Vento Triton R4 User manual

VENTO MOTORCYCLES
Rev no.01/.Page 1 of 143
Triton R4
Service& Maintenance
Manual

VENTO MOTORCYCLES
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VENTO MOTORCYCLES
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 
This service manual has been specially
prepared to provide all the necessary
information for the proper maintenance and
servicing of VENTO Triton R4 cooter.
The Triton R4 has many features such as:
• V-belt drive automatic transmission
• Fan air-cooling system
• CDI Ignition system
• Auto Ignition system
• Alarm ystem
This manual contains an introductory
description on VENTO Triton R4 and
procedures for Inspection/ ervice and
overhaul of its main components. This
Manual is intended those who have enough
knowledge and skills for servicing of
VENTO vehicles. Without such knowledge
and skills you should not attempt servicing
by relying on this manual only. Instead,
please contact your nearly authorized
VENTO motorcycle dealer.
FORWARD
INDEX
PERIODIC MAINTENANCE PROCEDURE 2
ENGINE 3
FUEL AND LUBRICATION Y TEM 4
ELECTRICAL Y TEM 5
CHA I 6
ERVICING INFORMATION 7
GENERAL INFORMATION
1

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GENERAL INFORMATION
MODEL IDENTIFICATION…………………………………………….… 1-1
FUEL AND ENGINE OIL…………………………………………………. 1-1
BREAK-IN PROCEDURE ……………………………………………… 1-1
PRECAUTION AND GENERAL IN TRUCTION ……………………1-2
PECIFICATION …………………………………………………………1-3
CONTENT

1
11
1

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1-1 GENERAL INFORMATION
TYPE & IDENTIFICATION
FRAME NUMBER
FRAME NUMBER
○
1 is Engraving on the steel tube of frame as
shown in figure.
○
1
ENGINE NUMBER
ENGINE NUMBER ○
 is Engraving on rear side
crankcase as hown in figure.
Both FRAME NUBER AND ENGINE NUMBER are
designed especially for registration your scooter and
for spare parts order.
FUEL AND ENGINE OIL RECOMMENDATION
Be sure to use specified fuel and engine oil.
ome specifications are as follows:
FUEL
• Gasoline should be Unleaded, the octane number must be 90.
ENGINE OIL
For engine lubrication, you can use specified high quality two-stroke engine oil (without being
diluted).
GEAR OIL
Use high quality, all-purpose AE 85W/90 Gear oil for this scooter. Make sure that the Engine
oil/Gear oil what you are using should come under API classification.
BREAK-IN PROCEDURES
During manufacture only the best possible materials are used and all machined parts are finished to
a very high standard but it is still necessary to allow the moving parts to ‘‘BREK-IN’’ before
subjecting the engine to maximum stresses. The future performance and reliability of the engine
depends on the care and restraint during its early life.
General require ents are as follows
• Limit break-in speed
At the first 1000 ms (630 milesmileageuse throttle opening less than 1/2.
Up to 1600 Kms1000 milesmileageuse throttle opening less than 3/4.
• Upon reaching an odometer reading of 1600 Kms(1000 miles) you can subject the motorcycle to
full throttle operation.
• Do not maintain constant engine speed for on extended time period during any portion of the
‘‘BREAK-IN’’ period, try to vary the throttle position.

