Cylinder Kits
Cylinder Works
Standard Cylinder Only
Standard Bore Cylinder Kit
Big Bore Cylinder Kit
YAMAHA
Models 4-Stroke
Years cc.
Dia.
Part No.
cc.
Dia.
Part No.
cc.
Dia.
Oversize Part No.
270 80mm +3mm 56-K103.80.CKW Uses Vertex Piston Kit: 23925 270 80mm +3mm 56-K103.80.CKW Uses Vertex Piston Kit: 23925 270 80mm +3mm 56-K170.80.CKW Uses Vertex Piston Kit: 23943 270 80mm +3mm 56-K170.80.CKW Uses Vertex Piston Kit: 23943 270 80mm +3mm 56-K250.80.CKW 270 80mm +3mm 56-K103.80.CKW Uses Vertex Piston Kit: 23129 270 80mm +3mm 56-K103.80.CKW Uses Vertex Piston Kit: 23129 270 80mm +3mm 56-K103.80.CKW Uses Vertex Piston Kit: 23129 270 80mm +3mm 56-K170.80.CKW Uses Vertex Piston Kit: 23943 270 80mm +3mm 56-K170.80.CKW Uses Vertex Piston Kit: 23943 270 80mm +3mm 56-K250.80.CKW Uses Vertex Piston Kit: 270 80mm +3mm 56-K170.80.CKW Uses Vertex Piston Kit: 23943 270 80mm +3mm 56-K170.80.CKW Uses Vertex Piston Kit: 23943 270 80mm +3mm 56-K250.80.CKW Uses Vertex Piston Kit: 480 98mm +3mm 56-K114.98.CKW Uses Vertex Piston Kit: 23404 480 98mm +3mm 56-K108.98.CKW Uses Vertex Piston Kit: 23404 470 99mm +2mm 56-K165.099.CKW Uses Vertex Piston Kit: 23655 470 99mm +2mm 56-K198.99.CKW Uses Vertex Piston Kit: 24369 470 99mm +2mm 56-K251.99.CKW Uses Vertex Piston Kit: 24461 480 98mm +3mm 56-K114.98.CKW Uses Vertex Piston Kit: 23404 480 98mm +3mm 56-K108.98.CKW Uses Vertex Piston Kit: 23404 470 99mm +2mm 56-K138.099.CKW Uses Vertex Piston Kit: 23655 470 99mm +2mm 56-K165.099.CKW Uses Vertex Piston Kit: 23655 470 99mm +2mm 56-K198.99.CKW Uses Vertex Piston Kit: 24369 470 99mm +2mm 56-K251.99.CKW Uses Vertex Piston Kit: 24461 470 99mm +2mm 56-K198.99.CKW Uses Vertex Piston Kit: 24369 470 99mm +2mm 56-K251.99.CKW Uses Vertex Piston Kit: 24461
20002-K01**
WR 250F
2001 - 04 250 77mm 56-K103.77.CW 250 77mm
20002-K02**
WR 250F
2005 - 13 250 77mm 56-K103.77.CW 250 77mm
20010-K01**
WR 250F
2015 - 17 250 77mm 56-K170.77.CW 250 77mm
20010-K02**
WR 250F
2018 - 19 250 77mm 56-K170.77.CW 250 77mm
WR 250F
2020 - 24 250 77mm 56-K250.77.CYW 250 77mm 56-K250.77.CKW
2025 - 26
WR 250F
250 77mm 56-K250.77.CYW
20002-K01**
YZ 250F
2001 - 04 250 77mm 56-K103.77.CW 250 77mm
20002-K02**
YZ 250F
2005 - 07 250 77mm 56-K103.77.CW 250 77mm
20002-K03**
YZ 250F
2008 - 13 250 77mm 56-K103.77.CW 250 77mm
20010-K01**
YZ 250F
2014 - 15 250 77mm 56-K170.77.CW 250 77mm
20010-K02**
YZ 250F
2016 - 18 250 77mm 56-K170.77.CW 250 77mm
YZ 250F
2019 - 24 250 77mm 56-K250.77.CYW 250 77mm 56-K250.77.CKW
2025 - 26
YZ 250F
250 77mm 56-K250.77.CYW
20010-K01**
YZ 250FX
2015 - 16 250 77mm 56-K170.77.CW 250 77mm
20010-K02**
YZ 250FX
2017 - 19 250 77mm 56-K170.77.CW 250 77mm
YZ 250FX
2020 - 24 250 77mm 56-K250.77.CYW 250 77mm 56-K250.77.CKW
2025 - 26
YZ 250FX
250 77mm 56-K250.77.CYW
20001-K02**
WR 450F
2003 - 06 450 95mm 56-K114.95.CW 450 95mm
20003-K01**
WR 450F
2007 - 15 450 95mm 56-K108.95.CW 450 95mm
20005-K02**
WR 450F
2016 - 18 450 97mm 56-K165.097.CW 450 97mm
WR 450F
2019 - 20 450 97mm 56-K198.97.CYW 450 97mm 56-K198.97.CKW
WR 450F
2021 - 23 450 97mm 56-K251.97.CYW 450 97mm 56-K251.97.CKW
20001-K02**
YZ 450F
2003 - 05 450 95mm 56-K114.95.CW 450 95mm
20003-K01**
YZ 450F
2006 - 09 450 95mm 56-K108.95.CW 450 95mm
20005-K01**
YZ 450F
2010 - 13 450 97mm 56-K165.097.CW 450 97mm
20005-K02**
YZ 450F
2014 - 17 450 97mm 56-K165.097.CW 450 97mm
YZ 450F
2018 - 19 450 97mm 56-K198.97.CYW 450 97mm 56-K198.97.CKW
YZ 450F
2020 - 22 450 97mm 56-K251.97.CYW 450 97mm 56-K251.97.CKW
YZ 450FX
2019 - 20 450 97mm 56-K198.97.CYW 450 97mm 56-K198.97.CKW
YZ 450FX
2021 - 23 450 97mm 56-K251.97.CYW 450 97mm 56-K251.97.CKW
**Please note these items are By Order Only
*Please visit our website for current prices E110
www.oro2u.com
Tel: 01597 822 666
Fax: 01597 825 224
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