Suzuki GSXR125 2018-2020 Service Manual

Bikesales.com.au's own launch review frames this bike's genuine positioning against Suzuki's own storied history: "the new Suzuki GSX-R125 and GSX-S125 ride in the shadow of greatness. After all, Suzuki's GSX-R sportsbike range traces its proud history back to the mid-'80s, when the first GSX-R750 redefined the boundaries of what a sports motorcycle could be... any red-blooded biker knows the term 'Gixxer' and the heritage it entails. Now add to that a newcomer that, despite its size and stature, deserves every right to call itself part of the Gixxer tribe: the Suzuki GSX-R125." Wikipedia's own account confirms the genuine significance of this model's arrival for Suzuki: "it was Suzuki's first model in the 125cc class in 20 years," presented at EICMA in late 2016 as a direct competitor to the established Yamaha YZF-R125.

Power comes from a 124.4cc liquid-cooled DOHC single-cylinder engine, 4 valves, a 62.0mm x 41.2mm bore and stroke, and an 11.0-11.2:1 compression ratio, delivering a claimed 15 hp at 10,000 rpm and roughly 11.5 Nm (8.5 lb-ft) of torque at 8,000 rpm through a 6-speed gearbox with wet multi-plate clutch and chain final drive. Global Suzuki's own launch materials confirm the genuine design goal behind this engine's tuning: "the GSX-R125 combines a high-power 124cc liquid-cooled 1-cylinder DOHC engine with a lightweight and compact chassis to realize a smooth and satisfying acceleration feeling and an enjoyable riding experience in all scenarios from city streets to winding roads" — deliberately approachable performance for the learner and A1/B196-licence market this bike was built to serve.

Wikipedia's own technical account confirms a genuinely close mechanical relationship worth knowing when sourcing parts: "the basis of the fully faired Suzuki GSX-R125 is identical to the GSX-S125, the 125cc naked bike offering from the brand, there are only differences in small details such as handlebars or ignition lock. This is also proven by the use of the same type code (HSN: 1699 TSN: AAB) in the KBA database" — genuinely the same fundamental steel-backbone chassis and engine wearing different bodywork and ergonomics depending on trim. Standard equipment across this exact 2018-2020 range included large 17-inch wheels front and rear, petal-design brake discs with ABS standard, a single LED headlight, a full LCD instrument display, and Suzuki's Keyless Ignition System paired with the Easy Start System — genuine convenience features that firing the engine with a single button press, rather than a traditional key-turn-and-hold sequence. Bikesales.com.au's own spec sheet confirms the chassis runs a non-adjustable conventional fork and non-adjustable monoshock, braking through a single 290mm front disc with a twin-piston caliper and a 187mm rear disc with a single-piston caliper — genuinely simple, cost-conscious hardware appropriate for the entry-level segment. Wikipedia's own production notes confirm 2021 brought only new colorways, with a genuine Euro 5 emissions update following for the 2022 model year, closing out this original 2018-2020 specification before that regulatory revision.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2018-2020 GSX-R125 running the way it was built to.