Best 125cc A1 Sport Motorcycles in 2025 – Full Breakdown for Learners and New Riders 1. Yamaha R125 – The Gold Standard If there's a king of A1 sportbikes, it's the Yamaha R125. This thing is packed with tech: Variable Valve Actuation (VVA), slipper clutch, and a proper aluminium frame. It doesn’t just look like a mini R6 — it feels like one. The VVA gives it punchy acceleration across the rev range, and the deltabox frame + USD forks make it carve corners like a dream. Top speed : ~75–80 mph (120–128 km/h) Weight : 144 kg Price : Around £5,400 Bright side : It’s as close as you’ll get to a race bike at 125cc. Downside : Pricey, and the riding position is aggressive. Not the best for taller or casual riders. 2. KTM RC 125 – The Sharp One The RC 125 is basically a scalpel on two wheels. It's all about handling. A steel trellis frame, WP Apex suspension, and new-gen styling make it one of the sportiest 125s out there. It’s also got a TFT dash and race-inspired e...