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1-2 GENERAL INFORMATION
PRECAUTIONS AND GENERAL INSTRUCTIONS
GENERAL PRECAUTIONS:
WARNING
o Proper service and repair procedures are important for the safety of the service mechanic and the
reliability of the vehicle.
o When two or more persons are working together, pay attention to the safety of each other.
o When it is necessary to run the engine indoors, make sure that the exhaust gas is forced outwards
and ventilation should be proper.
o When working with toxic or flammable materials, make sure that the area you work in is well ventilated
and that you follow all off the material manufacturer’s instructions.
o Don’t use gasoline as a cleaning agent.
o After servicing the motorcycle check all lines i.e. fuel, oil and brake lines for leaks.
o Whenever you remove Oil seals, Gaskets, packing, O-rings, Locking washers, Cotter pins, Circlips,
and certain other parts as specified, be sure to replace them with ones. Also before installing these
new parts be sure to remove any left out material from the mating surfaces.
o Never reuse a circlip, when installing a new circlip, take care not to expand the end gap larger than
required to slip the circlip the shaft. After installing a circlip, always ensure that it is completely seated
in its groove and securely fitted.
o Do not use self- locking nuts a few times over.
o If parts replacement is necessary, replace the parts with VENTO Genuine parts or their equivalent.
o When removing parts that are to be reused, keep them arranged in an orderly manner so that they
may be reinstall in proper order and orientation.
o Always use special tools when required.
o Always use specified lubricant, bond& sealant.
o While removing the battery, disconnect the Negative ter inal / Cable first then Positive ter inal /
Cable and when reconnecting the battery, connect the Positive ter inal / Cable first then Negative
ter inal / Cable.
o During ervice to electrical parts, if no need of battery power then please disconnects the Negative
ter inal / Cable of the battery.
o During tightening of Cylinder head and crank case bolts and nuts start with larger diameter and
ending with smaller diameter, from inside to outside diagonally, with the specified tightening torque
values.
o After reassembly, recheck parts for tightness and operation.
REPLACEMENT COMPONENTS
Be sure to use genuine VENTO spare parts or their equivalent. Genuine VENTO components are high
quality parts, which are designed specially for VENTO vehicles.
CAUTION
cooter/motorcycle may damage by using non genuine parts or parts that is not equivalent to VENTO
parts and will be affecting performance also.

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1-3 GENERAL INFORMATION
SPECIFICATIONS
DIMENSIONS
Over all length …….………
1830mm
Over all width ………………
695mm
Over all height……..………
1160 mm
Wheel base …………….
1295mm
Net weight…..………………
92kg
CHASSIS
Front shock absorber……Hydraulic
Rear shock absorber…… pring, oil damp
Turning angle…………….48º(toward the
left & right)
Front wheel…………120/70-12
Rear wheel…………130/70-12
Front brake…………Disc φ190 mm
Rear brake…………Drumφ110 mm
ENGINE
Type………….Two-stroke,fan cooling
Intake system…………Reed valve
No. of cylinder.…………1
Bore……………………40.0mm
troke………………….39.6mm
Displacement ……………. 49.8mL
Compression ratio………
6.9:1
Carburetor……………… ide draft
Air cleaner…………..Dry PU foam
tarting system………..Electric and kick start
Lubricating system…… Lubrication by oil
pump
ELECTRICAL
Ignition ystem--------- Electronic
CDI
Ignition Timing---------
150 at 5000 RPM
park Plug-------------- NGK/R/BR8H A
torage Battery----Yuasa/ YTX5L-B
Battery Capacity----------12V-4Ah
Magneto--------------------AC
Fuse------------------------ 8Amp
Headlight-------------------
12V 35 / 35 Watt
Turn Indicators (X4)-------
12V / 10 Watt
Tail light/stop light---------
12V / 5Watt
Meter light--------------- ---
12V / 1.7Watt
Oil level Indicator light---------
12V / 1.7 Watt
Turn signal Indicator light-----
12V / 3Watt
High beam Indicator light----
12V/3 Watt
Alarm light (LED)-------------
12V / 1.7Watt
CAPACITY
Fuel Tank---------------------------5.2L
Engine Lubricating Oil Tank---0.9L
Gear Oil----------------------------0.1L
TRANSMISSION
Clutch ystem------- Automatic, Centrifugal Type
Gears shifting mechanism ---------Automatic
Primary Reduction----------------- 1
Gear Reducti n rati
The first gear-------------------------4.0
The second gear---------------------2.933
Drive ystem ------------------------V-Belt drive
CVT Reduction ratio----------------0.8~2.2

