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Side-by-Side Bike Comparison · September 2026

Speeder Big Monster 165 FI vs Yamaha FZ 25

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

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💎 Best Value

Speeder

Speeder Big Monster 165 FI

Engine 160 cc

Power 15.3 bhp

Mileage 40 kmpl

Brakes / ABS No

Price in BD ৳179,500

Details

⚡ Power Leader

Yamaha

Yamaha FZ 25

Engine 250 cc

Power 20.52 bhp

Mileage 40 kmpl

Brakes / ABS Dual-Channel

Price in BD ৳399,000

Details

01 / Bottom-Line Takeaway

Quick Verdict

Editorial Positioning

VALUE CHAMPION #1

Speeder Big Monster 165 FI (Speeder Big Monster 165 FI)

The Value Argument

Maximizes features per taka spent at ৳179,500. 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

Yamaha FZ 25 (Yamaha FZ 25)

The Performance Benchmark

Delivers class-leading punch with 20.52 bhp and sharp throttle response. Backed by Dual-Channel 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: 20.52 Bhp

Speeder Big Monster 165 FI (Speeder Big Monster 165 FI) 15.3 bhp @ 8000 rpm

Yamaha FZ 25 (Yamaha FZ 25) 20.52 bhp @ 8000 rpm

Peak Torque Delivery (Nm) Top: 20.1 Nm

Speeder Big Monster 165 FI (Speeder Big Monster 165 FI) 14.6 Nm @ 6000 rpm

Yamaha FZ 25 (Yamaha FZ 25) 20.1 Nm @ 6000 rpm

Claimed Top Speeds

120 km/h

Speeder Big Monster 165 FI (Speeder Big Monster 165 FI)

130 km/h

Yamaha FZ 25 (Yamaha FZ 25)

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.

Speeder

Speeder Big Monster 165 FI (Speeder Big Monster 165 FI)

8.5 / 10

Performance 8.6

Comfort 8.4

Tech & Features 7.4

Fuel Economy 9.5

Value for Money 8.8

Yamaha

Yamaha FZ 25 (Yamaha FZ 25)

8.2 / 10

Performance 9.5

Comfort 8.1

Tech & Features 7.4

Fuel Economy 9.5

Value for Money 6.6

06 / Full Technical Comparison

Specification Sheet

Show Differences Only

Bike Information 11

Bike Name	Speeder Big Monster 165 FI	Yamaha FZ 25
Brand	Speeder	Yamaha
CC	160	250
Regular Price	179500	399000
Bike Type	Naked Sports	Naked Sports
Distributor/Seller	—	ACI Motors Limited
Model Year	N/A	2025
Brand Origin	N/A	Japan
Made In	N/A	India
Assemble In	N/A	Bangladesh
Launched Date	N/A	2025-04-11

Engine 15

Engine Type	Single cylinder, 4 stroke, Oil-Cooled	4 – Stroke Single Cylinder
Displacement	163	249
Maximum Power	15.3 Bhp @ 8000 RPM	20.52 Bhp @ 8000 RPM
Maximum Torque	14.6 NM @ 6000 RPM	20.1 NM @ 6000 RPM
Bore	N/A	74.0 mm
Stroke	N/A	58.0 mm
Compression Ratio	N/A	9.8:1
Valves	N/A	2
Fuel Supply	EFI	Fuel Injection
No of Cylinders	1	1
Engine Cooling	Liquid Cooled	Oil Cooled
Starting Method	Electric	Electric
Engine Oil Grade	10W40	10W40
Engine Oil Capacity	1 L (Without Filter)	1.55 L (Without Filter)
Best Lube For	Mobil Racing 4T 10W40	Mobil Racing 4T 10W40

Transmission 4

Transmission Type	Manual	Manual
No of Gears	6	5
Clutch Type	Wet-multiplate	Wet Multiple-disc
Drive Type	Chain Drive	Chain Drive

Mileage & Top Speed 2

Mileage	40 Kmpl (Approx)	40 Kmpl (Approx)
Top Speed	120 Kmph (Approx)	130 Kmph (Approx)

Chassis & Suspension 3

Chassis Type	N/A	Diamond
Front Suspension	Telescopic USD	Telescopic Forks
Rear Suspension	Monoshock	7-Step Adjustable Monocross Suspension

Brakes 6

Front Brake Type	Single Disc	Single Disc
Rear Brake Type	Disc Brake	Disc Brake
Front Brake Diameter	N/A	282 mm
Rear Brake Diameter	N/A	220 mm
Anti-Lock Braking System (ABS)	No	Dual-Channel
Braking System	Double Disc	Dual Channel ABS

Wheels & Tyres 4

Front Tyre Size	110/70-17	100/80-17
Rear Tyre Size	130/70-17	140/70-17
Tyre Type	Tubeless	Tubeless
Wheel Type	Alloy	Alloy

Dimensions 8

Overall Length	1980 mm	2015 Mm
Overall Width	830 mm	775 Mm
Height	1120 mm	1075 Mm
Ground Clearance	180 mm	160 Mm
Weight	135 Kg	153 Kg
Fuel Tank Capacity	12 Liters	14L
Wheelbase	1350 mm	1360 Mm
Seat Height	N/A	795 Mm

Electricals 5

Battery Type	MF	mf
Battery Voltage	12V 7Ah	12V 6Ah
Head Light	LED	LED
Tail Light	LED	LED
Indicators	LED	Halogen

Features 8

Speedometer	Digital	Digital
Odometer	Digital	Digital
RPM Meter	Digital	Digital
Handle Type	Three part handle bar	Pipe handle bar
Seat Type	Split-Seat	Split-Seat
Passenger Grab Rail	No	Yes
Engine Kill Switch	Yes	Yes
Additional Feature	N/A	N/A