ProX

Does the engine or chassis on your motocross, enduro or ATV need new parts? ProX makes wear and replacement parts for off-road motorcycles and ATVs, so you can keep your machine running season after season. Here you’ll find piston kits, connecting rods, valves, clutch parts, bearings, gaskets and much more for engine and chassis.

European replacement parts for off-road

ProX is a brand with roots in the Netherlands that specialises in replacement parts for motocross, enduro and ATV. The range is built around the parts that wear most when a machine is ridden hard: pistons, rings, bearings and bushings. The idea is that you can get the parts you need for an engine rebuild or a thorough chassis service from one brand, and that they fit popular models from the major Japanese and European manufacturers.

ProX’s key products

Piston kits are the core of the range and are available for both two-stroke and four-stroke engines, often in several oversizes to suit a honed or rebored cylinder. For a bigger engine rebuild you’ll find connecting rods, crankshaft parts, valves, valve springs and gasket kits. For the chassis, ProX offers wheel bearings, steering head bearings and swingarm and linkage bearing kits that remove play and make the machine more precise. There are also clutch plates and springs. See each product for model fitment.

Buy ProX from us

We specialise in performance parts and know what it takes for a project to succeed. You get a wide selection, competitive prices and personal service if you have questions along the way. Find the ProX solution for your project and take the next step towards more performance.

Frequently asked questions

How do I choose the right ProX piston size?

Measure the cylinder bore or check the size marked on the old piston. If the cylinder has been honed or rebored, choose the matching oversize. The sizes are listed on each product.

How often should swingarm and linkage bearings be replaced?

It depends on how much and in what conditions you ride. If you often ride in mud and water, check the bearings for play and rust regularly and replace them when they no longer move smoothly.