 YEARS
TRANSMISSION CHAIN
iüS ADJUST
ffl LUBRICATE
îèün' TIRE
fèg CHECK
3¥Mm-& CHANGE EVERY 3 YEARS
I^f/lf^I STEERING SYSTEM
IÈS. SS CHECK, ADJUST
VEHICLE FASTNERS
iMfê CHECK, ADJUST
fig CHECK
BRAKE FLUID
2 CHANGE EVERY 2 YEARS
f5$l]Z>]$$ REAR BRAKE
fèg. iflg CHECK, ADJUST

REGULAR MAINTENANCE AND ADJUSTING PROCESS
2 — 2
ENGINE OIL
MAINTENANCE AND ADJUSTING PROCESS
300, 1000km 1000km
Change at 300km and 1000km riding d ring breaking-in period, afterwards change every 1000km, at least 2 times
per year
S-feBTfgJtriiJg,
>4
After long driving, the engine oil may go deteriorate and res lt in the
q icker wear of the engine, please change the machine oil as the following
steps,
Start the engine, warm p till 80°C,so it is easy to drain the oil; stop the
engine, kick on the central stand.
© ff?F£MM±lftÜltàR;
release the oil dipstick on the right crankcase ;
® ffl Mi?
disassemble the drain screw nder the engine with M17 wrench
• 10min
drain the oil ntil lOmins, so the oil can be drained completely
tight the drain screw
ENGINE OIL CAPACITY
DURING MAINTENANCE
850 ml
1000ml
ENGINE OIL CAPACITY IN TOTAL
28 N.m
SCREW© TORQUE
• tAyÉ^CI'/Èmltê OIL ADDING AMOUNT INSPECTION:
When check the oil, t rn off the motorcycle for 5 mins and keep the vehicle in a
pright position on level gro nd; remove the oil dipstick and wipe it clean. Check
the oil level by inserting the oil filler cap/dipstick into the oil filler hole witho t
screwing it in.
(2)
Oil level sho ld be in the middle of the tick marks on the oil dipstick.

REGULAR MAINTENANCE AND ADJUSTING PROCESS
2-3
air filter
§ 3000km
Check and clean every 3000km
If the air filter is st ck by the d st, then the resistance of air inlet will be increased, which
will res lt in low o tp t power, increased f el cons mption and air poll tion.
im-FWj&fa&xm'mm*
Please check and clean the parts as follows,
Loosen the screw of the air filter clip, remove the air filter
• fôJFSMiiï,
Loosen the screw, and remove the air filter cover
(D a .
Fill the incomb stible detergent A in the washing plate
Immerse
the foam filter core in the detergent and wash
Press the foam filter core by the two palms instead of twisting, otherwise, the filter core
will be damaged
(3) + o Immerse the filter core in the engine oil
(D EEtjmCTMM.
Press the engine oil from the filter core, and keep the core slightly wet with oily
WARNING:
After washing, please check whether the filter core is broken or cracked, if so, please
change the filter core.
Fix the filter core correctly, so the air can go thro gh the filter core, and the d st will
not
enter the cylinder to q icken the wear of the piston and cylinder.
Throttle Cable adj stment
ÿénm&w i~2mm w g èm , T^îéüiïïÉn^^Mri]i®.
l-2mm free play sho ld be kept for throttle cable, please adj st the cable free
play as follows:
• fèlêÉI'àMl::
Check the free play by rotating the throttle grip slightly
Loosen the locking n t©, and t rn the adj sting n t © inwards or o twards ntil
get a s itable free play
• mmmm, @ æ ««©=
Keep the position of the adj ster, and fix the locking n t ©

REGULAR MAINTENANCE AND ADJUSTING PROCESS
2 — 4
ï^-ê-3£ CLUTCH
^ 5000km
CHECK EVERY 5000KM AND ADJUST
• remove the cl tch cover;
• 3mm £
T j ;
Loosen the cl tch adj ster lock n t on the cl tch cable(î), t rn the adj sting n t(?)
ntil the adj ster screw at aro nd 3mm
V4~V2ffl;
Loosen the cl tch lock n t®, t rn the adj sting bolt ® ntil resistance is felt by
flat-blade screw driver, then loosen l/4~J/2 t rn
• tighten the locking n t®
Fix the free play of the cl tch lever to 3mm by the adj ster on the cl tch cable
Tighten the adj ster lock n t on the cl tch cable
^1: WARNING:
If there is no free play of the cl tch, then the cl tch may
separate slightly, which will res lt in the q icker wear of the
cl tch, even b rning the cl tch plate, and conseq ently
decrease the power and increase the f el cons mption

REGULAR MAINTENANCE AND ADJUSTING PROCESS
2-5
SPARKPLUG
M 10000km
Check, adj st and change every 10000km
tern. mmpikttm&m,
If ignore the spark pl g, the vehicle will be diffic lt to get started and perform badly.
After sing the spark pl g for some while, the electrodes will be b rned grad ally
and th s prod ce the carbon inside. According to the reg lar check list, the spark
pl g sho ld be removed, inspected, washed and adj sted(clearance).
K'X
The carbon inside can stop the good spark, and res lt in bad ignition or b rning, so
please clean the carbon reg larly
Mo
If the electrodes in the middle are damaged badly, please change the spark pl g, and
se the depth r ler to adj st the clearance correctly
:
NGK CR6HSA
SPARK PLUG
'Xi mm
0.6~0.7mm
SPARK PLUG CLERANCE

