PROX 28.4339-2 is an OEM-style replacement component for off-road motorcycles, made to restore reliable performance during service or repair.
Ideal for regular maintenance or rebuilding worn parts with trusted PROX quality.
PROX 28.4339-2 is a high-quality OEM-style replacement part designed for riders and mechanics who want dependable fit and performance when servicing an off-road motorcycle. When wear, play, or damage starts to affect how your bike runs, the right replacement component helps bring everything back to spec and keeps maintenance intervals predictable.
Whether you’re doing a preventative refresh or fixing a problem before the next ride, PROX parts are a trusted choice for motocross and enduro setups where reliability matters.