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
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