REGULAR MAINTENANCE AND ADJUSTING PROCESS 2-6
DRIVE CHAIN
# 1000km CHECK EVERY 1000KM AND ADJUST
CHAIN SLACK
After long sing, the chain may extend; excessive chain slack may to ch other parts
and ca se strange noise, or res lt in the chain dropping.
Inspect and adj st the chain as the following steps
• jtîë'T'J# kick on the central stand:
T rn the rear wheel slightly, and make s re the chain stops at the biggest slack
point; check the slack
Loose the rear axle n t(T)and adj ster lock n ts@
• «MMÆ 10~15mm îÊiart.
2T |11 :
T rn both adj sting n ts® an eq al n mber of t rn ntil the correct drive chain
slack 10-15mm is obtained; make s re the index marks on both adj sters are
aligned with the index lines on the swing arm®
Tighten rear axle A t®, adj ster locking n ts® and @ accordingly
CHAIN SLACK
10~15mm
54— 66N.m
TORQUE OF REAR AXLE
NUT©
fê&?#î5fc. 'MW CHAIN CLEANING AND LUBRICATION
^ 5000km Inspect, clean or change every 5000km
after long sing, chain will be lack of l brication oil and make lots of
dirt on it, which will res lt in the r st, st ck, strange noise of the
chain,and q icken the wear;
IS] n.
Use diesel oil or kerosene to clean the chain; if there is r st on the
chain, the maintenance intervals sho ld be shortened.
Be s re the chain has dried completely after cleaning, and then se
machine oil or gear oil to f lly l bricate

REGULAR MAINTENANCE AND ADJUSTING PROCESS
2-7
WARNING:
As the photo shows, install the circlip so that its open end is opposite
the normal rotation of the chain.
chain dr dtp
0 0
0 0
check whether the chain sho ld be
changed according to the following steps:
moving chirwtwn
fix the chain on the flatform, and make s re the chain is aligned;
, mB-tRmm. mfà&jË,
Saji 259.0mm, o
Check the length of the 21 rolling balls(eq al to 20 links) by the vernier
caliper, if the length is over 259.0mm, then the chain sho ld be replaced
123
19 20 21
'« «I» cje ojc aye oJa ela aX° <> Tt 0 «X
m,
71
If the chain is with distorted or damaged rolling balls, or r sty badly, or
st ck by several links, over worn, then it sho ld be replaced.
lâ TIRES
'at 5000km Mr CHECK EVERY 5000KM
If se over worn tire, the driving stability will be red ce, and res lt in
dangero s driving
œ
If the tire press re is too high or too low, the steering system will be
infl enced badly, and the tire will be also worn more q ickly; Therefore,
we sho ld keep the correct tire press re to ens re the stability and
safety of the driving.
, fSMI&fèJjp Please change the tire if any of the
following sit ation happens:
the depth of the tire thread is below the
limit;
2.fèIpjPJjMW crack at the side of the tire,-
B.fèlp^'Ë. b mp on the tire;
3 ^ the inner t be has been repaired for 3 times;
S.fèljpflîfflÆiÜ' 3 ^ the tire has been sed for more than 3 years,,
BUffcjjn
FRONT TIRE
1.6 mm
ÆîfkHn
REAR TIRE
2.0 mm
fèln^Ëfê- TIRE SIZE
3.50-10
ÜZfc^fc^Ji MAX.
LOADING PRESSURE
250kpa

REGULAR MAINTENANCE AND ADJUSTING PROCESS
2 — 8
STEERING SYSTEM
^ 5000km 10000km jatTV^Vto
Check every 5000km, and l bricate every 10000km
To handle easily and drive safely, the steering system sho ld be adj sted
correctly.
Check req irement: the front fork is tightened correctly, and the steering
moves freely from side to side.
Check method: kick on the central stand, grab the lower part of the front
shock absorber, and then move front and rear, to check whether it's loose.
• ijfiETjvi Adj sting steps
Loosen the steering head n t(T) and the steering stem bolt(2)
Use professional wrench(3) to tight the steering stem self-lock n t(4)
Then tighten the n t(T) and steering stem bolt(2) in seq ence.
Tighten the bolt to the following torq e val e,
N t®
81 — 99 N.m
Steering stem bolt©
22.5 — 27.5 N.m
FASTENERS
5000km Check and tighten every 5000km
The following bolts and n ts are the fasteners for important parts; to ens re the driving
safety, they sho ld be tightened and properly sec red.
Sho ld se the torq e wrench and tight to the correct torq e val e.

REGULAR MAINTENANCE AND ADJUSTING PROCESS
2-9
^ S
DESCRIPTION
TORQUE
ITEM
N.m
front axle n t 54~66
©
rear axle n t 54-66
©
fèz&fcniifè bolt, engine
32.5-37.5
n t, rear swing arm
axle
45~55
bolt, front&rear
disc brake
©
22.5~27.5
©
bolt, brake disc 22.5-27.5
©
bolt, rear disc brake
22.5~27.5
n t, rear shock
absorber
©
45~55
bolt, rear sprocket 45~55
Æ'iRlttlIlti# steering n t 8l~99
o
t iiiilfê bolt, front shock
absorber
45~55
a
TSctMfê bolt, steering stem 22.5~27.5
o

3
PARTS ENGINE
ENGINE OPERATION PRINCIPLE 3-1
ENGINE DISMANTLING AND ASSEMBLY 3-2
frMRM ENGINE PARTS
3-6
CYLINDER HEAD 3-6
CYLINDER
3-14
ÆftSjfIMSP# LEFT CRANKCASE COVER
3-19
RIGHT CRANKCASE COVER 3-24
CRANKCASE
3-31