Benelli TNT 125 2017+ Service Manual

Bikesales.com.au's own launch review captures the genuinely surprising realization at Benelli's own track-day reveal: expecting "a new litre-class rocket" on a proper racetrack, journalists instead got Benelli's own pocket-sized entry into the compact-bike segment, tested on "a go-kart track in Melbourne's northern suburbs." That same review frames the genuine market context: "Honda got the ball rolling with this genre with its Grom 125... the lead followed soon after by Kawasaki with its Z125 Pro" — Benelli's TNT 125 arrived to compete directly in that same emerging class of small, LAMS-eligible fun bikes.

Power comes from a 125cc air/oil-cooled single-cylinder four-stroke engine, four valves, a 54mm x 54.5mm bore and stroke, and a 9.8:1 compression ratio, fed by electronic fuel injection, delivering a claimed 11 hp at 9,000-9,500 rpm and roughly 7.1 lb-ft (9.6 Nm) of torque at 7,000 rpm through a 5-speed transmission. Bennetts' own head-to-head review confirms the genuine value proposition that defined this bike's launch: "at £1094 cheaper than its rival, the Benelli TNT 125 is just 67% of the price of a new Honda MSX125," while still returning "a real 86mpg" in actual road testing — genuinely strong economy for a fun, character-driven commuter rather than a purely utilitarian scooter alternative.

TheBikeMarket's own real owner review, from a 32-year-old rider with a year's experience, offers genuinely reassuring long-term feedback: "it runs great. I have no problems at the moment and have done 6,000 miles. It handles well but you can't lean too far over without catching the foot pegs... very reliable. It costs £100 each service and I'm nearly on my 4th service" — a real testament to low running costs backing up the bike's affordable purchase price. Bennetts' own review notes a genuine practical trade-off worth knowing: "if economy is all you care about, maybe choose a scooter — there's no under-seat storage here," though that same review confirms genuine aftermarket support was already emerging shortly after launch, with "some great looking adjustable anodised footpegs and levers available" through UK importer MotoGB within months of the June 2017 launch.

Autoevolution's own detailed production history confirms this exact 2017 launch specification "continued production without any changes until 2020," making this original Euro4-compliant configuration the correct reference for the vast majority of TNT 125s built during this era — a genuinely significant, dedicated engine and electronics update didn't arrive until 2021, when Benelli brought the platform up to Euro5 compliance with revised fuel injection and ECU calibration, plus the addition of Combined Braking System on both wheels. The chassis uses a steel trellis frame with an upside-down front fork, riding on cast alloy wheels, with a 790mm (31.1-inch) seat height and a genuinely light 116kg (256 lb) curb weight — dimensions built specifically for the approachable, easy-to-handle character this entire compact-naked-bike segment was designed around.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2017-onwards TNT 125 running the way it was built to.