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PERODIC MAINTENANCE AND SERVICE
Periodic maintenance and service schedule------------------------------- 2- 1
ervice and adjustment procedures--------------------------------------------2- 2
torage battery-----------------------------------------------------------------------2- 2
Cylinder head nut and exhaust pipe bolt---------------------------------------2- 3
Cylinder head and cylinder--------------------------------------------------------2- 3
park plug-----------------------------------------------------------------------------2- 4
Fuel level line-------------------------------------------------------------------------2- 4
Air cleaner-----------------------------------------------------------------------------2- 5
Throttle cable-------------------------------------------------------------------------2- 5
Engine idle speed--------------------------------------------------------------------2- 5
Oil pump-------------------------------------------------------------------------------2- 6
Gear oil---------------------------------------------------------------------------------2- 7
Braking---------------------------------------------------------------------------------2- 7
Tire -------------------------------------------------------------------------------------2-10
teering--------------------------------------------------------------------------------2-10
Front shock absorber---------------------------------------------------------------2-
11
Vehicle bolts and nuts--------------------------------------------------------------2-11
2
CONTENT
S

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2-1 PERIODIC MAINTENANCE SCHEDULE
The chart below lists the recommended intervals for all the required periodic service work necessary to keep the
motorcycle operating at peak performance and economy. Mileages are expressed in terms of Kilometer, Miles and
time for your convenience.
Note:
More frequent servicing may be performed on motorcycles that are used under bad road condition.
PERIODIC MAINTENANCE CHART
Miles 630 1890 3150 4410 6300
Kilometer
1000 3000 5000 7000 10000
Interval
Months. 2 12 24 36 48
torage battery I I I I I
Cylinder head nut
and exhaust pipe
bolt
T T T T T
Cylinder head and
cylinder — C C C C
park plug — C R C R
Air cleaner
Inspect & Clean every 3000 Kms (1890 miles)
Replace every 10000 Kms(6300 Miles)
Idle speed (rpm) I I I I I
Throttle cable play I I I I I
Oil pump I I I I I
Gear oil R R R R R
I I I I I
Fuel line Replace every 4 years
Brake I I I I I
I I I I I
Brake hose Replace every 4 years
I I I I I
Brake fluid Replace every 2 years
teering I I I I I
Front fork I I I I I
Rear shock absorber
I I I I I
Tire I I I I I
Vehicle body bolts
and nuts T T T T T
Note:
 I=inspectcleanadjustlubricateor replace if necessary
A=adjust C=clean R=replace T=tighten

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2-2 PERIODIC MAINTENANCE PROCEDURE
BATTERY INSPECTION AND CHECKING PROCEDURE
St rage Battery
Inspect at initially 1000Kms630 miles2 m nthsand every 6000 Kms3780 miles12 m nths
• Open the battery box cover from the foot rest.
•
Disconnect Negative ter inal / Cable first then
Positive ter inal / Cable of Battery
.
•
Measure the voltage between the +ve and –ve terminal of Battery charge the Battery if the
voltage is below the specified limit.
BATTERY TESTING PROCEDURE

