ORO2U Dirt Catalogue - Section E - Engine and Performance.

Piston Kits

Vertex

Vertex Piston Kits - 2 Stroke As the OE supplier of 2-stroke pistons to KTM, Vertex pistons has an outstanding reputation for quality and performance. Each gravity 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. Vertex Piston Kits - 4 Stroke When it comes to power and performance, Vertex 4 stroke pistons are hard to beat. Forged to the highest quality 2618 aluminium alloy, Vertex pistons are perfectly suited to handle the rigors and high pressures of todays modern 4-stroke engines. To aid in the break-in process, and reduce wear, Vertex pistons utilizes a unique Molybdenum Disulphide (MOS2) coating on the piston skirt.

BETA Models - 2 Stroke RK6 Enduro-K50-ST50

Piston Type

Years

Size

Piston Kit

Piston Rings 56-R9030.V 56-R9030.V 56-R9307.V 56-R9311.V 56-R9311.V 56-R9312.V 56-R9312.V 56-R9031.V 56-R9032.V 53010006640 53010006640 53010007300 56-R9312.V 56-R9312.V 53010007300

Piston Pin

Piston Clips

Small End Bearing

1995 - 97 39.5mm 22171A 1998 - 02 39.5mm 22525AB 2018 - 23 54mm 56-W8813.A.V

715036 715036 711127

72065 72025 72071 72047 72047 72047 72047 72047 72047 72047 72047 72047 72047 72047 72047

RK6 Enduro

RR 125 RR 200 RR 250 RR 250 RR 300 RR 300

56-800.VERTEX 56-844.VERTEX 56-8020.VERTEX 56-8020.VERTEX 56-8020.VERTEX 56-8020.VERTEX

2019 - 23 62mm 24521A 2013 - 17 66.4mm 24390A 2018 - 23 66.4mm 24384A 2013 - 17 72mm 24391A 2018 - 21 72mm 24385A 1995 - 97 72.5mm 22176A

56-7924.V 56-7924.V 56-7924.V 56-7924.V

Tecno-ALP Trial Zero 270 Trial Xtrainer 250 2T Xtrainer 250 2T

711125 711125 715372 715372 715372 715372 715372 715372

76mm 22436A 66.4mm 24390A

2017

2018 - 23 66.4mm 24384A 2022 - 23 73mm 24569A 2015 - 17 72mm 24391A 2018 - 21 72mm 24385A 2022 - 23 73mm 24569A

56-8020.VERTEX 56-8020.VERTEX

RR 300 2T

Xtrainer 300 2T Xtrainer 300 2T Xtrainer 300 2T

56-8020.VERTEX

Models - 4 Stroke

Years Size

Piston Kit

Piston Rings Piston Pin 56-R9303.5400 715262

Piston Clips

Small End Bearing

RR 125-RE-ALP Motard-Urban

2006 - 12 54mm 23349 2005 - 07 75mm 22978A 2005 - 07 75mm 22980A 2005 - 07 77mm 22979200 2016 - 23 88mm 24386A 2016 - 23 88mm 24387A 2015 - 23 95mm 24388A 2005 - 09 89mm 23329A 2005 - 09 89mm 23340A 2015 - 23 100mm 24389A 2005 - 09 95mm 22942A 2005 - 09 95mm 22969A 2005 - 08 97mm 22958200 2005 - 08 98mm 22958300

72049 72075 72075 72075 72098 72098 72099 72075 72075 72099 72075 72075 72075 72075

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

56-R9309.V 56-R9309.V 56-R917.V 56-R9313.V 56-R9313.V 56-R9314.V 56-R9315.V 56-R9315.V 56-R9316.V 56-R915.V 56-R915.V 56-R9318.V 56-R9319.V

711140 711140 711140 715431 715431 715436 715108 715108 415436 711140 711140 711140 711140

RR 250 Std Comp. RR 250 Hi Comp. RR 250 Big Bore.

RR 350 RR 390 RR 430

RR 450 Std Comp. 11.0:1 RR 450 Hi Comp. 12.0:1

RR 480

RR 525 Std Comp. 11.0:1 RR 525 Hi Comp. 12.0:1

RR 525 Std Comp. 11.0:1 (Big Bore) RR 525 Std Comp. 11.0:1 (Big Bore XL)

CAGIVA Models - 2 Stroke

Piston Type

Years

Size

Piston Kit

Piston Rings

Piston Pin

Piston Clips

Small End Bearing

Cross 125 Cross 125 Cross 250

1984 - 88 1988 - 91

56mm 56mm

21600A 21889A

56-R902.V 56-R902.V 56-R912.V

711121 711121 711125

72027 72027 72048

1985 - 91 70mm 21757AB

COBRA Models - 2 Stroke

Piston Type

Years

Size

Piston Kit

Piston Rings

Piston Pin

Piston Clips

Small End Bearing

CX 50SR

2006 - 17 39mm 24105A 2007 - 09 44.5mm 24107AB 2010 - 11 43mm 24106AB 2012 - 16 44.5mm 24107AB

CX 65 CX 65 CX 65

*Please visit our website for current prices

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

www.oro2u.com

Tel: 01597 822 666

Fax: 01597 825 224

E44

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