Accossato off-road rear axle blocks RCY1 for Yamaha YZ250, black colour⟲ 360° — drag me
02 · Data & docs

The facts.

Technical data
BrandAccossato
TypeOff-road rear axle blocks with adjusting screw
Part numberRCY1
ColoursBlack, silver, blue
UseOff-road (enduro, motocross)
FitmentYamaha YZ250 (2009–2018)
CheckCompare with the application list before ordering
Road approvalNone documented, off-road and competition use
DescriptionThe whole story▼

Changing gearing on a YZ250 to suit a tighter motocross track or a faster trail is a routine adjustment for riders who move between different kinds of ground, and every change of sprocket size shifts the point at which the chain sits correctly tensioned. Accossato's RCY1 fits the YZ250 built from 2009 to 2018, a pair of rear axle blocks with their own adjusting screw that turns that follow-up adjustment into a quick job rather than a wrestling match with the axle.

Key Features

  • Rear axle blocks for the Yamaha YZ250, 2009 to 2018
  • Accossato code RCY1, supplied as a pair, left and right
  • Each block carries its own adjusting screw for chain tension
  • Blue, black or silver
  • Same pair also listed for the Suzuki RM-Z 250, Suzuki RM-Z 450, Yamaha WR250F and Yamaha YZ125
  • Accossato's RTY1 covers the same bike without the adjusting screw
  • No German ABE on file; built for off-road and competition use

Construction and Material Quality

An adjusting screw built into each RCY1 block lets the rear wheel be pushed back from that one point rather than levered into place, and both blocks locate in the slots the stock parts once occupied. Blue, black and silver are the three finishes to choose between, blue being the closest match to the YZ250's own factory look. Once a block has worn to where it no longer holds the wheel square, the pair is worth swapping for a fresh one.

Chasing Different Gearing for Different Ground

Riders who swap a YZ250 between a tight local motocross track and a faster, more open trail often change the rear sprocket to suit, tighter for the jumps and turns, taller for covering ground quickly, and each swap moves where the chain sits at the correct tension along the swingarm. An axle block with its own screw makes resetting that tension after a sprocket change a matter of counting turns on each side rather than levering the wheel back by feel. Keeping both sides even matters as much here as the tension itself, since an uneven adjustment leaves the rear wheel pointing slightly off the frame's centreline.

Fitment and Compatibility

The YZ250 falls under the RCY1's listed years of 2009 to 2018, a bracket it shares with the Suzuki RM-Z 250 and RM-Z 450 and the Yamaha WR250F and YZ125, since all of them take the identical block. A bike anywhere within that span is still worth matching against the actual frame before an order goes in. For the stock, screw-free method of adjustment on this same bike, the RTY1 fits the identical spot.

Road Approval

Accossato lists no German ABE for the RCY1, so the blocks are intended for off-road and competition use rather than for use on public roads.

Scope of Delivery

This listing covers one pair of rear axle blocks, left and right, in the colour you choose.

Specifications

  • Type: Off-road rear axle blocks with adjusting screw
  • Part number: RCY1
  • Colours: Black, silver, blue
  • Use: Off-road (enduro, motocross)
  • Fitment: Yamaha YZ250 (2009–2018)
  • Check: Compare with the application list before ordering
  • Road approval: None documented, off-road and competition use
What's includedEverything in the box▼
  • Accossato rear axle blocks
FitmentWhich bikes this fits▼
  • Yamaha YZ250 (2009–2018)
  • Suzuki RM-Z 250 (2006–2017)
  • Suzuki RM-Z 450 (2006–2017)
  • Yamaha WR250F (2009–2018)
  • Yamaha YZ125 (2009–2018)
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