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Remove the battery from the Motorcycle/ cooter. Connect the battery on load tester ensuring Red lead of
tester to (+ve) and Black lead to (-ve) terminal of battery. Check the terminal voltage of battery. It should be
12~14.5 Volts. Press the push button on the tester and watch the voltmeter reading on load. The battery
voltage should not drop down less than 9 volts; this indicates that the battery is perfect to take load of
self-starter motor. Check the specific gravity of each cell should not be less than 1.220.Put the battery on
charge, if required and carry out load test.
• Diagn se the nature f failure as under:
• BATTERY CELL DEAD TEST: On load if battery voltage is found less than 9.5Volt and one or more cell shows
specific gravity less than 1.220 then change the battery.
• OPEN CIRCUIT: During the charging of battery does not pickup the charge. In any of the above case, replace
the battery.
• RECOMDED BATTERY LOAD TESTER: MAKE—ELAK, MODEL: ---BCT7
• CAUTION: During Inspecti n, if the battery n the vehicle is f und defective, bef re replacing with a
new battery, it is imp rtant t check the battery charging circuit.
BATTERY CHARGING CIRCUIT TEST
The MAGNETO generated AC current, which is rectified into DC current by Voltage Regulator .It, is
automatically charging the battery depending upon condition of the battery, load and engine rpm.
Regulator is connected in parallel to the circuit. Hence this type of system is called “PARALLEL LOAD
REGULATOR”.
Connect DC Voltmeter and DC Ammeter, start the engine with fully charged good battery. The Voltage
Regulator output is as follows.
• Battery charging current range in between 0.6 Amp to 2Amp.
• The engine speed @ 5000 rpm with headlamp on condition.
• Battery terminal charging voltage > 11.5 V at any load condition (depending upon the
condition of battery)
NOTE 1
Incase charging output is less than 0.6 Amp or more than 2.0Amp then replace the Voltage Regulator with
new one and recheck.
NOTE 2
AMMETER: --- eries connection inline with positive battery wire to measure DC –Amp.
VOLTMETER: ---Parallel connection between positive & negative terminal of the battery to measure
DC-Volts.
IMPORTANT TIPS ON BATTERY
Trit n R4 battery charging circuit

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PECIFIC
GRAVITY
The pecific Gravity of fully charged battery should be 1.220~1.240
Use Hydrometer to check each cell of battery.
WARNING Remove negative terminal first, then positive terminal.
If the battery is corroded by sulfur. Please exchange it. If the terminal
of the battery has too much precipitate, please exchange it.
CHARGING Charging is necessary at less than 1.220 pecific Gravity for old
battery. It changes according to electrolyte temperature.
Connect positive terminal of charger to positive battery wire &
negative terminal of charger to negative battery wire.
CHARGING
CURREENT
For 2.5 Ah battery the charging current should be Maximum
0.25Amp.
For 6.0 Ah battery the charging current should be Maximum 0.6Amp.
CHARGING TIME
For new battery 8-12 hrs.
For old battery 12-14 hrs.
WARNING Always open all the caps of battery before charging.
Keep flames & sparks away from the battery.
Turn ON or OFF witch at charger & not at battery terminal
Don’t charge the battery, if electrolyte temperature is more than
45ºC.
Do not quick charge the battery.
IN TALLATION Connect positive terminal first, then negative terminal.
BATTERY
CAPACITY
2Volt- 4Ah /YB4L-B/YUASA
RECOMMENDED
BATTERY
CHARGER
Make: ELAK ModelC1/48
RECOMMENDED
HYDROMETER
Make: THIM ON Model: 108
NOTE • Always top up battery with the distilled water up to the maximum
level (Never use Acid to top up the old battery).
• Always ensure new battery is being charged in cold condition
after filling with the electrolyte.
• Always ensure that battery breather tube is not clogged, crimped
or bent. Breather tube should be properly routed.
• Incase if Motorcycle/ Scooter is not being used for longer
period, then first charge the battery fully & then connect
only positive ter inal to Motorcycle / Scooter.

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2-3 PERIODIC MAINTENANCE AND ADJUSTMENT PROCEDURE
Cylinder head nuts and exhaust pipe bolts
Tighten at Initially 1000 k  630 iles  or 2
othsand every 6000 k 3780 ilesor 12
onths
If cylinder head nuts are not tightened to the specified torque,
may result in leakage of compressed fuel-air mixture and reduce
output, tighten the cylinder head nuts in the following
procedures: 
1 Remove the frame lower covers.
2 Remove the cylinder head cover bolt.
3 Remove spark plug uppressor cap.
4 Tighten the nuts evenly one by one to the specified torque. Tighten
the nuts in the pecified order.
Tightening Torque
Cylinder head nut15-18N.m
Exhaust pipe b lt15-18N.m
Cylinder and cylinder head
Remove carbon every 6000 km3780 milesor 12
months
Carbon deposits in the combustion chamber and the
cylinder head will raise the compression ratio and may cause
preignition and overheating. Carbon deposition at the exhaust
port of the cylinder will prevent the flow of exhaust gases,
reducing the output. Remove carbon deposits periodically as
per specified schedule.
Carbon

