Beta Rev 4T User manual

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OWNER’S MANUAL
Thank you for choosing
Betamotor. We hope you enjoy
your motorcycle.
This booklet provides
the information you will need
to use and maintain
your bike properly.
The details and specifications given in
this manual do not commit BETAMOTOR
S.p.A, who reserve the right to make
changes to their models at any time.

CAUTION
It is important, after the first hour of break-in, to check
the tightness of all fasteners, paying particular attention
to the following:
• Footrest brackets
• Front and rear brake discs
• Wheel spokes
• Shockabsorber bolt
• Engine bolts
• Rear sprocket
• Exhaust bolts

ENGLISH Index
Index
CHAPTER 1: GENERAL INFORMATION
INDEX OF TOPICS
Principal parts.................................................................................................................................................................................................................44
Vehicle identification details.................................................................................................................................................................................44
Engine identification details..................................................................................................................................................................................44
Console and controls..................................................................................................................................................................................................44
Technical details.............................................................................................................................................................................................................45
Wiring scheme................................................................................................................................................................................................................46
CHAPTER 2: Operation and Use
INDEX OF TOPICS
Filling the fuel tank......................................................................................................................................................................................................48
Start-up ...............................................................................................................................................................................................................................48
Break-in .............................................................................................................................................................................................................................50
Checks and maintenance before and after use off-road ..................................................................................................................50
Recommended lubricants and liquids............................................................................................................................................................. 51
CHAPTER 3: MAINTENANCE AND CHECKS
INDEX OF TOPICS
Lubrication circuit.........................................................................................................................................................................................................53
Engine oil............................................................................................................................................................................................................................54
Brake master cylinder fluid...................................................................................................................................................................................57
Brakes circuit bleeding ............................................................................................................................................................................................59
Clutch master cylinder fluid ..................................................................................................................................................................................60
Clutch circuit bleeding...............................................................................................................................................................................................60
Fork oil ................................................................................................................................................................................................................................ 61
Air filter ..............................................................................................................................................................................................................................62
Sparkplug ..........................................................................................................................................................................................................................63
Front brake ......................................................................................................................................................................................................................64
Rear brake ........................................................................................................................................................................................................................65
Coolant ................................................................................................................................................................................................................................66
Checks after cleaning ................................................................................................................................................................................................66
Scheduled maintenance ........................................................................................................................................67
CHAPTER 4: ADJUSTMENTS
INDEX OF TOPICS
Brake adjustment ........................................................................................................................................................................................................69
Clutch adjustment .......................................................................................................................................................................................................69
Carburettor ......................................................................................................................................................................................................................70
Tickover adjustment ..................................................................................................................................................................................................70
Throttle free clearance adjustment .................................................................................................................................................................70
Steering paly check and adjustment................................................................................................................................................................ 71
Chain tension .................................................................................................................................................................................................................. 71
Front suspension adjustment ..............................................................................................................................................................................72
Rear shockabsorber adjustment .......................................................................................................................................................................72
CHAPTER 5: WHAT TO DO IN AN EMERGENCY
INDEX OF TOPICS
Troubleshooting.............................................................................................................................................................................................................74
Pag.

Chapter 1
General information
INDEX OF TOPICS
Principal parts
Vehicle identification details
Engine identification details
Console and controls
Technical details
Wiring scheme
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General information
44
1
6
2
3
5
4
A
B
1
42
3
VEHICLE IDENTIFICATION DETAILS
Frame identification
The frame identification details (A) are
stamped on the right-hand side of
the headstock.
ENGINE IDENTIFICATION DETAILS
The engine identification details (B) are
stamped in the area indicated in the pic-
ture.
CONSOLE AND CONTROLS
1 Clutch lever
2 Front brake lever
3 Throttle twistgrip
4 Hot start lever
PRINCIPAL PARTS
1 - Filter box 2 - Fuel tank 3 - Fuel filler cap 4 - Silencer
5 - Kickstart lever 6 - Filter cover

