ORO2U Dirt Catalogue - Section E - Engine and Performance.

Cylinder Kits

Cylinder Works

Cylinder Works Cylinder Kits An alternative to costly OEM cylinders or the time consuming process of re-plating existing cylinders, Cylinder Works offers enthusiasts access to a complete line of OEM quality dirt bike and ATV replacement cylinders and cylinder kits. In addition to standard bore, stock compression replacement cylinder kits. Each kit comes complete with the piston, rings, and gaskets to get back on the track or trail quickly. The quality of a cylinder is only as good as the manufacturing. Each Cylinder Works cylinder is designed, machined, inspected for quality and matched to its components right at out home facility in Urbandale, Iowa. Cylinder Works OEM Replacement Cylinders & Cylinder Kits Each Cylinder Works replacement cylinder is: Stock in appearance, Precision honed, Nickel silicon carbide plated, OEM quality without the OEM price. Cylinder Works replacement cylinder kits also contain: Gaskets and seals needed for installation, Hand fitted, premium-quality Vertex piston kit complete with piston rings, pin and circlips. Cylinder Works Big Bore Cylinders & Cylinder Kits With the exception of a mechanic, the Cylinder Works big bore kits provide everything you need to transform a bike or ATV from modest to monster in one box. In addition to the stock appearing, nickel silicon carbide plated, precision honed, big bore cylinder, each kit contaisn: All the nedded gaskets and seals to complete the installation, A Vertex forged big bore piston complete with piston rings, pin and circlips.

Made in the USA The quality of a cylinder is only as good as the manufacturing. Each Cylinder Works cylinder is designed, machined, inspected for quality and matched to its components right at out home facility in Urbandale, Iowa.

Standard Cylinder Only

Standard Bore Cylinder Kit

Big Bore Cylinder Kit

GASGAS

Models 2-Stroke

Years cc. 2021 - 23 50 2021 - 23 65 2021 - 25 85

Dia.

Part No.

cc.

Dia.

Part No.

cc.

Dia.

Oversize Part No.

MC 50 MC 65 MC 85 MC 125

39mm 56-K2915.395.CYL.CW 50 45mm 56-K195.45.CKW 65 47mm 56-K290.47.CYL.CW 85

39mm 56-K2915.395.CK.CW

50005-K01**

45mm

47mm 56-K290.47.CK.CW

2021 - 23 125 54mm 56-K1991.54.CW 125 54mm 56-K1991.54.CWK2 2021 - 23 300 72mm 56-K203.72.CYL.CW 300 72mm 56-K203.72.CK.CW

EC/EX 300

Models 4-Stroke

Years cc.

Dia.

Part No. CW50015**

cc.

Dia.

Part No.

cc.

Dia.

Part No.

CW50015K01**

EC 250F

2024 - 25 250 81mm

250 81mm

270 81mm +3mm 56-K178.81.CKW Uses Vertex Piston Kit: 24142

50006-K01**

EX 250F

2021 - 22 250 78mm 56-K178.78.CW 250 78mm

EX 250F EX 250F

2023

250 78mm 56-K178.78.CW

CW50015**

CW50015K01**

2024 - 25 250 81mm

250 81mm

270 81mm +3mm 56-K178.81.CKW Uses Vertex Piston Kit: 24142

50006-K01**

MC 250F

2021 - 22 250 78mm 56-K178.78.CW 250 78mm

MC 250F MC 250F

2023

250 78mm 56-K178.78.CW

CW50015** CW50015**

CW50015K01** CW50015K01**

2024 - 25 250 81mm 2023 - 25 250 81mm

250 81mm 250 81mm

MC 250F Factory Ed.

CW51008K01**

366 90mm +2mm Uses Vertex Piston Kit: 24238

EC 350F

2021 - 22 350 88mm 56-K2917.88.CYL.CW 350 88mm 56-K2917.88.CK.CW

EC 350F

2023

350 88mm 56-K2917.88.CYL.CW

CW51008K01**

366 90mm +2mm Uses Vertex Piston Kit: 24238

EX 350F

2021 - 22 350 88mm 56-K2917.88.CYL.CW 350 88mm 56-K2917.88.CK.CW

EX 350F

2023

350 88mm 56-K2917.88.CYL.CW

CW51008K01**

366 90mm +2mm Uses Vertex Piston Kit: 24238

MC 350F

2022

350 88mm 56-K2917.88.CYL.CW 350 88mm 56-K2917.88.CK.CW

MC 350F EX 450F EX 450F MC 450F MC 450F EC 500F

2023

350 88mm 56-K2917.88.CYL.CW

2021 - 22 450 95mm 56-K2918.95.CYL.CW 450 95mm 56-K2918.95.CK.CW

2023

450 95mm 56-K2918.95.CYL.CW

2021 - 22 450 95mm 56-K2918.95.CYL.CW 450 95mm 56-K2918.95.CK.CW

2023

450 95mm 56-K2918.95.CYL.CW

2024 - 25 510 95mm 56-K2919.95.CYL.CW 2024 - 25 510 95mm 56-K2919.95.CYL.CW

ES 500

**Please note these items are By Order Only

*Please visit our website for current prices E104

www.oro2u.com

Tel: 01597 822 666

Fax: 01597 825 224

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