RFX Pro Rear Axle Adjuster Blocks - Blue Chain tensionerRef : RFX00838A / 1111030001

The RFX Pro chain adjusters in blue are axle blocks designed for motocross riders who are keen on precise adjustments of their rear end. CNC machined from aluminum, these adjusters provide a clean finish and reproducible measurements to minimize inaccuracies during rear wheel alignment.

• Packaging: sold in pairs — ready to install on both the right and left sides.
• Material: machined aluminum for high dimensional precision.
• Color: blue — for a sleek look on swingarms.
• Use: facilitates exact axle positioning for correct rear wheel alignment and reproducible chain tension adjustment.

Designed for the motocross environment, these adjusters fit configurations where standard axle blocks are replaced by machined components. They offer an aesthetic and reliable alternative for teams and riders who want a clear and visible adjustment with every disassembly/reassembly.

Manufacturer reference: FXAB4030099BU

Main compatibilities (examples):

• YAMAHA YZ 450 F (2026 - 450 cm3)
• YAMAHA YZ 250 F (2026 - 250 cm3)
• YAMAHA YZ 450 F (CJ23) (2021 - 450 cm3)