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General information
45
TECHNICAL DETAILS
Vehicle weight
- in running order (dry) .......................................................................................................................... 75 kg
Dimensions
- overall length .................................................................................................................................. 2015 mm
- overall width ..................................................................................................................................... 825 mm
- overall height ..................................................................................................................................1.160 mm
- wheelbase .......................................................................................................................................1.319 mm
- seat height ......................................................................................................................................... 680 mm
- ground clearance ............................................................................................................................ 320 mm
Tyres
- pressure kPa ........................................................................................................front 39-44 / rear 29-34
- tyre sizes .......................................................................................................... front 2.75- 21” (Tube Type)
rear 4.00 - 18” (X11Tubeless)
Capacities
- fuel tank ............................................................................................................................................. 2.2 litres
- cooling circuit ....................................................................................................................................... 600 cc
- engine oil ...........................................................................................BARDAHL XT C60 15W50 - 900 cc
Front suspension
- hydraulic forks with 38 mm stanchions, rebound and spring preload adjustment
Fork oil capacities:
- right leg .....................................................................................................................................................370 cc
- left leg ...................................................................................................................................................... 350 cc
Rear suspension
- progressive hydraulic monoshock, with rebound and spring preload adjustment
Front and rear brake discs
- disc, with hydraulic control
Engine
- type ............................................................Single cylinder, 4-stroke, 4 valve head, SOHC. (ZD3E77)
- bore x stroke .............................................................................................................................. 77x53.6 mm
- displacement (cm3) ..............................................................................................................................249.6
- compression ratio .................................................................................................................................11.5:1
- liquid cooling
- digital electronic ignition with magneto flywheel alternator and variable advance
- starting by kickstart
- sparkplug ......................................................................................................................................NGK CR7EB
Fuel system
- carburettor ................................................................................................................MIKUNI SE BSR 33-79
- jet ......................................................................................................................................127.5-27.5 max-min
- runs on unleaded petrol

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General information
46
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1WIRING SCHEME
CAUTION: Do not run the engine with the voltage regulator connected to the electrical ge-
nerator without also connecting the vehicle wiring harness (central system). Doing so could
cause damage to the regulator itself.
General information
STOP SWITCH
FRONT BRAKE
12V-10W FRONT DX
DIRECTION INDICATOR
PILOT LIGHT
DIRECT. INDIC.
N° 3 LAMP 12V-10W
PILOT LIGHT
12V-10W FRONT SX
DIRECTION INDICATOR
PILOT LIGHT
DRIVING BEAM
FRONT LAMP
12V-25/25W
12V-5W
FRONT LAMP
KLAXTON SWITCH
STOP SWITCH
ENGINE
DIRECT INDICATOR
DIMMER SWITCH
LAMO DIMMER
SWITCH
CONTROL GROUP
KLAXTON 12V CC 12 V ADJUSTER CONSOLE
SPARK COIL
SPARK PLUG
DIODE
GENERATOR
PICK UP
12V-10W TAIL SX
DIRECTION INDICATOR
STABILIZER
12V-10W TAIL DX DIRECT
INDICATOR
12V-5/21W TAIL LAMP
STOP SWITCH
REAR BRAKE
COLORS TABLE
Bi WHITE Gi YELLOW
Ve GREEN Rs RED
Mo BROWN Ar ORANGE
Vi PURPLE Az AZUR
Bl BLUE Ro PINK
Ne BLACK Gr GREY
FRONT LAMP 12V-20W
ELECTRIC FAN
TEMPERATURE SWITCH
GROUND
12 V ADJUSTER
FUEL COCK
KLAXTON
KLAXTON SWITCH
STOP SWITCH ENGINE
LAMP SWITCH
CONTROL GROUP
CONSOLE
SPARK PLUG
SPARK COIL
CONDENSER
GENERATOR
PICK UP
DIODE
12V-5W TAIL LAMP
TO CONNECTOR
FOR RACE TYPE
TO CONNECTOR
FOR RACE TYPE
FUEL FEED COCK
COLORS TABLE
Bi WHITE Gi YELLOW
Ve GREEN Rs RED
Mo BROWN Ar ORANGE
Vi PURPLE Az AZUR
Bl BLUE Ro PINK
Ne BLACK Gr GREY

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INDEX OF TOPICS
Filling the fuel tank
Start-up
Break-in
Checks and maintenance before
and after use off-road
Recommended lubricants and liquids
Chapter 2
Operation and Use
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Operation and use
48
A
A
ON OFF
FILLING THE FUEL TANK
Remove filler cap A. The capacity of the fuel
tank is approximately 2.2 litres.
START-UP
1 Put the gearbox in neutral.
2 WITHOUT opening the throttle, press the
kickstart lever progressively downwards,
avoiding violent strokes, to the bottom of
its travel.
NOTE:
A long period with the engine out of use, such
as when the vehicle is on its side, can lead to a
lowering of the fuel level in the carburettor float
bowl, making the bike hard to start.
in this case open manually the fuel tap by tur-
ning the lever A clockwise (ON)
Once the engine has started, reclose the fuel
tap.

