With 40 hp, and an overall weight of just 17.2 kg, the TC 125 motor is at the pinnacle of performance in the competitive 125 cc class. The lightweight engine is designed to provide more torque than current 125 cc 2–stroke engines making the TC 125 easier to ride for both beginners and experienced racers. The TC 125 engine is designed to centralise rotating mass for optimal operation with the chassis resulting in a light and agile handling feel. Additionally, the roller actuated throttle assembly delivers a smooth motion when opening the throttle
The cylinder features a 54 mm bore. An innovative power valve design controls the main and lateral exhaust ports and in combination with the machined finish on the upper contour of the exhaust port, accurate port timing is guaranteed to deliver unrivalled performance.
The crankshaft is manufactured to be as light as possible and is balanced perfectly to reduce vibrations. The component is also positioned to ensure that the rotational mass created has very little effect on the handling of the motorcycle.
High-pressure die cast production processes create thin wall thicknesses for the crankcases and keeps the overall weight to a minimum. A durable kickstart intermediate gear provides exceptional starting reliability while the iconic Husqvarna logo adorns the bronze finished crankcase covers.
The TC 125 features a 38mm flat slide Mikuni TMX carburettor. The carburettor provides a smooth and controllable power delivery with optimal performance over the entire RPM range.
The 6-speed gearbox is manufactured exclusively by Pankl Racing Systems ensuring the highest level of durability and reliability. The gearbox features specific motocross gearing while the gear lever features an innovative tip design that prevents dirt build-up.
The TC 125 features a Diaphragm Steel (DS) clutch. The exclusive characteristics of this system include a single diaphragm steel pressure plate instead of traditional coil springs. The clutch basket is a single-piece CNC machined steel component that allows the use of thin steel liners and contributes to the compact design of the engine
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