01. Faster and wiser
The new TC 125 engine sets the standard for performance in the highly competitive 125cc class and weighs in at just 39.4 lb. The lightweight engine features the latest innovations to produce more torque while retaining its high-revving 2-stroke character. These revisions ensure both beginners and seasoned professionals can ride faster on the race track while further centralisation of rotating mass inside the engine significantly benefits the overall handling of the TC 125.
The new cylinder features a 54 mm bore and due to the introduction of EFI on the TC 125, the powervalve is replaced with an innovative electronic exhaust control system. Using an actuator, the lateral exhaust port and main exhaust port open simultaneously for maximum power delivery.
A redesigned crankshaft is 300 g lighter for improved throttle response and minimal vibration. The component is precisely positioned to ensure rotational mass has very little effect on the overall handling of the motorcycle.
High-pressure die cast production processes allow for the crankcases to be manufactured with a thinner wall thickness to keep the overall weight to a minimum and optimise mass centralisation. Further aiding handling, symmetrical engine mounts improve the flex characteristics of the chassis while internally, the engine components are perfectly positioned to achieve an ideal centre of gravity.
The 6-speed gearbox is manufactured exclusively by Pankl Racing Systems and ensures the highest level of durability and reliability. For 2023, a redesigned shift drum and shift fork improve overall leverage, which ensures significantly smoother and more precise shifting. A revised gear lever tip design prevents dirt build-up.
The DS (Diaphragm Steel) clutch fitted to the TC 125 features a unique design where a single diaphragm steel pressure plate is used instead of traditional coil springs. Housed inside a CNC machined steel basket, the overall clutch design is highly durable and contributes to the compact layout of the engine.