ORO2U Dirt Catalogue - Section E - Engine and Performance.

Piston Kits

Vertex

Vertex Piston Kits VERTEX pistons have an outstanding reputation for quality and performance. Each gravtiy cast piston is created with only premium aluminium alloys utilizing an 12-21% silicon content. The silicon content in VERTEX pistons is crucial to the quality of the piston - it’s critical in decreasing thermal expansion which, when an

engine reaches normal operating temperatures, can change the geometry of the piston. Controlling this expansion means VERTEX pistons can be run at tighter tolerances for more power, less noise and a longer lifespan of the piston.

KAWASAKI Models - 4 Stroke KX 250F - KXE 250F Std. Comp. 12.6:1 KX 250F - KXE 250F High Comp. 13.3:1

Piston Type Years Size

Piston Kit

Piston Rings Piston Pin

Piston Clips

2004 - 05 77mm 2004 - 06 77mm

.V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V .V

715380 715380 715380 715380 715380 715380 715380 715380 715380 715380 715380 715380 715380 715380 711195 715380 711229 711229 711195 711229 711229 711229 711195 711229 711195 711195 711195

22982A 23114A

56-R9414 56-R9414 56-R9359 56-R9360 56-R9367 56-R9362 56-R9414 56-R9414 56-R9414 56-R9414 56-R9414 56-R9360 56-R9414 56-R9414 56-R9414 56-R9360 56-R9414 56-R9414 56-R9414 56-R9360 56-R9414 56-R9414 56-R9414 56-R9360 56-R9406 56-R9406 56-R9406 56-R9361 56-R9406 56-R9406

72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72055 72075 72075 72075 72075 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090 72090

KX 250F - KXE 250F Std. Comp. 12.6:1 (Big Bore) KX 250F - KXE 250F High Comp. 12.6:1 (Big Bore) KX 250F - KXE 250F Std. Comp. 12.6:1 (Big Bore XL) KX 250F - KXE 250F Std. Comp. 12.6:1 (Big Bore XXL)

2004 - 09 79mm 22982200

2004 - 09 80mm 2004 - 09 83mm 2004 - 09 84mm 2006 - 08 77mm

23405A

23245600 23231700

KX 250F - KXE 250F Std. Comp. 13.5:1 KX 250F - KXE 250F Std. Comp. 13.2:1 KX 250F - KXE 250F High Comp. 13.9:1 KX 250F - KXE 250F Std. Comp. 13.2:1 KX 250F - KXE 250F High Comp. 13.9:1

23259A 23259A 23458A 23566A 23567A 23680A 23646A 23647A 23732A 23654A 24020A 24021A 24023A 24032A 24267A 24268A 24269A 24237A 24456A 24457A 24458A 24637A 24509A 24515A 24628A 24629A 24716A 22951A 23550A

2009

77mm

2008 - 09 77mm

2010 2010 2010

77mm 77mm 80mm

KX 250F - KXE 250F Std. Comp. 13.2:1 (Big Bore)

KX 250F - KXE 250F Std. Comp. 13.5:1 KX 250F - KXE 250F High Comp. 14.2:1 KX 250F - KXE 250F Hi- Comp. 14.5:1

2011 - 14 77mm 2011 - 14 77mm

GP Racer Choice 2011 - 14 77mm

KX 250F - KXE 250F Std. Comp. 13.5:1 (Big Bore)

2011 - 14 80mm 2015 - 16 77mm 2015 - 16 77mm

KX 250F - KXE 250F Std. Comp. 13.8:1 KX 250F - KXE 250F High Comp. 14.3:1 KX 250F - KXE 250F Hi Comp. 14.8:1

.EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH .EACH

GP Racer Choice 2015 - 16 77mm

KX 250F - KXE 250F Std. Comp. 13.8:1 (Big Bore)

