2025 BSA Bantam 350 Specifications

Name: 2025 BSA Bantam 350
Brand: BSA

Classic • Specs last verified 13 July 2026

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2025 BSA Bantam 350 Overview

For 2025, BSA offers the Bantam 350 as a classic motorcycle with 334 cc on tap. The 2025 BSA Bantam 350 is built around a Four stroke, single- cylinder, DOHC, 4 valves, twin spark plugs engine. Out on the road, the Bantam 350 delivers 21.3 kW @ 7750 rpm of peak power and 29.6 Nm @ 6000 rpm of torque. In everyday use, the 2025 Bantam 350 tips the scales at 185 kg, carries a 13-litre fuel tank, offers a seat height of 800 mm and spans a 1440 mm wheelbase. That's roughly 9.3 kg lighter than the average classic motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2025 BSA Bantam 350 spec sheet below.

2025 Bantam 350 - Pros & Cons

Strengths

Strong power output: Peak output on the Bantam 350 is 21.3 kW @ 7750 rpm and 29.6 Nm @ 6000 rpm of torque - strong numbers for what it is.
Fuel injection: No choke, no jetting, no altitude compensation to think about - fuel injection just works across a wider range of conditions than carburetion.

Considerations

Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.

Wear Points & Servicing Notes

Cooling system servicing

With Liquid-cooled, thermal management is largely automatic, but the coolant has a service life of its own - replace it on the manufacturer's interval to protect the water passages and thermostat.

Fuelling & injector care

Fuelling on the Bantam 350 comes from fuel injection. Cold starts and throttle response stay consistent across altitude and temperature, the main practical edge over a carbureted equivalent.

Brake disc and pad wear

Single 320mm floating disc, floating calliper up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.

Suspension condition on used examples

Suspension duties are handled by 41mm telescopic forks up front and Dual shock absorbers with 5-step adjustable preload at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.

Final drive maintenance

Chain final drive on the Bantam 350 means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.

Frame & chassis check

The Tubular steel dual cradle chassis chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.

Bantam 350 - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 2025 BSA Bantam 350 should cover the same ground every time: service history, chain and sprocket condition, and any oil seepage around the casings. Start it from cold if you can - a well-kept Bantam 350 settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for a Bantam 350's engine - keep to the manufacturer's interval rather than stretching it. Use the viscosity grade the manual specifies, not whatever's on sale.

Fuel system care

Injector systems like the Bantam 350's hold up well with basic care - decent fuel, an occasional cleaner additive, and draining old fuel before any layup longer than three months.

2025 BSA Bantam 350 - Frequently Asked Questions

What engine does the 2025 BSA Bantam 350 have?

The 2025 BSA Bantam 350 uses a Four stroke, single- cylinder, DOHC, 4 valves, twin spark plugs engine with 334 cc of displacement. It is liquid-cooled.

How much does the 2025 BSA Bantam 350 weigh?

The 2025 BSA Bantam 350 weighs 185 kg. This is the manufacturer's wet figure.

How much power does the 2025 BSA Bantam 350 make?

The 2025 BSA Bantam 350 produces 21.3 kW @ 7750 rpm of power and 29.6 Nm @ 6000 rpm of torque. These are peak figures.

What is the fuel tank capacity of the 2025 BSA Bantam 350?

The 2025 BSA Bantam 350 has a 13-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 216-260 km between stops.

Is the 2025 BSA Bantam 350 suitable for shorter riders?

The 2025 BSA Bantam 350 has a seat height of 800 mm. This is a moderate seat height that suits a wide range of rider heights.

What brakes does the 2025 BSA Bantam 350 have?

The 2025 BSA Bantam 350 uses Single 320mm floating disc, floating calliper at the front and Single 240mm disc, floating calliper at the rear.

What tyre sizes does the 2025 BSA Bantam 350 use?

The 2025 BSA Bantam 350 runs 100/90-18 M/C front and 150/70-ZR17 M/C rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What gearbox does the 2025 BSA Bantam 350 have?

The 2025 BSA Bantam 350 is fitted with a 6 Speed transmission.

Key Specifications

Engine

Four stroke, single- cylinder, DOHC, 4 valves, twin spark plugs

Power

21.3 kW / 29 Hp @ 7750 rpm

Torque

29.6 Nm / 21.85 lb-ft @ 6000 rpm

Top Speed

Not published by manufacturer

Weight

185 kg / 408 lbs

Fuel Capacity

13 Litres / 3.4 US gal

Full 2025 BSA Bantam 350 Specifications

Year 2025

Make Model BSA Bantam 350

Seat Height 800 mm / 31.5 in

Wheelbase 1440 mm / 56.7 in

Fuel Capacity 13 Litres / 3.4 US gal

Wet Weight 185 kg / 408 lbs

Max Power 21.3 kW / 29 Hp @ 7750 rpm

Max Torque 29.6 Nm / 21.85 lb-ft @ 6000 rpm

Displacement 334 cc / 20.4 cu in

Engine Detail Four stroke, single- cylinder, DOHC, 4 valves, twin spark plugs

Bore x Stroke 81 x 65 mm

Cooling System Liquid-cooled

Fuel Induction Fuel injection

Starter Electric

Final Drive Chain

Transmission / Drive 6 Speed

Frame Type Tubular steel dual cradle chassis

Suspension - Front 41mm telescopic forks

Suspension - Rear Dual shock absorbers with 5-step adjustable preload

Brakes - Front Single 320mm floating disc, floating calliper

Brakes - Rear Single 240mm disc, floating calliper

ABS Standard

Tyres - Front 100/90-18 M/C

Tyres - Rear 150/70-ZR17 M/C

Wheels Wire spoke alloy

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.