ORO2U Dirt Catalogue - Section E - Engine and Performance.

Cylinder Works

Cylinder Kits

Standard Cylinder Only

Standard Bore Cylinder Kit

Big Bore Cylinder Kit

HONDA Models 4-Stroke

Years Disp. Dia. 2007 - 09 150cc 66mm 2010 - 11 150cc 66mm 2012 - 25 150cc 66mm

Part No. 56-K116 56-K116 56-K116 56-K116

Disp. Dia.

Part No.

Disp. Dia.

Oversize Part No.

CRF 150 R/RB CRF 150 R/RB CRF 150 R/RB CRF 150 R/RB

.66.CW .66.CW .66.CW .66.CW

160cc 68mm +2mm

.68.CKW1

56-K116

160cc 68mm +2mm

.68.CKW2

56-K116

2026

150cc 66mm

256cc 79mm +1mm Replacement Vertex Piston Kit: Replacement Top End Gaskets: 270cc 81mm +3mm Replacement Vertex Piston Kit: Replacement Top End Gaskets: 270cc 80mm +3mm

.79.CKW

56-K100

.79.GKW

56-K100

CRF 250 R

2004 - 09 250cc 78mm

.78.C.W

56-K100

.81.K.W

56-K100

.81.G.CW

56-K100

.80.WORK

56-K134

CRF 250 R

2010 - 13 249cc 76mm

.768.C.W 250cc 76mm

.768.WORK

56-K134

56-K134

Replacement Vertex Piston Kit: 23653

270cc 80mm +3mm

.80.WORK

56-K134

CRF 250 R

2014 - 17 249cc 76mm

.768.C.W

56-K134

Replacement Vertex Piston Kit: 23653

CRF 250 R

2018 - 19

.79_STD.CW 250cc 79mm

.79_STD.CWK 270cc 82mm +3mm

.82_BB.CWK

56-K197

56-K197

56-K197

CRF 250 R (High Comp. 14.6:1)

Replacement Vertex Piston Kit: 23535

2018 - 19

250cc 79mm

.79_HC.CWK

56-K197

270cc 82mm +3mm

.82_BB.CWK

56-K197

CRF 250 R

2020 - 21 250cc 79mm

.79_STD.CW 250cc 79mm

.79_STD.CWK1

56-K197

56-K197

Replacement Vertex Piston Kit: 23535

CW11011K02**

CRF 250 R CRF 250 R

2022 - 25 250cc 79mm

.79_STD.CW 250cc 79mm

.79_STD.CWK2 270cc 82mm +3mm

56-K197 56-K197 56-K197 56-K197 56-K197

56-K197

2026 2025 2026 2019

250cc 79mm 250cc 79mm 250cc 79mm 250cc 79mm

.79_STD.CW

CW11011K02**

CRF 250 RWE CRF 250 RWE CRF 250 RX

.79_STD.CW 250cc 79mm

.79_STD.CWK2 270cc 82mm +3mm

56-K197

.79_STD.CW

.79_STD.CW 250cc 79mm

.79_STD.CWK 270cc 82mm +3mm

.82_BB.CWK

56-K197

56-K197

CRF 250 RX (High Comp. 14.6:1)

Replacement Vertex Piston Kit: 23535

2019

250cc 79mm

.79_HC.CWK

56-K197

270cc 82mm +3mm

.82_BB.CWK

56-K197

CRF 250 RX

2020 - 21 250cc 79mm

.79_STD.CW 250cc 79mm

.79.CWK

56-K197

56-K197

Replacement Vertex Piston Kit: 23535

CW11011K02**

CRF 250 RX CRF 250 RX

2022 - 25 250cc 79mm

.79_STD.CW 250cc 79mm

.79_STD.CWK2 270cc 82mm +3mm

56-K197 56-K197

56-K197

2026

250cc 79mm

.79_STD.CW

256cc 79mm +1mm Replacement Vertex Piston Kit: Replacement Top End Gaskets: 270cc 81mm +3mm Replacement Vertex Piston Kit: Replacement Top End Gaskets: 488cc 100mm +4mm

.79.CKW

56-K100

.79.GKW

56-K100

CRF 250 X

2004 - 17 250cc 78mm

.78.C.W

56-K100

.81.K.W

56-K100

.81.G.CW

56-K100

.100.CKW

56-K100

CRF 450 R

2002 - 08 449cc 96mm

.096.CW

56-K101

Replacement Vertex Piston Kit: 22966

480cc 99mm +3mm Replacement Vertex Piston Kit: Replacement Top End Gaskets: 480cc 99mm +3mm Replacement Vertex Piston Kit: Replacement Top End Gaskets: 480cc 99mm +3mm

.099.CKW1

56-K142

CRF 450 R

2009 - 12 449cc 96mm

.096.C.W 449cc 96mm

.096.CKW

56-K142

56-K142

.099.GKW

56-K142

.099.CKW2

56-K142

CRF 450 R

2013 - 16 449cc 96mm

.096.C.W

56-K142

.099.GKW

56-K142

.099.CKW

56-K188

CRF 450 R

2017 - 18 450cc 96mm

.096.CYW 450cc 96mm

.096.CKW

56-K188

56-K188

Replacement Vertex Piston Kit: 24198

11010-K02**

480cc 99mm +3mm

CRF 450 R / RWE

2019 - 20 450cc 96mm

.096.CYW 450cc 96mm

.096.CKW2

56-K188

56-K188

Replacement Vertex Piston Kit: 24198

11010-K03**

CRF 450 R / RWE CRF 450 R / RWE

2021 - 25 450cc 96mm

.096.CYW 450cc 96mm

.096.CKW3

480cc 99mm +3mm

56-K188 56-K188

56-K188

2026

450cc 96mm

.096.CYW

480cc 99mm +3mm

.099.CKW

56-K188

CRF 450 RX

2017 - 18 450cc 96mm

.096.CYW 450cc 96mm

.096.CKW

56-K188

56-K188

Replacement Vertex Piston Kit: 24198

11010-K02**

480cc 99mm +3mm

CRF 450 RX

2019 - 20 450cc 96mm

.096.CYW 450cc 96mm

.096.CKW2

56-K188

56-K188

Replacement Vertex Piston Kit: 24198

11010-K03**

CRF 450 RX CRF 450 RX

2021 - 25 450cc 96mm

.096.CYW 450cc 96mm

.096.CKW3

480cc 99mm +3mm

56-K188 56-K188

56-K188

2026

450cc 96mm

.096.CYW

480cc 99mm +3mm

.099.CKW

56-K115

CRF 450 X

2005 - 17 449cc 96mm

.096.CW

56-K115

Replacement Vertex Piston Kit: 23595

**Please note these items are By Order Only

*Please visit our website for current prices E105

E-mail: sales@oro2u.com

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