Collection: Cylinder Works Motorcycle Cylinder & Big Bore Kits
Shop our range of Cylinder Works motorcycle cylinder kits, replacement cylinders and big bore kits for motocross, enduro, trail and off-road motorcycles.
Cylinder Works specialises in high-quality replacement cylinder assemblies and performance engine kits, offering solutions for riders rebuilding worn engines or upgrading engine displacement.
Explore our selection of Cylinder Works standard-bore cylinder kits, big bore kits and replacement engine components for popular motorcycle manufacturers including Honda, Yamaha, Kawasaki, Suzuki, KTM and other compatible off-road models.
Cylinder Works kits are designed to provide a convenient alternative to repairing or replating a worn original cylinder, with selected kits incorporating matched pistons, gaskets and associated components.
Whether you're rebuilding a motocross engine, replacing a damaged cylinder or looking for increased engine capacity, discover Cylinder Works products at Phoenix Motos.
Find the correct Cylinder Works kit by checking your motorcycle's make, model, year, engine capacity and manufacturer part number before ordering. Kit contents and compatibility vary between applications, and big bore conversions may require additional engine modifications.
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CYLINDER KIT YFM700 GRIZZLY 14-16, WORKS CYLINDER 21104-K02 BIG BORE, 105mm 770cc 2014 - 2015 Yamaha YFM 700 FG Grizzly 4x4 ATV
Regular price £909.09 GBPRegular priceUnit price / perSale price £909.09 GBP -
CYLINDER KIT YFM700 07-13, WORKS CYLINDER 21104-K01 BIG BORE, 105mm 770cc 2007 - 2013 Yamaha YFM 700 FG Grizzly 4x4 ATV
Regular price £935.90 GBPRegular priceUnit price / perSale price £935.90 GBP -
GASKET TOP KIT YZF450 14-17 99mm, WORKS CYLINDER 21005-G02 BIG BORE
Regular price £110.02 GBPRegular priceUnit price / perSale price £110.02 GBP -
GASKET TOP KIT 06-09 YZ 450F, WORKS Cylinder 21003-G01, 480cc 2007 - 2015 Yamaha WR450F
Regular price £104.43 GBPRegular priceUnit price / perSale price £104.43 GBP -
GASKET TOP KIT 03-05 YZF450 98, WORKS CYLINDER 23001-G01, WRF450 03-06
Regular price £104.43 GBPRegular priceUnit price / perSale price £104.43 GBP -
CYLINDER KIT 03-05 YZF450 98, WORKS CYLINDER 23001-K02, WRF450 03-06
Regular price £808.27 GBPRegular priceUnit price / perSale price £808.27 GBP -
GASKET TOP KIT YZF250 14-18, WORKS CYLINDER 21010-G01 80mm, WRF250 2015-2018 270 860VG810023
Regular price £99.33 GBPRegular priceUnit price / perSale price £99.33 GBP -
CYLINDER KIT 10-12 RMZ250 80mm, WORKS 41004-K01 BIG BORE, WITH VERTEX PISTON KIT
Regular price £753.70 GBPRegular priceUnit price / perSale price £753.70 GBP -
GASKET TOP KIT 07-09 RMZ250 80, WORKS CYCLINDER 41003-G01
Regular price £92.43 GBPRegular priceUnit price / perSale price £92.43 GBP -
CYLINDER KIT 09-15 KXF450 98, WORKS CYLINDER 31011-K01 BIG BORE, KX450F KAWASAKI
Regular price £727.82 GBPRegular priceUnit price / perSale price £727.82 GBP -
CYLINDER KIT 17-18 KX250F 80, WORKS CYLINDER 31012-K01 BIG BORE, KX250F KAWASAKI
Regular price £750.00 GBPRegular priceUnit price / perSale price £750.00 GBP -
CYLINDER KIT 15-16 KX250F 80, WORKS CYLINDER 31006-K02 BIG BORE, KX250F KAWASAKI
Regular price £645.50 GBPRegular priceUnit price / perSale price £645.50 GBP -
CYLINDER KIT 11-14 KX250F 80mm, WORKS CYLINDER 31006-K01 BIG BORE, KX250F KAWASAKI
Regular price £731.50 GBPRegular priceUnit price / perSale price £731.50 GBP -
GASKET TOP KIT 09-16 KXF250 80, WORKS CYLINDER 31004-G01 BIG BORE, KX250F KAWASAKI
Regular price £92.45 GBPRegular priceUnit price / perSale price £92.45 GBP -
CYLINDER KIT 2009 KXF250 80, WORKS CYLINDER 31004-K01 BIG BORE, KX250F KAWASAKI
Regular price £731.50 GBPRegular priceUnit price / perSale price £731.50 GBP -
GASKET TOP KIT RMZ250 KXF250 80, WORKS CYLINDER 31001-G01 BIG BORE
Regular price £95.21 GBPRegular priceUnit price / perSale price £95.21 GBP