2 of 3 selected:
Big Boy Monster Utility 250Big Boy Monster Utility 250×
KAYO AYAY 70KAYO AYAY 70×
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Key Specs at a Glance

Full Specifications

2025 Big Boy Monster Utility 250× Remove2025 KAYO AYAY 70× Remove
Engine Spec
Engine Capacity (cc / Ci )250 / 15.2 ✓70 / 4.3
Instrumentation
Temperature Warning TypeLightLight
SpeedometerStandardStandard
Service ReminderStandardStandard
Hour MeterStandardStandard
Fuel Level Warning TypeGaugeGauge
ClockStandardStandard
Trip OdometerStandardNo
Trip ComputerStandardNo
Digital InstrumentationStandardStandard
Towing
Towing Capacity (Kg / Lbs.)300 / 661 ✓–
Rear HitchReceiver–
Lighting
LightingHalogenHalogen
Seats
Seat AdjustableNoNo
Seat MaterialVinylVinyl
Seat LocationDriverDriver
Number Of Seats11
Seat Height (mm / in.)850 / 33.5650 / 25.6 ✓
Storage
Storage Capacity (l)9.469.46
Storage Capacity (gal)2.52.5
Storage Capacity (Cu. ft)0.330.33
Rear Storage WellStandardStandard
Front Storage WellStandardStandard
Fender Storage LocationFrontFront
Racks and Payload
Rear RackStandardStandard
Seats
Seat TypeOne-PieceOne-Piece
Racks and Payload
Front RackStandardStandard
Lighting
HeadlightsStandardStandard
Colours
MetallicNoNo
Manufacturer and Warranty
Recommend Minimum Age16 ✓6
Manufacturer CountryChinaChina
Steering
Steering TypeManualManual
Exterior - Safety and Design
Snorkel Air IntakeStandardNo
Shock CoverNoNo
Rear Stabilizer BarYesNo
Rear Fender FlairsStandardStandard
Rear FenderStandardStandard
Radiator GuardYesNo
Light GuardNoNo
Hand GripsStandardStandard
Lighting
Halogen HeadlightsStandardStandard
Exterior - Safety and Design
Full Length Skid PlateYesNo
Front FenderStandardStandard
Front Fender FlairsStandardStandard
Front BumperStandardStandard
FrameSteelSteel
Folding Foot PegsStandardNo
Floor Board LocationDriverDriver
CV Boot CoverNoNo
Brush GuardNoNo
Body MaterialPlasticPlastic
Bash Plate (Rear)YesNo
Bash Plate (Front)YesNo
Front Stabilizer BarNoNo
Manufacturer and Warranty
Parent CompanyBig BoyKAYO
Fuel
Fuel Tank Capacity (l / gal.)10.0 / 2.62.0 / 0.5
Tires and Rims
Rim MaterialSteelSteel
Suspension
Rear Travel (mm / in.)220 / 8.7 ✓140 / 5.5
Swing Arm Skid PlateNoNo
A-Arm Skid Plate (Rear)NoNo
Suspension RearSwingarm with single shock coil spring oil dampedSwingarm with single shock coil spring oil damped
Front Adjustable Rebound DampingNoNo
Front Adjustable Fork Pre-LoadNoNo
Suspension - Front Travel (mm / in.)220 / 8.7 ✓140 / 5.5
A-Arm Skid Plate (Front)YesYes
Front SuspensionIndependent double A-arm coil spring oil dampedIndependent double A-arm coil spring oil damped
Brakes
Brakes RearSealed mechanical drum brakeDrum brake
Front Brake Diameter (mm / in.)180 / 7.1 ✓–
Suspension
Rear Adjustable Rebound DampingNoNo
Brakes
Brakes FrontSingle hydraulic disc brakeDrum brakes
Engine Spec
Fuel TypePetrolPetrol
Fuel SystemCarburetorCarburetor
Compression Ratio9.5:19.4:1
Bore Stroke(in)2.64in. x 2.76in.1.85in. x 1.63in.
Bore Stroke(mm)67.0mm x 70.0mm47.0mm x 41.4mm
Engine CylindersSingle-CylinderSingle-Cylinder
Engine CoolingAir-cooledAir-cooled
Engine Type4-Stroke4-Stroke
Total Valves22
Valve Configuration2-valves2-valves
Engine ValvesSOHCSOHC
IgnitionCDI ElectronicCDI Electronic
Tires and Rims
Rear Solid AxleNoNo
Suspension
Rear Adjustable Shock Spring Pre-LoadNoNo
Dimensions and Weight
Width (mm / in.)1100 / 43.3900 / 35.4 ✓
Tires and Rims
Rear Rim Diameter (in)12 ✓8
Rear Tire Width (in)107 ✓
Rear Tire Diameter (in)24 ✓19
Tires Rear24 x 10-12 ✓AT19 x 7-8
Front Rim Diameter (in)12 ✓8
Front Tire Width (in)87 ✓
Front Tire Diameter (in)24 ✓19
Tires Front24 x 8-12 ✓AT19 x 7-8
Tube / TubelessTubelessTubed
Tire MakeMaxxisDunlop
Transmission (Gearbox) and Final Drive
ReverseYesNo
Dimensions and Weight
Length (mm / in.)2000 / 78.71405 / 55.3 ✓
Transmission (Gearbox) and Final Drive
Hi / Low RangeYesNo
Limited Slip Diff LocationNULLNULL
Primary Drive - Front WheelsChainNULL
Primary Drive Engine / TransmissionBeltChain
Drive line Modes2WD2WD
Final DriveChainChain
Transmission MakeBig BoyKAYO
Transmission5-speed manual with reverse ✓Automatic V-belt with centrifugal clutch
Dimensions and Weight
Dry Weight (Kg / Lbs.)250 / 55082 / 180 ✓
Wheelbase (mm / in.)1300 / 51.2925 / 36.4 ✓
Ground Clearance (mm / in.)220 / 8.7 ✓140 / 5.5
Height (mm / in.)1150 / 45.3708 / 27.9 ✓
Transmission (Gearbox) and Final Drive
Diff Lock LocationNULLNULL
Manufacturer and Warranty
Warranty Info12-month limited warranty12-month limited warranty