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2-4 Periodic aintenance and adjust ent procedures
SPARK PLUG
Neglecting the spark plug maintenance eventually leads to difficult
starting and poor performance. If the spark plug is used for a long time,
the electrode gradually burns away and carbon builds up along the inside
part. In accordance with the periodic table, the plug should be removed
for inspection, cleaning and to reset the gap.
 Carbon deposits on the spark plug will prevent good sparking and
cause misfiring. Clean the carbon deposits
periodically.
 CARBON DEPOSIT
Check to see the carbon deposit on the park Plug. If
the carbon is deposited, remove it with a spark plug
cleaner machine or carefully using a tool with a
pointed end.
 Check to see the worn out or burnt condition of the
electrodes. If it is extremely worn or burnt, replace the
plug and also replace the plug if it has a broken insulator, damaged
thread etc.
Thickness gauge
park plug gap0.6~0.7 mm (0.024-0.028 inch)
Check the spark plug for burnt condition. If abnormal replace the
 Tighten the spark plug to the specified torque.
Spark plug
Tightening torque:15-18N.
NOTE:
 To check the spark plug, first ake sure that the fuel used is
unleaded gasoline.
 Confir the Specification, thread size and reach while replacing
the spark plug.

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2-5 PERIODIC MAINTENANCE AND ADJUSTMENT PROCEDUR E
AIR CLEANER :
Clean every 3000 Kms1890 milesReplace every
12000 Kms(1750 Miles)
If the air cleaner is clogged with dust, Air Intake resistance will
be increased with a result decrease in power output and will be
increase in fuel consumption. Check and clean the filter element in
the following manner.
 Remove clamp and mounting screw & take out air
cleaner
 Unscrew tapping screwremove air cleaner cover
 Fill a washing pan of a proper size with
Non-flammable cleaning solvent. Put the air
Cleaner element in the cleaning solvent and wash
properly.
 queeze the cleaning solvent out of the washed
element. By pressing it between the palms of both
hands: do not twist
or wring the air cleaner element or it will develop tears.
 Immerse cleaned filter element in CCI or CCI uper oil and
queeze the oil out of the element leaving it slightly wet
With oil. Fit the element to the Air cleaner case properly
 Install Air cleaner in the reverse order of removal.
CAUTION
 Before and during the cleaning operation, inspect the core for tears. A torn filter element must be replaced
with new one.
 Be sure to position the filter ele ent snugly and correctly
So that no inco ing air will bypass it. Re e ber, rapid wear
of piston rings and cylinder bore is often caused by a
defective or poorly fitted filter ele ent .
А- Non-fla able cleaning solvent(Kerosene)
B- CCI OR CCI Super oil or SAE 80 or 90 Gear oil.
THROTTLE CABLE
Adjust at initially 1000K s630 ilesor after 2 onths
And after every 6000 K s3780 ilesor after12 onths
thereafter

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Loosen locknut and adjust throttle cable play by turning adjuster in or out to obtain the
following cable play. After adjusting the cable Playtighten the locknut.
Cable play0.5-1.0MM0.02.-0.040 inch
ENGINE IDLE SPEED
Adjust at initially 1000K s630 ilesor after 2 onths and Every 6000 k s (3780 ilesor
after12 onths thereafter.
 Adjust the throttle cable play.
 warm up the engine at normal running condition
NOTE:
A warm engine means an engine that has been
run f r 10 minutes.
○
1
 Connect a Digital Tachometer to the connecting portion of the magneto lead wire as shown
In the illustration. Use the selector key “C’ position.
Adjust the Idling crew
○
1
to obtain the Idling RPM as follows:
Idling Speed1800±100 RPM
 Finally adjust the throttle cable play.
FUEL LINE
Inspect at initially 1000 km 630 miles r after 2 m nths) and Every 6000 km (3780 miles r
after12 m nths), replace after every 4 years.

