QJ Motor SKR 421 RR

High-revving four-cylinder soul, premium Italian hardware and mecha-styling

• High-revving 421cc inline four-cylinder engine with 77Bhp and 39Nm of torque • Original futuristic "Mecha" styling with aerodynamic winglets and ram-air intake • Advanced rider interface: 7-inch TFT display, smartphone connectivity, and TPMS • High-specification 176kg chassis with Brembo brakes, adjustable suspension

The QJMOTOR SRK 421 RR has officially arrived to shake up the mid-weight SuperSport category, blending aerodynamic engineering with high-speed styling. The SRK 421 RR fuses a screaming four-cylinder soundtrack with precision control to deliver an unprecedented thrill for those chasing the ultimate ride.

The heart of the SRK 421 RR is a 421cc inline four-cylinder, 16v DOHC engine producing 77Bhp (57kW) at 14,000rpm. Designed for linear and smooth power delivery, the engine is beginner-friendly while offering high-rev thrills for track-inspired performance. A peak torque of 39Nm is delivered at 13,000rpm, but still produces enough low-end urgency to ensure responsive delivery on city streets.

The engine also features DLC-treated valve tappets, an electroplated ceramic cylinder and a forged alloy steel camshaft. High-end components are also used from famed Japanese companies, including FCC paper-based clutch plates, NTN bearings, RIK piston rings, and Daido crankshaft bearings. The SRK 421 RR has been crafted by the designers of some of the most acclaimed motorcycles and features original mecha-inspired styling that creates a futuristic presence. Its aerodynamic bodywork includes bold lines, geometric cuts, and a hollowed tail section that channels airflow to reduce drag. The aggressive front face is equipped with a Ram Air intake to ensure efficient combustion and enhanced power output at speed.

Other distinctive styling touches include a three-dimensional floating taillight and a race-ready rider triangle created by lowered handlebars and raised footpegs. The 16-litre fuel tank is sculpted for ergonomic support, while the 808mm seat height ensures accessibility for a wide range of riders.

The steel-aluminium composite braided frame provides high-strength rigidity and has an even balanced weight distribution for handling agility. This is paired with fully adjustable upside-down telescopic forks and a rear multi-link shock absorber from Marzocchi. Premium stopping power is provided by Brembo radial four-piston calipers acting on 300mm dual front discs and a 240mm single rear disc, supported by a dual-channel ABS system.

The rider interface is headlined by a 7-inch TFT display featuring a multi-language menu, smartphone connectivity, and navigation mirroring. Riders can toggle between Normal and Sport modes to adapt throttle response and the level of intervention from the Traction Control System (TCS) and ABS. Sport is designed for track use, allowing slight rear wheel slip and wheelies.

Additional premium features include a Tyre Pressure Monitoring System (TPMS), an 18W dual-port USB (A&C) fast charger, and optional front and rear integrated cameras.
 
POWERFUL 16V DOHC ENGINE
The SRK 421 RR is powered by a screaming 421cc inline 4-cylinder engine that is entirely designed by QJMOTOR. It has a DOHC 16-valve over square architecture thanks to a bore of 57 mm and a stroke of 41.2 mm, it delivers an impressive power output of 77 Bhp at 14,000rpm and a maximum torque of 39 Nm offering exceptional performance from such a small capacity multi cylinder engine.
 
BREMBO BRAKES and BOSCH ABS
The front brakes feature Brembo 4 piston radial calipers paired with dual 300mm discs (with Bosch Dual channel ABS), delivering exceptional stopping power. At the rear, a single Brembo 2 piston caliper and a 240mm disc (with Bosch Dual Channel ABS) ensure progressive and safe braking
 
LARGE FUEL TANK
The QJMOTOR SRK 421 RR has a sculpted, curvaceous 16L tank, this ensures you can ride harder for longer.
 
SPORTY YET COMFORTABLE
The SRK 421 RR has style and comfort combined. The riders seat is sculpted and has a none slip cover, with a narrow step over and a seat height of only 808mm the machine is easy to maneuver.
 
FULL LED LIGHTING
The SRK 421 RR has stylish LED headlights, tail lights and indicators as standard. The LED lighting system guarantees exceptional visibility and increased safety day & night.
 
FULL COLOUR 5" TFT DASHBOARD
The dashboard is equipped with a modern and intuitive Full Colour 5-inch TFT screen offering a wealth of essential information.
 
MARZOCCHI SUSPENSION
The QJMOTOR SRK 421 RR has adjustable Marzocchi USD front forks and a rear mono-shock that gives extreme poise and control on road or track.
 
RIDER AIDS
The SRK 421 RR is loaded with technology usually only found on bigger capacity machines. Switchable Rider Modes, TCS Traction Control, TPMS Tyre Pressure and Temperature Monitoring are all fitted as standard.
 
Engine
ENGINE TYPE
4 Cylinder 16v DOHC
DISPLACEMENT
421
BORE X STROKE
57.0*41.2mm
COMPRESSION RATION
12.6:1
RATED OUTPUT
57kW/77Bhp @ 14,000rpm
MAX. TORQUE
39Nm @ 13,000rpm
LUBRICATION
Wet Sump
FUEL SUPPL
Electronic Fuel Injection
EXHAUST SYSTEM
Euro 5+ Compliant 4-1
CERTIFICATION
Euro 5
ELECTRICAL SYSTEM
12v
CLUTCH
Multiplate Wet Slipper Clutch
GEARBOX
6 Speed
FINAL DRIVE
Chain
IGNITION
ECU Bosch MSE9.0
COOLING SYSTEM
Liquid Cooled
BATTERY
12V 8Ah
STARTING
Electric
ENGINE OIL
10w40 semi-synthetic
Chassis
FRONT SUSPENSION
Marzocchi adjustable USD Forks
FRONT BRAKE
Dual Brembo Discs 300mm with Bosch Dual ChannelABS
REAR SUSPENSION
Marzocchi Adjustable Mono-shock
REAR BRAKE
Brembo Disc 240mm with Bosch Dual Channel ABS
FRONT RIM TYPE
multi spoke cast alloy
REAR RIM TYPE
multi spoke cast alloy
REAR RIM DIMENSION
17
FRONT TYRE
120/70-17
REAR TYRE
160/60-17
HEADLIGHT LAMP
LED
TAILLIGHT LAMP
LED
Dimensions
LENGTH
2020mm
WIDTH
755mm
HEIGHT
1130mm
GROUND CLEARANCE
150mm
UNLADEN WEIGHT
186kgs
USABLE TANK VOLUME
16.5L
WHEELBASE
1385mm
SEAT HEIGHT
808mm
 
Price shown is ON THE ROAD includes, Petrol, Registration & 12 months RFL. 
 
Finance and National delivery available, please call for more information or to reserve yours today.