ORO2U Dirt Catalogue - Section E - Engine and Performance.

Vertex

Piston Kits

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. When it comes to power and perforance, VERTEX pistons are hard to beat. Forged to the highest quality 2618 aluminium alloy. To aid in the break-in process, and reduce wear, VERTEX pistons utilizes a unique Molybdenum Disulphide (MOS2) coating on the piston skirt.

KTM Models - 4 Stroke

Piston Type Years Size

Piston Kit

Piston Rings

Piston Pin

Piston Clips

Small End Bearing

EXC 450F Std. Comp. 11.0:1 EXC 450F High Comp. 12.0:1 EXC 450F Std. Comp. 11.8:1 EXC 450F High Comp. 12.3:1 EXC 450F Std. Comp. 11.8:1 EXC 450F High Comp. 12.8:1 EXC 450R Std. Comp. 11.9:1 EXC 450R High Comp. 12.8:1

2003 - 07 89mm 2003 - 07 89mm 2012 - 16 95mm 2012 - 16 95mm 2017 - 26 95mm 2017 - 26 95mm 2008 - 11 95mm 2008 - 11 95mm 2008 - 11 102mm 2003 - 06 95mm 2003 - 06 95mm 2003 - 06 97mm 2007 - 12 97mm 2007 - 12 97mm 2013 - 15 95mm 2013 - 15 95mm

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

715108 715108 715436 715436 715471 715471 715400 715400 715400 711140 711140 711140 715400 715400 715436 715436 715436 711197 711197 711197

- - - - - - - - - - - - - - - - - - - - - - - - - - - - -

23329A 23340A 23859A 23860A 24209A 24211A 23379A 23380A

56-R9315 56-R9315 56-R9402 56-R9402 56-R9402 56-R9402 56-R9402 56-R9402 56-R9400

72073 72099 72099 72099 72099 72099 72099 72099 72090 72075 72075 72075 72090 72090 72099 72099 72075 72075 72099 72099 72099 72099 72090 72090 72075 72075 72090 72090 72090

EXC 450R Std. Comp 11.9:1 (Big Bore XL)

23368700

SX 450F Std. Comp. 12.0:1 SX 450F High Comp. 13.0:1

.V .V

22941A 22968A

56-R915 56-R915

SX 450F Std. Comp. 12.0:1 (Big Bore) SX 450F Std. Comp. 12.5:1 SX 450F High Comp. 13.2:1 SX 450F Std. Comp. 12.6:1 SX 450F High Comp. 13.2:1 SX 450F High Comp. 13.5:1 SX 450F Std. Comp. 12.6:1 SX 450F High Comp. 13.6:1 SX 450F High Comp. 13.3:1 SX 450F Std. Comp. 13.1:1 SX 450F High Comp. 13.7:1 EXC 500 Std. Comp. 11.8:1 SX-F 505 High Comp. 13.5:1 SX-EXC 520 Std. Comp, 11.0:1 SX-EXC 525 Std. Comp. 11.0:1 EXC 530R Std. Comp. 11.9:1 EXC 530R High Comp. 12.7:1

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

22957200

56-R9318 56-R9430 56-R9430 56-R9402 56-R9402 56-R9402 56-R9402 56-R9402 56-R9402

23342A 23343A 23849A 23850A 23871A 24099A 24112A 24113A 24618A 24635A 23762A 23417A 22942A 22942A 23381A 23382A

GP Racer Choice 2013 - 15 95mm

2016 - 22 95mm 2016 - 22 95mm

GP Racer Choice 2016 - 22 95mm

2023 - 26 95mm 2023 - 26 95mm 2012 - 23 95mm 2008 - 09 100mm 2000 - 02 95mm 2003 - 07 95mm 2008 - 11 95mm 2008 - 11 95mm 2008 - 11 102mm

590295000004 715471 590295000004 711241

.V .V

711197 711174 711140 711140 715400 715400 715400

56-R9402 56-R9316

.V .V

56-R915 56-R915

.V .V .V

56-R9402 56-R9402 56-R9400

EXC 530R Std. Comp. 11.9:1 (Big Bore XL)

23369700

RIEJU Models - 2 Stroke

Piston Type Years Size

Piston Kit

Piston Rings

Piston Pin

Piston Clips

Small End Bearing

MR 250 MR 300

2021 2021

66.4mm

.VER 715372

.EACH .EACH

23249A 23761A

56-R9311 56-R9312

72074 72074

72mm

.V

715372

SHERCO Models - 2 Stroke

Piston Type Years Size

Piston Kit

Piston Rings

Piston Pin

Piston Clips

Small End Bearing

2018 - 26 54mm 2017 - 26 66.4mm 2016 - 26 72mm

SE 125R SE 250R SE 300R Trial 125 Trial 200 Trial 250 Trail 290

24660A 24621A 24622A 22623A 22624A 22674A 22625A

.VER 71161

.EACH .EACH

56-R9311 56-R9312 56-R9405

72058 72058 72060 72047 72074 72074

.VER 71161

56mm 64mm

.V

715242 715258 711125 711125

.V

56-R908

72.8mm

.V .V

56-R9455 56-R9032

76mm

* 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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