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Operation and use
49
B
C
STARTING THE ENGINE FROM COLD
1 Put the gearbox in neutral.
2 Operate the choke lever B (black knob)
by pulling it outwards.
3 WITHOUT opening the throttle, press the
kickstart lever progressively downwards,
avoiding violent strokes, to the bottom of
its travel.
4 Reclose the choke as soon as the engi-
ne has warmed up (the radiator will be
warm).
STARTING THE ENGINE WHEN HOT
1 Put the gearbox in neutral.
2 Operate the hot start by pulling outward
the knob C (the red one)
3 WITHOUT opening the throttle, press the
kickstart lever progressively downwards,
avoiding violent strokes, to the bottom of
its travel.
4 Release the hot start after the engine has
run for some instants
STARTING WHEN THE BIKE HAS FALLEN
OVER
If the bike falls over, the carburettor float
bowl may empty.
1 Open manually the fuel tap by turning the
lever A clockwise (ON)
2 Put the gearbox in neutral.
3 Operate the Hot Start knob (C).
4 WITHOUT opening the throttle, press the
kickstart lever progressively downwards,
avoiding violent strokes, to the bottom
of its travel.
5 Close the fuel tap.

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Operation and use
50
BREAK-IN
The break-in period lasts for about 10 hours of use. During this period,
please observe the following recommendations:
1 For the first 3 hours of use, the engine should only be used at up to 50% of its power. The
engine speed should not exceed 7000 rpm.
2 For the next 7 hours of use, the engine should only be used at up to 75% of its power.
3 Warm the engine up well before using the bike.
4 Avoid travelling at a constant speed: varying the speed makes the components bed in uni-
formly and in less time.
CAUTION:
After the first three hours (or two fills of petrol), change the engine oil.
• Always use super unleaded petrol.
• After the first trip off-road, check all the nuts and bolts.
CHECKS AND MAINTENANCE BEFORE AND AFTER USE OFF-ROAD
To avoid unpleasant surprises while operating the vehicle, we recommend that you perform
a series of checks and maintenance jobs both before and after use. In fact, dedicating just a
few minutes to these checks and jobs will not only make riding safer, but can save you time
and money. Proceed as follows:
Tyres
Check the pressure, general condition and tread depth.
Spokes
Check that the tension is correct.
Nuts and bolts
Go over all the nuts and bolts.
Chain
Check the tension (clearance 20 mm) and, if necessary, grease it.
Air filter
Clean the filter and soak it in air filter oil.
Note:
Check that you have the vehicle’s identification documents. On cold days, before setting off we advise that you
run the engine, as a minimum, for the time required to reach the correct operating temperature. Every time the
vehicle is used off-road it needs to be cleaned carefully.

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Operation and use
51
RECOMMENDED LUBRICANTS AND LIQUIDS
To promote better operation and longer life, we recommend that you preferably use the
products listed in the table:
TYPE OF PRODUCT TECHNICAL SPECIFICATIONS
Engine oil Bardahl XT C60 15W50
Brake and clutch fluid Bardahl brake fluid dot 4
Fork oil Idemitsu oj-racing-01
Bel ray “mc 10sae 5”
Grease for linkages Bardahl outboard grease
Coolant Bardahl permanent
Filter oil Bardahl oil filter
NOTE:
When changing the fluids, we recommend that you adhere strictly to the table shown.

