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Side-by-Side Bike Comparison · September 2026

GPX Demon GR250R vs Kawasaki Z900

Technical comparison of performance curves, real-world dyno numbers, verified ratings, and full dynamic spec sheets.

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💎 Best Value

GPX

GPX Demon GR250R

Engine 250 cc

Power 29 bhp

Mileage 30 kmpl

Brakes / ABS Dual-Channel

Price in BD ৳414,990

Details

⚡ Power Leader

Kawasaki

Kawasaki Z900

Engine 948 cc

Power 123.3 bhp

Mileage 17 kmpl

Brakes / ABS Dual-ch. ABS

Price in BD Price TBA

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

VALUE CHAMPION #1

GPX Demon GR250R (GPX Demon GR250R)

The Value Argument

Maximizes features per taka spent at ৳414,990. Ideal balance of equipment and accessible dealer pricing without sacrificing daily road manners.

Best for: Budget-conscious riders looking for modern styling.

POWER & HARDWARE #2

Kawasaki Z900

The Performance Benchmark

Delivers class-leading punch with 123.3 bhp and sharp throttle response. Backed by Dual-ch. ABS for riders demanding confidence in high-speed and emergency scenarios.

Best for: Highway tours, enthusiast riding, emergency brake safety.

02 / Engine Output Benchmarks

The Dyno Room

Peak Bhp & Torque Scaled

Peak Power Output (Bhp) Top: 123.3 Bhp

GPX Demon GR250R (GPX Demon GR250R) 29 bhp @ 9500 rpm

Kawasaki Z900 123.3 bhp @ 9500 rpm

Peak Torque Delivery (Nm) Top: 98.6 Nm

GPX Demon GR250R (GPX Demon GR250R) 23 Nm @ 7500 rpm

Kawasaki Z900 98.6 Nm @ 7700 rpm

Claimed Top Speeds

135 km/h

GPX Demon GR250R (GPX Demon GR250R)

240 km/h

Kawasaki Z900

Dyno takeaway: Engine cooling hardware (liquid vs oil vs air) and gear ratios determine how long peak power can be sustained on open highway runs.

03 / Multi-Vector Scorecard

AI Analysis Engine

Rule-Based Specs Synthesizer

AI Engine Recommendation

Comparing power-to-weight, braking safety gear, real mileage data, and dealer price points across this matchup. Use the 5-point radar breakdown below to balance your budget against your daily riding style.

GPX

GPX Demon GR250R (GPX Demon GR250R)

7.8 / 10

Performance 6.8

Comfort 6.7

Tech & Features 7.4

Fuel Economy 9.5

Value for Money 8.8

Kawasaki

Kawasaki Z900

8.8 / 10

Performance 9.5

Comfort 7.8

Tech & Features 9.4

Fuel Economy 8

Value for Money 9.5

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	GPX Demon GR250R	Kawasaki Z900
Brand	GPX	Kawasaki
CC	250	948
Regular Price	414990	—
Bike Type	Sports	Naked / Streetfighter
Distributor/Seller	Speedoz Limited	Asian Motorbikes
Model Year	2025	2026
Brand Origin	Thailand	Japan
Made In	China	—
Assemble In	Bangladesh	—
Launched Date	2025-08-31	—

Engine 15

Engine Type	Hyper Quadra, SOHC, 4 valve Liquid-cooled	4 Stroke, DOHC, 16 Valve, In-Line Four
Displacement	249.6	948
Maximum Power	29 Bhp @ 9500 RPM	123.3 Bhp (125 PS) @ 9500 RPM
Maximum Torque	23 NM @ 7500 RPM	98.6 NM @ 7700 RPM
Bore	77 mm	73.4 mm
Stroke	4	56.0 mm
Compression Ratio	N/A	11.8:1
Valves	4	16 valve
Fuel Supply	Fuel Injection	Fuel Injection (DFI with Dual Throttle Valves)
No of Cylinders	1	4
Engine Cooling	Liquid Cooled	Liquid Cooled
Starting Method	Electric	Electric
Engine Oil Grade	10W-40	N/A
Engine Oil Capacity	1.2 L(Without Filter)	3.8 Litres
Best Lube For	Mobil Racing 4T 10W40	N/A

Transmission 4

Transmission Type	Manual	Manual
No of Gears	6	6
Clutch Type	Wet-multiplate	Wet, Multiple-Disc, Assist & Slipper Clutch
Drive Type	Chain Drive	Chain Drive

Mileage & Top Speed 2

Mileage	30 Kmpl (Approx)	17.5 Kmpl (Approx)
Top Speed	135 Kmph (Approx)	240 Km/h (Approx)