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2-6 PERIODIC MAINTENANCE PROCEDURE
OIL PUMP:
Inspect at Initially 1000 Kms630 miles2 m nths and
every 6000 kms3780 miles r 12 m nthsthere after.
The oil pump to the engine feeds the engine oil. The amount of oil fed to
It is regulated by engine speed and oil pump control lever, which is controlled
by amount of throttle opening.
Check the oil pump in the following manner to confirm correct operation for
Throttle valve full opening position.


 Turn the throttle grip full open.
Check whether mark on the oil pump control lever’s aligned with the
index mark when the throttle valve is positioned as above.
If the marks are not aligned, loosen lock nuts and turn the adjuster in or out to align the marks.
After align the marks, tighten the locknuts.
.
Caution
Oil pump cable adjustment must be d ne after thr ttle
cable adjustment.

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2-7 PERIODIC MAINTENANCE PROCEDURE
GEAR OIL:
Inspect at initially 1000 km600 miles r 2 m nthsand every
2000 km1260 miles r 12 m nthsthereafter.
Inspect gear il peri dically as f ll ws:
 Remove the cover and hose.
 Remove the kick-start lever.
 Remove clutch cover
 Remove oil level bolt and inspect oil level, if oil level is below the
 oil hole level, Add oil until oil flows from the level hole.
 Tighten oil level bolt to the specified torque.
Tightening torque
9-15N. (0.9-1.5 kg- )
BRAKE:
Inspect at initially 1000 k 600 iles2 onths and every 6000 k 4000 iles12 onthsthereafter,
replace brake fluid after every 2 years, replace brake hose after every 4 years.
Front brake fluid level
 Keep the scooter upright and place the handlebar straight.
 Check brake fluid level by observing the lower limit line
on the brake fluid reservoir.
 When the level is below the lower limit line, replenish with
Brake fluid that meets the following specification.
Specification and classification DOT 3 or DOT4
WARNING 
The brake system f this sc ter is filled with a glyc l-based brake fluid. D n t use r mix different
types f fluid such as silic ne-based and petr leum-based. D n t use any brake fluid taken fr m
ld, used r unsealed c ntainers. Never re-use the brake fluid left ver fr m the last servicing r
st red f r l ng peri ds.

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2-8 PERIODIC MAINTENANCE PROCEDURE
BRAKE PADS (FRONT BRAKE)
Observing the limit can check the Wear condition of brake pads
Line ○
1
marked on the pad. When the wear exceeds the limit
mark, replace The pads with new ones.
CAUTION:
Replace the brake pad as a set, otherwise braking
efficiency will be adversely affected.
AIR BLEEDING FORM THE BRAKE FLUID CIRCUIT(FRONT BRAKE)
Air trapped in the fluid circuit acts like a cushion to absorb a large
proportion of the pressure developed by the master cylinder and thus
interferes with the full braking performance of the brake caliper. The
presence of air is indicated by “sponginess” of the brake lever and
also by lack of braking force. Considering the danger to which such
trapped air exposes the machine and rider, it is essential that, after
remounting the brake and restoring the brake system to the normal
condition, the brake fluid circuit is purged of air in the following manner:
 Fill up the master cylinder reservoir to the upper end of the inspection
window. Replace the reservoir cap to prevent entry of dirt.
 Attach a pipe to the caliper bleeder valve, and insert the free end of the pipe into a receptacle.