Beta evo 125SS 2022 User manual

BETAUSA.COM
2-Stroke
125 / 250 / 300 / 300SS
2022
OWNERS MANUAL

1EN
EVO 2T
Thanks for you preference, and have a good time! This hand-
book contains the information you need to properly operate and
maintain your motorcycle.
The data, specifications and images shown in this manual does not constitute
an engagement on the part of BETAMOTOR S.p.A. BETAMOTOR reserves
the right to make any changes and improvements to its models at any mo-
ment and without notice.

2
EN
IMPORTANT
We recommend you to check all the tightenings after the first one
or two hours’ ride over rough ground. Special attention should
be paid to the following parts:
•rear sprocket
•ensure that the footrests are properly fixed
•front/rear brake levers/calipers/discs
•check that the plastics are properly fastened
•engine bolts
•shock absorber bolts/swingarm
•wheel hubs/spokes
•rear frame
•pipe connections
•tensioning the chain
IMPORTANT
In the event of interventions on the vehicle, contact Betamotor
after-sales service.

CONTENTS
3EN
TABLE OF CONTENTS
Operating instructions............................................................................. 5
Symbols................................................................................................5
Riding safety ......................................................................................... 6
CHAPTER 1 GENERAL INFORMATION ............................................7
Vehicle identification data .......................................................................8
Familiarizing with the vehicle...................................................................9
Specifications ......................................................................................10
Electrical system...................................................................................14
Recommended lubricants and liquids......................................................16
CHAPTER 2 OPERATION.................................................................17
Main parts .......................................................................................... 18
Checks before and after use..................................................................22
Breaking in..........................................................................................22
Fuelling............................................................................................... 23
Startup................................................................................................ 24
Engine shut-down................................................................................. 24
CHAPTER 3 ADJUSTMENTS ............................................................25
Key to symbols.....................................................................................26
Brakes ................................................................................................26
Clutch.................................................................................................27
Adjustment of gas clearance..................................................................27
Accelerator .........................................................................................28
Handlebar adjustment .......................................................................... 28
Adjusting fork ......................................................................................28
Shock absorber....................................................................................29
Suspension adjustment according to the motorcyclist’s weight .................... 30
CHAPTER 4 CHECKS AND MAINTENANCE ...................................31
Key to symbols.....................................................................................32
Gear oil.............................................................................................. 32
Coolant ..............................................................................................33
Air filter ..............................................................................................35
Spark plug ..........................................................................................37
Carburetor ..........................................................................................38
Front Brake.......................................................................................... 40
Rear brake ..........................................................................................42

CONTENTS
4
EN
Clutch control ......................................................................................45
Check of steering gear..........................................................................47
Oil fork............................................................................................... 48
Tyres...................................................................................................51
Chain .................................................................................................52
Headlight............................................................................................ 53
Rear tail light....................................................................................... 53
Cleaning the vehicle............................................................................. 54
Prolonged inactivity.............................................................................. 55
Scheduled maintenance vehicle ............................................................56
Tightening torque overview ...................................................................57
CHAPTER 5 REMOVING AND INSTALLING SUPERSTRUCTURES 59
Removing and installing saddle-mudguard assembly.................................60
CHAPTER 6 TROUBLESHOOTING ..................................................61
Troubleshooting ...................................................................................62

5EN
OPERATING INSTRUCTIONS
•The vehicle must be accompanied by: number-plate, registration document, tax
disc and insurance.
•Changes to the engine or other parts is punishable by law with severe penalties,
including the confiscation of the vehicle.
•Do not sit on the vehicle stand.
•Do not start the engine in a closed place.
WARNING
Any modifications and tampering with the vehicle during the warranty period exempt
the manufacturer from all responsibility and invalidate warranty.
SYMBOLS
SAFETY/ATTENTION
Failure to respect information marked with this symbol can entail a personal
hazard.
INTEGRITY OF THE VEHICLE
Failure to respect information marked with this symbol can entail serious damage
to the vehicle and termination of the warranty.
FLAMMABLE LIQUID HAZARD
Read the use and maintenance manual carefully.
MANDATORY TO WEAR PROTECTIVE CLOTHING
Use of the vehicle is subject to wearing specific protective clothing and safety
footwear.
PROTECTIVE GLOVES MANDATORY
To perform the operations described, it is mandatory to wear protective gloves
.
FORBIDDEN TO USE NAKED FLAMES OR POSSIBLE UNCONTROLLED
IGNITION SOURCES
NO SMOKING
DO NOT USE MOBILE PHONE
CORROSIVE SUBSTANCES HAZARD
Liquids marked with this symbol are highly corrosive: handle with care
POISONING HAZARD