Chassis & Suspension 3

Chassis Type	Trellis Frame	Steel Trellis Frame
Front Suspension	Upside Down Forks	41 mm Inverted Fork with Rebound Damping and Spring Preload Adjustability
Rear Suspension	Mono 7-Step Adjustable Monoshoc	Horizontal Back-Link with Rebound Damping and Spring Preload Adjustability

Brakes 6

Front Brake Type	Single Disc	Dual Disc Brake
Rear Brake Type	Disc Brake	Disc Brake
Front Brake Diameter	276 mm	300 mm
Rear Brake Diameter	220 mm	250 mm
Anti-Lock Braking System (ABS)	Dual-Channel	Dual Channel ABS
Braking System	Dual Channel ABS	Dual Channel ABS

Wheels & Tyres 4

Front Tyre Size	110/70-17	120/70 ZR17 M/C (58W)
Rear Tyre Size	150/60-R17	180/55 ZR17 M/C (73W)
Tyre Type	Tubeless	Tubeless
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	2020 Mm	2070 mm
Overall Width	747 Mm	825 mm
Height	1145 Mm	1080 mm
Ground Clearance	159 Mm	145 mm
Weight	158 kg	212 Kg
Fuel Tank Capacity	11 L	17 Liters
Wheelbase	1,350 Mm	1455 Mm
Seat Height	815 Mm	820 mm

Electricals 5

Battery Type	MF	Lead Acid (Maintenance Free)
Battery Voltage	12V 6Ah	12V
Head Light	LED	Led
Tail Light	LED	Led
Indicators	LED	Led

Features 8

Speedometer	Digital	Digital
Odometer	Digital	Digital
RPM Meter	Digital	Digital
Handle Type	Pipe handle bar	Single piece handle bar
Seat Type	Split-Seat	Split Seat
Passenger Grab Rail	Yes	Yes
Engine Kill Switch	Yes	Yes
Additional Feature	TCS (Traction Control System), Digital (TFT Display With Bluetooth Connectivily)	4.3-inch Colour TFT Meter, Bluetooth Smartphone Connectivity (Rideology App), Kawasaki Traction Control (KTRC), Integrated Riding Modes (Sport, Road, Rain, Rider), Power Modes (Full / Low), Assist & Slipper Clutch, Gear Position Indicator.

07 / Video & Photo Showcase

Media & Gallery

Click to view popup

GPX Demon GR250R (GPX Demon GR250R)

GPX

1 Photo

HD Photos 1 image

No walkaround video available for this bike

Kawasaki Z900

Kawasaki

0 Photos

No photos or videos available for this bike

08 / Real-World Trade-Offs

Strengths & Trade-offs

Pros vs Cons

Kawasaki

Kawasaki Z900

Strengths

✓ 125 PS inline-four engine delivers strong, linear power with a thrilling top-end rush.
✓ 98.6 Nm torque provides excellent flexibility and mid-range punch.
✓ Aggressive Sugomi styling gives it a proper supernaked stance.
✓ Rider-friendly electronics including traction control, riding modes and a TFT display with Bluetooth connectivity.
✓ Assist and slipper clutch keeps lever effort light and rear-wheel hop in check.

Trade-offs

✕ 212 kg kerb weight feels heavy in tight city traffic compared with smaller nakeds.
✕ Real-world mileage of around 17.5 kmpl makes it costly to run daily.
✕ Naked design offers no wind protection at highway speeds.
✕ Limited pillion comfort because of the sporty seat design.
✕ High purchase and maintenance costs in Bangladesh due to import duties and parts availability.

09 / Frequently Asked Questions

Frequently Asked Questions

From compared bikes

Kawasaki Z900 What is the Kawasaki Z900?

The Kawasaki Z900 is a supernaked motorcycle from Kawasaki's Z series, featuring the brand's Sugomi design language, a 948cc inline-four engine and a comprehensive electronics package.

Kawasaki Z900 What is the engine capacity of the Kawasaki Z900?

The Kawasaki Z900 has a 948cc liquid-cooled, four-cylinder inline engine.

Kawasaki Z900 How much power does the Kawasaki Z900 produce?

The Kawasaki Z900 produces a maximum power of approximately 125 PS (123.3 bhp) at 9,500 RPM.

Kawasaki Z900 What is the maximum torque of the Kawasaki Z900?

The Kawasaki Z900 produces approximately 98.6 Nm of maximum torque at 7,700 RPM.

Kawasaki Z900 How many gears does the Kawasaki Z900 have?

The Kawasaki Z900 comes with a 6-speed transmission with an assist and slipper clutch.

Kawasaki Z900 What is the Kawasaki Z900's top speed?

The Kawasaki Z900 is reported to have a top speed of around 240 km/h. Actual top speed can vary depending on riding conditions and specifications.

Kawasaki Z900 What is the mileage of the Kawasaki Z900?

The Kawasaki Z900 offers an approximate mileage of 17.5 kmpl, depending on riding style and road conditions.