Side-by-Side Comparison

Roadmaster Prime vs Honda Grom 125

Specs, mileage, performance & price compared in Hong Kong.

Roadmaster

Key Specifications

Roadmaster PrimeSpecHonda Grom 125

HK$38,000PriceHK$38,800

1869Engine (cc)124

9Power (hp)13

8Torque (Nm)11

55.0Mileage (km/l)45.0

100Weight (kg)103

10Fuel Tank (L)6

8.5Rating9.2

Our Pick for Hong Kong

Honda Grom 125

Based on overall rating & value

Full Specifications

Basic Information

Roadmaster PrimeAttributeHonda Grom 125

V-twinEngine TypeAir-cooled, single-cylinder, four-stroke

ManualTransmission Type5-speed manual

Wet multi-plateClutch TypeWet multiplate

Shaft driveDrive TypeChain

RoadmasterBrandHonda

Roadmaster PrimeModelMSX125

Roadmaster Roadmaster PrimeBike NameHonda Grom 125

2025Model Year2025

CruiserCategory/TypeMiniMoto

BangladeshCountry of OriginJapan

BangladeshAssembly LocationJapan

AvailableStatus—

Black, Silver, RedColors AvailableCandy Blue, Pearl White, Matte Black Metallic

Lead AcidBattery Type—

Two-upSeat Type—

Cruiser handlebarsHandle Type—

Steel double cradleFrame Type—

Twin-sidedSwingarm Type—

Engine & Performance

Roadmaster PrimeAttributeHonda Grom 125

1,869Displacement (cc)124cc

92 hpMaximum Power7.2 kW @ 7,250 rpm

158 NmMaximum Torque10.5 Nm @ 5,500 rpm

6.5Peak Power—

2Number of Cylinders1

OHVValve ConfigurationSOHC

2Valves Per Cylinder2

47.0Bore—

51.8Stroke—

100 mm x 118.4 mmBore x Stroke50.0mm x 63.1mm

9.2:1Compression Ratio10.0:1

Air-cooledCooling SystemAir-cooled

Fuel injectionFuel Supply SystemProgrammed Fuel-Injection (PGM-FI)

ElectronicIgnition SystemFull transistorized

V-twin longitudinalEngine Layout—

20W-40Engine Oil Grade—

Electric & KickStarting SystemElectric

NoEngine Kill Switch—

Euro 3Emission StandardEuro 5

NoPower Mode Indicator—

Fuel & Mileage

Roadmaster PrimeAttributeHonda Grom 125

0.8Engine Oil Capacity1.1 litres

21 LFuel Tank Capacity6.0 litres

55Mileage City45

60Mileage Highway—

150Load Capacity—

12.0Battery Capacity—

500 kmRange—

NoRange Indicator—

NoLow Fuel WarningYes

—Fuel Economy66.7 km/l

Performance & Speed

Roadmaster PrimeAttributeHonda Grom 125

85Top Speed94 km/h

NoQuick Shifter—

NoTraction Control—

Transmission & Drive

Roadmaster PrimeAttributeHonda Grom 125

6Number of Gears5

1-N-5Gear Pattern—

ChainPrimary Drive—

ChainFinal DriveChain

ChainDrive Chain/Belt Type—

Dimensions & Weight

Roadmaster PrimeAttributeHonda Grom 125

2,510 mmOverall Length1,760 mm

960 mmOverall Width720 mm

1,470 mmOverall Height1,015 mm

1,650 mmWheelbase1,200 mm

120 mmGround Clearance180 mm

765 mmSeat Height761 mm

388 kgKerb Weight103 kg

Brakes & Safety

Roadmaster PrimeAttributeHonda Grom 125

DiscFront Brake TypeSingle 220mm disc with hydraulic dual-piston caliper

DiscRear Brake TypeSingle 190mm disc with hydraulic single-piston caliper

300 mmFront Brake Size—

300 mmRear Brake Size—

Dual-channelABS TypeSingle channel ABS with IMU

NoRemote Lock—

YesHandle Lock—

YesSteering Lock—

Suspension & Handling

Roadmaster PrimeAttributeHonda Grom 125

Telescopic forksFront Suspension Type31mm inverted telescopic fork

Twin shocksRear Suspension TypeMono shock, steel square pipe swingarm

—Front Suspension Travel100 mm

—Rear Suspension Travel104 mm

Wheels & Tires

Roadmaster PrimeAttributeHonda Grom 125

130/70-18Front Tyre Size120/70-12

180/65-16Rear Tyre Size130/70-12

18Front Wheel Size—

18Rear Wheel Size—

TubeTyre TypeTubeless

RoadmasterTyre Brand—

15000Tyre Life—

AlloyWheel Type5-spoke cast aluminum

SteelWheel Material—

Electrical & Battery

Roadmaster PrimeAttributeHonda Grom 125

12.0Battery Voltage—

YesBattery Removable—

NoUSB Charging—

Lighting & Display

Roadmaster PrimeAttributeHonda Grom 125

NoError Code Display—

HalogenHeadlight TypeLED

BulbTail Light TypeLED

BulbTurn Signal Type—

NoDRL—

NoHazard Light—

AnalogDisplay TypeLCD

AnalogSpeedometer TypeDigital

AnalogOdometer TypeDigital

AnalogTachometer TypeDigital

AnalogFuel Gauge TypeDigital

YesClockYes

NoPass Light Switch—

NoSide Stand Indicator—

Technology & Features

Roadmaster PrimeAttributeHonda Grom 125

NoTrip MeterDual

NoMobile Connectivity—

NoNavigation—

NoRiding Modes—

NoReverse Mode—

Comfort & Ergonomics

Roadmaster PrimeAttributeHonda Grom 125

MinimalWind Protection—

YesPillion SeatYes

YesPillion FootrestYes

YesPillion Grab Rails—

MidFootpeg Position—

NoStorage Compartments—

NoUnder Seat Storage—

Roadmaster Prime vs Honda Grom 125: Which one should you buy in Hong Kong?

The Roadmaster Prime and Honda Grom 125 are two popular motorcycles in Hong Kong. This side-by-side comparison covers engine, power, torque, mileage, top speed and weight so you can decide which one fits your riding style and budget. Better values are highlighted in the spec table above. Use the full specifications section to compare every technical detail before making your purchase decision.

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