6
EN
RIDING SAFETY
•Observe the Highway Code.
•Always wear approved personal safety equipment.
•Always ride with the low beam on.
•Always keep the crash helmet visor clean.
•Avoid wearing garments with hanging ends.
•Do not keep sharp or brittle objects in your pockets while riding.
•Properly adjust the rearview mirrors.
•Always ride in a seated position, with both hands on the handlebars and both
feet on the footrests.
•Never ride abreast with other vehicles.
•Do not tow and avoid being towed by other vehicles.
•Always keep a safe distance from other vehicles.
•Do not start off while the vehicle is on its stand.
•Avoid swaying and wheelies as they are extremely dangerous for your own and
other people’s safety as well as for your vehicle.
•Always apply both brakes on dry roads with no gravel and sand. Using one brake
may be dangerous and cause uncontrolled skidding.
•To reduce the braking distance, always apply both brakes.
•On wet roads and in off-road riding, drive with care and at moderate speed.
Take special care in applying the brakes.

1
GENERAL INFORMATION
7EN
CONTENTS
Vehicle identification data .......................................................................8
Frame identification ...........................................................................8
Engine identification ..........................................................................8
Familiarizing with the vehicle...................................................................9
Main parts........................................................................................ 9
Specifications ......................................................................................10
Weight...........................................................................................10
Vehicle dimensions .......................................................................... 10
Tyres.............................................................................................. 10
Wheels ..........................................................................................10
Capacities......................................................................................10
Front suspension..............................................................................11
Rear suspension ..............................................................................11
Front brake..................................................................................... 11
Rear brake ..................................................................................... 11
Engine ...........................................................................................12
Carburetor......................................................................................12
Gear box .......................................................................................13
Electrical system...................................................................................14
Electrical diagram ...........................................................................14
Legend electrical diagram ................................................................ 15
Recommended lubricants and liquids......................................................16
CHAPTER 1 GENERAL INFORMATION

1
GENERAL INFORMATION
8
EN
VEHICLE IDENTIFICATION
DATA
FRAME IDENTIFICATION
Frame identification data Aare stamped
on the right side of the steering head tube.
ENGINE IDENTIFICATION
Engine identification data Bare stamped
in the area shown in the picture.
WARNING:
Tampering with the identification numbers
is severely punished by law.
B
A

1
GENERAL INFORMATION
9EN
FAMILIARIZING WITH THE VEHICLE
MAIN PARTS
1 Fuel tank
2 Tank cap
3 Silencer
4 Rear shock absorber
5 Headlight
6 Rear light
7 Side stand
8 Fork
9 Rider’s footrests
10 Lower bumper
11 Engine
12 Front mudguard
13 Rear mudguard
14 Kick-start
15 Gear lever
16 Rear brake lever
17 Front brake lever
18 Clutch lever
19 Throttle
14
3
12
47
2
1
16
6
5
13
8
19
17
18
11
10 15 9

