Radiator guards Rieju MR Pro 300i 2026 – with fan

• Rieju MR Pro 300i: 2026 (model year, bike available since 2025)

RG21 fits with the original OEM fan installed. For the Rieju MR2 250/300 2021–2025 without a fan there is the RG07.

A radiator on an enduro bike is a thin aluminium core with fins. In a fall onto its side the core bends or twists, the channels crack and coolant leaks out. Without coolant the engine overheats quickly, so a punctured radiator usually means a tow back. RG21 wraps each radiator at the side, and the inner supports brace against the bike's frame and are bolted to it, so the force of an impact goes into the frame. The factory fan stays where it is.

We bend the guards from AlMg3 aluminium sheet (EN AW-5754, PA11) 4 mm thick and TIG-weld them. After welding we clean and polish them. It is an alloy with about 3% magnesium, the kind boats are built from because it resists corrosion even in salt water. 4 mm sheet is stiff, holds its shape and stands up well to abrasion. The set weighs 0.98 kg.

The kit contains two guards, one for each radiator, and mounting hardware. You bolt the guards to the frame through the inner supports, with no drilling and no changes to the bike.

We design the guards from a 3D scan of the specific bike and cut them on CNC machines in Katowice, Poland. Professional riders test every new model before it goes on sale.