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Pros & Cons

2025 Big Boy Monster Utility 250

✓ Pros
  • Largest engine in this comparison (250cc)
  • Highest rated towing capacity (300kg)
  • Best ground clearance — handles rough terrain well
  • Independent front suspension for better ride comfort
✗ Cons
  • Heavier than the 2025 KAYO AYAY 70

2025 KAYO AYAY 70

✓ Pros
  • Lightest of the group — easier to manoeuvre
  • Independent front suspension for better ride comfort
  • Lower seat height — more accessible for shorter riders
✗ Cons
  • Smaller engine than the 2025 Big Boy Monster Utility 250

Comparing 2025 Big Boy Monster Utility 250 vs 2025 KAYO AYAY 70 — Common Questions

Which has the most powerful engine?
The 2025 Big Boy Monster Utility 250 has the largest displacement at 250cc, making it the most powerful in this comparison. A larger engine generally means more torque for towing and off-road work.
Which quad is the lightest?
The 2025 KAYO AYAY 70 is the lightest at 82kg (dry weight). A lighter quad is easier to manoeuvre on trails and simpler to recover if stuck.
Which is best for farm work and towing?
For heavy farm use the 2025 Big Boy Monster Utility 250 has the highest towing capacity at 300kg. For general farm duties any quad with 4WD and a towing rating above 400kg is suitable for light implements, spray rigs and game-reserve work.
Which has the better suspension?
Independent front suspension (A-Arm or IFS) absorbs bumps better than solid-axle designs and improves handling on uneven terrain. Check the Suspension category in the full table above to compare front and rear travel for each model.
Which is the easiest to ride?
CVT automatic transmission is easiest for beginners — there is no gear-changing or clutch to manage. A lower seat height also makes a quad more accessible for shorter riders. Check the Transmission and Seat Height rows in the table above.
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