1
GENERAL INFORMATION
10
EN
SPECIFICATIONS
WEIGHT
VEHICLE DIMENSIONS
maximum length ....................................................................... 1990 mm
maximum width .......................................................................... 850 mm
wheelbase ............................................................................... 1305 mm
maximum height ....................................................................... 1115 mm
ground clearance ....................................................................... 310 mm
saddle height ............................................................................. 660 mm
TYRES
The use of Dunlop D803 GP tyres is recommended.
WHEELS
Dimensions
Front Rear
J 21x1,6 18x2,15
CAPACITIES
fuel tank .......................................................................................2.8 litri
including reserve ...........................................................................0.5 litri
coolant circuit:
Version EVO 125 EVO 250 EVO 300/300SS
With dry circuit [ml] 630 530 530
With circuit emptied [ml] 530 420 420
gear oil ........................................................................................550 ml
Dimensions Pressure [Bar]
Front tyre Rear tyre Front tyre Rear tyre
2.75 - 21 4.00 - 18 0.4 ÷ 0.5 0.3 ÷ 0.4
Version EVO 125 EVO 250 EVO 300/300SS
Dry weight [kg] 67.5 68.5 68.5
Front [kg] 33.75 34.25 34.25
Rear [kg] 33.75 34.25 34.25

1
GENERAL INFORMATION
11 EN
FRONT SUSPENSION
Version EVO 125 EVO 250 EVO 300/
300SS
Wheel
excursion [mm] 166 166 166
right fork
leg
left
fork leg
right fork
leg
left
fork leg
right
fork leg
left
fork leg
K spring [N/mm] X 7,6 X 7,6 X 7,6
Oil type Fuchs 5113D SAE 5
Oil quantity [g] LH 287
RH 320
Click in extension
(from fully closed) 22 X 22 X 22 X
REAR SUSPENSION
Version EVO 125 EVO 250 EVO 300/
300SS
k spring 70N/mm 70N/mm 70N/mm
precharge (spring in its seat)
[mm]
126.5 126.5 126.5
Oil type oil titan SAF 5045 Eu 137 RED
Click in extension
(from fully closed) 2,5 2,5 2,5
FRONT BRAKE
disk-type with hydraulic control Ø 185 mm
REAR BRAKE
disk-type with hydraulic control Ø 160 mm

1
GENERAL INFORMATION
12
EN
ENGINE
Version EVO 125 EVO 250 EVO 300 EVO 300SS
Type Single-cylinder, 2-stroke
Bore x stroke 54 x 54.5 72.5 x 60.5 79 x 60.5 79 x 60.5
Displacement [cm3]124.8 249.7 296.5 296.5
Pressure ratio 15.9:1 9:1 10.17:1 9.96:1
Fuel system carburetor without mixer ( 1.5% )
CARBURETOR
EVO 125 EVO 250 EVO 300/300SS
Carburetor type PWK 28 PWK 28 PWK 28
Main jet 130 125 125
Slow jet 55 48 48
Start jet
60 60 60
Needle JJH JJH JJH
Needle position
(from top) 4° 4° 4°
Air screw turns
(from all closed)
1
+
1/2
2
+
1/2
2
+
1/2
Cooling system ......................................... forced liquid circulation by pump
Spark plug ......................................................................NGK IR GR7CI-8
Clutch..................................................................................wet, multidisc

1
GENERAL INFORMATION
13 EN
GEAR BOX
Version EVO 125 EVO 250 EVO 300/300SS
Primary drive 20/71 22/69 22/69
Gear ratio 1st gear 12/34 12/34 12/34
Gear ratio 2nd gear 14/32 14/32 14/32
Gear ratio 3rd gear 15/29 15/29 15/29
Gear ratio 4th gear 18/27 18/27 18/27
Gear ratio 5th gear 24/22 24/22 24/22
Gear ratio 6th gear 28/18 28/18 28/18
Secondary drive 43/9 42/10 42/10
Ignition ...........................................................electronic Hidria 12V-110W

1
GENERAL INFORMATION
14
EN
ELECTRICAL SYSTEM
ELECTRICAL DIAGRAM
Key to colours
Bi = White
Ve = Green
Ma= Brown
Vi = Purple
Bl = Blue
Ne = Black
Gi = Yellow
Rs = Red
Ar = Orange
Az = Sky-blue
Ro = Pink
Gr = Grey

1
GENERAL INFORMATION
15 EN
LEGEND ELECTRICAL DIAGRAM
1) Horn 12V
2) Horn button
3) Headlamp LED
4) Thermal switch
5) Electrofan
6) Frame earth
7) Engine stop button
8) Switch for change mapping
9) Tail light LED
10) H.T. coil
11) Spark plug
12) Stator
13) Pick-up
14) Electronic control unit
15) Regulator 12V

