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Get more power and torque with premium quality European big bore kits that include, cylinder, piston, rings, and all gaskets required for a hassle free conversion.

Spare pistons, rings, and gaskets also available.

Can't see your bike listed here, or the product you want is not in stock? Get in touch to see if there's a kit for your model and ask about price and availability.

Athena Big Bore Kits - Honda

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items left in stock

Please note, some stock is located in store and others at our nationwide warehouse, please allow 1-2 days for collection in store or send us a message. If no stock available please email for real-time ETA
Stock Item
  • BIG BORE KIT d.82, 280cc, HONDA CRF250R '04-'09 CRF 250 X '04-'15
  • BIG BORE KIT d.82, 280cc HONDA CRF 250 R '10-'17
  • BIG BORE KIT HONDA CRF250R '18-> / CRF250RX '19-> 290cc
  • BIG BORE KIT d.100, 490cc, HONDA CRF 450 R '02-'08
  • BIG BORE KIT d.100, 490cc CRF 450 R '09-'16
  • BIG BORE KIT d.100, 490cc HONDA CRF/CRE/CRMF/CREF/CRM 450X '05-'14
  • BIG BORE KIT d.100 490cc, HONDA TRX 450R/ER QUAD-ATV '06-'14

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