2015 - 16 80mm 2017 - 19 77mm 2017 - 19 77mm

KX 250F Std. Comp. 13.4:1 KX 250F High Comp. 14.3:1 KX 250F High Comp. 13.9:1

GP Racer Choice 2017 - 19 77mm

KX 250F Std. Comp. 13.4:1 (Big Bore)

2017 - 19 80mm

2020 2020

78mm 78mm 78mm

KX 250F Std. Comp. 14.2:1

KX 250F High. Comp. KX 250F High. Comp. KX 250F (Big Bore)

GP Racer Choice 2020

2020 - 24 81mm 2021 - 22 78mm 2021 - 22 78mm 2023 - 24 78mm

. VERTEX 711195

.V .V

715441 715441

KX 250 Std. Comp. 14.1:1 KX 250 High. Comp. 15.05:1 KX 250 Std. Comp. 14.1:1

590278000005 715441 590278000005 715441 590278000004 715441

GP Racer Choice 2023 - 24 78mm

KX 250 High Comp.

2025 - 26 78mm 2003 - 04 90mm 2003 - 04 90mm 2003 - 04 91mm 2003 - 04 92mm 2008 - 10 96mm 2006 - 10 96mm 2006 - 08 96mm 2006 - 08 96mm 2009 - 12 96mm 2009 - 12 96mm

KX 250 / X

KLX 400 Std. Comp. 12.2:1 KLX 400 High Comp. 13.5:1

.V .V .V .V

711140 711140 711140 711140 711144 711144 711144 711144 711144 711144 711197 715379 715379 711197 715379 715379 711208 715379 715379 715379 711197 715471 711241 711241

56-R9415 56-R9415 56-R9416 56-R9417

KLX 400 (Big Bore) KLX 400 (Big Bore XL)

22973100 22973200

KLX 450R Std. Comp. 12.0:1 KLX 450R High Comp. 13.0:1

.V .V

23242A 23243A 23242A 23243A 23445A 23446A 23733A 23857A 23858A 23874A 24018A 24019A 24022A 24031A 23857A 23858A 23874A 24368A 24376A 24377A 24698A

56-R918 56-R918

KX 450F - KXE 450F Std. Comp. 12.0:1 KX 450F - KXE 450F High Comp. 12.0:1

.V .V

56-R918 56-R918

KX 450F Std. Comp. 12.7:1 KX 450F High Comp. 13.2:1 KX 450F High Comp. 13.8:1 KX 450F Std. Comp. 12.5:1 KX 450F High Comp. 13.6:1 KX 450F High Comp. 13.8:1 KX 450F Std. Comp. 12.5:1 KX 450F High Comp. 13.0:1 KX 450F High Comp. 13.5:1

.V .V

56-R918 56-R918

GP Racer Choice 2009 - 12 96mm

.V .V

56-R918 56-R918

2013 - 14 96mm 2013 - 14 96mm 2013 - 14 96mm

.V

56-R918

.V

56-R918

2015 2015

96mm 96mm 96mm

.V .V .V .V .V

56-R9376 56-R9376 56-R9376 56-R9374 56-R9376

GP Racer Choice 2015

KX 450F Std. Comp. 12.5:1 (Big Bore)

2009 - 15 98mm 2016 - 18 96mm 2016 - 18 96mm

KX 450F Std. Comp. 12.8:1 KX 450F High Comp. 13.9:1 KX 450F High Comp. 14.1:1 KX 450 Std. Comp. 12.5:1 KX 450 High Comp. 13.5:1 KX 450 High Comp. 13.0:1

.V .V

56-R918 56-R918

GP Racer Choice 2016 - 18 96mm

2019 - 23 96mm 2019 - 23 96mm

.V .V .V .V

56-R9376 56-R9376 56-R9376 56-R9376

GP Racer Choice 2019 - 23 96mm

2024 - 26 96mm

KX 450 / X

* Note; Most Kits are available from standard size up to +2.00mm over size *

*Please visit our website for current prices

E-mail: sales@oro2u.com

www.oro2u.com

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