1
GENERAL INFORMATION
16
EN
RECOMMENDED LUBRICANTS AND LIQUIDS
For better operation and longer vehicle life, we advise you to use the products listed
in the following chart:
PRODUCT TYPE SPECIFICATIONS
OILMIXTURE LIQUI MOLY RACING SYNTH 2T
GEAR AND CLUTCH OIL LIQUI MOLY RACING 4T 10W-30
BRAKE OIL LIQUI MOLY BRAKE FLUID DOT4
CLUTCH ACTUATOR OIL LIQUI MOLY BRAKE FLUID DOT4
FORK OIL FUCHS 5113D SAE 5
TIE ROD GREASE LIQUI MOLY SCHMIERFIXIX
LIQUID COOLANT LIQUI MOLY COOLANT READY MIX
RAF12 PLUS

2
OPERATION
17 EN
CHAPTER 2 OPERATION
CONTENTS
Main parts .......................................................................................... 18
Fuel valve .......................................................................................18
Starter............................................................................................ 18
Clutch lever .................................................................................... 19
RH switch .......................................................................................19
Switch for change mapping ..............................................................19
Front brake lever and gas control ...................................................... 20
Gearchange lever............................................................................20
Brake pedal....................................................................................20
Kick-start ........................................................................................ 20
Checks before and after use..................................................................22
Breaking in..........................................................................................22
Fuelling............................................................................................... 23
Startup................................................................................................ 24
Engine shut-down................................................................................. 24

2
OPERATION
18
EN
MAIN PARTS
FUEL VALVE
Fuel valve has three positions:
OFF: fuel supply closed. Fuel cannot pass
from the tank to the carburettor.
ON: fuel supply enabled. Fuel flows from
the tank to the carburettor. The tank empties
until it reaches the reserve level.
RES: reserve fuel supply. Fuel flows from
the tank to the carburettor and the tank
empties completely.
Attention!
During competition use or extreme “trial
zone” is advising to position the fuel tap on
“RES” to guarantee an optimal fuel supply
in all condition use.
STARTER
The starter lever is located on the carbu-
rettor.
To operate the lever pull up.

2
OPERATION
19 EN
CLUTCH LEVER
Clutch lever 1is fitted to the left-hand side
of the handlebars.
RH SWITCH
The off switch is positioned on the right-
hand side of the handlebar and consists
of the following:
shutdowns engine : it is necessary to
hold it until the engine stops.
SWITCH FOR CHANGE MAPPING
The switch for change mapping is located
on the tank cover.
By acting on the switch shown in the figure,
it is possible to select one of two possible
mappings for the ignition advance.
With the switch in position , “soft” map-
ping more suited to muddy terrain and for
a gentler response of the bike is selected.
With the switch in position “hard”
mapping that is more suitable for dry land
and for a more aggressive response of the
bike is selected.
1
This manual suits for next models
2
Table of contents
Other Beta Motorcycle manuals

Beta
Beta RR 4T-250 Instruction manual

Beta
Beta X-Trainer 300 2T User manual

Beta
Beta EVO 4T 2012 User manual

Beta
Beta RR 525 User manual

Beta
Beta EVO 4T User manual

Beta
Beta RR 250 2T EUROPA 2019 User manual

Beta
Beta X-Trainer 300 2T User manual

Beta
Beta 2008 URBAN 125cc User manual

Beta
Beta RR 125 LC User manual

Beta
Beta Rev 4T User manual

Beta
Beta Evo4t 300 User manual

Beta
Beta RR 350 User manual

Beta
Beta Motard M4 User manual

Beta
Beta REV 3 User manual

Beta
Beta 250-300 RR Manual

Beta
Beta RR 4T ENDURO 2014 350 Guide

Beta
Beta Minicross R 10 User manual

Beta
Beta EVO 2T 2010 User manual

Beta
Beta RR 50 CC series User manual

Beta
Beta EVO 2T User manual