INDEX OF TOPICS
Lubrication Circuit
Engine Oil
Brake master cylinder fluid
Brakes circuit bleeding
Clutch master cylinder fluid
Clutch circuit bleeding
Fork oil
Air filter
Sparkplug
Front brake
Rear brake
Coolant
Checks after cleaning
Scheduled maintenance
Chapter 3
Maintenance and checks
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Maintenance and checks
53
LUBRICATION CIRCUIT
The output oil pump (1) draws in oil from
the area at the base of the gearbox through
its own mesh oil filter (2) and then sends it
to the paper oil filter (3). From here the oil,
starting from the bypass valve (4), is directed
in three different directions: by means of a
jet (5) it lubricates the piston pin and takes
heat from the crown of the piston; and it
passes through two pipes, one of which (6)
takes it to the crankshaft to lubricate the
roller bearing on the crankpin; the other
(7), whose flow is regulated by a calibrated
hole on the cylinder base gasket (8), feeds
the valvegear (9). The oil then returns to the
base of the crank chamber from the piston,
the conrod assembly and the cylinder walls,
and is drawn in by the scavenge pump (10)
through the mesh filter (11). It is pumped
through special jets (12) and lubricates the
transmission gears. The oil in the cylinder
head, however, returns to the base of the
gearbox passing through the timing case
and the inner clutch casing.
9
8
75
3
6
1
2
12
8
4
10
11
12

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Maintenance and checks
54
ENGINE OIL
Use only fully synthetic oils of a reputable
brand (BARDAHL XTC60 15W50).
CHECKING THE ENGINE OIL LEVEL
The engine oil level must be checked when
the engine is warm. Run the engine for se-
veral minutes and then switch it off. Place
the bike on a flat surface in such a way that
it is perfectly vertical.
Wait a few minutes and then check the oil
level in the sightglass located in the clutch
casing (right-hand side of the engine). The
level must be between the limits indicated
in the picture.
If necessary, remove the oil filler plug and
top up the level.
N.B. Running the engine with too little oil causes
excessive wear to the engine components.
CHANGING THE ENGINE OIL
N.B. At each oil change, the mesh filters must be
cleaned and the paper filter replaced.
N.B. The oil change must be carried out when
the engine is at working temperature. Be careful
not to scald yourself with the hot oil.
After the engine has reached operating
temperature, switch the bike off and stand
it upright.
MIN
MAX

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Maintenance and checks
55
Unscrew the oil drainplug and let all the oil
flow out into a drain pan. Thoroughly clean
the magnet on the drainplug to get rid of
the metallic impurities that it has collected.
Unscrew the plug in the left-hand casing
and use pliers to extract the filter. Clean it
carefully and blow it through with compres-
sed air. Check for damage to the O-rings,
and replace them if necessary. Refit all the
parts and tighten the plug to 15 Nm.

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Maintenance and checks
56
Carry out the same procedure for the ou-
tput mesh filter, for which the access is via
the right-hand engine casing.
Position a container under the bike, near
the cover for the paper filter, and unscrew
the bolts on the filter cover.

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Maintenance and checks
57
Then extract the paper filter using pliers.
Check the condition of the O-ring too, and
replace it if necessary.
Change the filter and refit the cover, tighte-
ning the three M6x20 bolts to 10 Nm.
Refit the oil drainplug, tightening it to 20
Nm, and refill with 0.9 litres of engine oil
(BARDHAL XTC60 15W50). Finally, tighten
the oil filler plug (A) to 10 Nm.
BRAKE MASTER CYLINDER FLUID
Front brake
Use the sight-glass (A) to check the brake
fluid level. There must always be enough
brake fluid for the level to be visible in the
sight-glass. If there is not enough, the fluid
must be brought up to the correct level. To
do this, refill the reservoir by unscrewing
the two screws (B), removing the filler cap
(C) and topping up the fluid.
A
A
C
B

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Maintenance and checks
58
Rear brake
Before you can check the rear brake fluid,
you must first remove the rear mudguard
by unscrewing the seven retaining screws
(four on the outside, one on the tank (A),
one securing the filter cover (B) and one
inside the filter box (C)). Then look throu-
gh the brake fluid reservoir (E) to check the
fluid. The level must never fall below the
minimum level line marked on the reser-
voir (E). To top up the level, remove the fil-
ler cap (F) and refill with brake fluid.
Warning
If you notice softness in the lever, there
could be an air bubble in the system. In this
case, bleed the rear brake system.
Alternatively, contact your dealer immedia-
tely.
Note:
Change the fluids in accordance with the inter-
vals in the table on page 29, using the lubricants
recommended on page 13.
BA
C
F
E