ORO2U Dirt Catalogue - Section E - Engine and Performance.

Piston Kits

Vertex

GASGAS Models - 2 Stroke

Piston Type

Years

Size

Piston Kit

Piston Rings 56-R9403.V 56-R9404.V 56-R9404.V 56-R9339.V 56-R9339.V 53008004700 56-R9339.V 56-R9332.V 56-R9307.V 56-R9331.V 56507805400 56-R9307.V 56-R9307.V 56-R9307.V 56-R9331.V 56-R908.V 56-R9311.V 56-R9399.V 56-R9502.V 56-R9312.V 56-R9312.V Piston Rings 56-R9406.V 56-R9406.V 56-R9406.V 56-R9406.V 56-R9406.V 56-R9406.V 56-R9361.V 56-R9401.V 56-R9401.V 56-R9407.V 56-R9401.V 56-R9401.V 56-R9407.V 56-R9402.V 56-R9402.V 56-R9402.V 56-R9334.V

Piston Pin

Piston Clips 72065.EACH 72065.EACH 72065.EACH 72050.EACH

Small End Bearing 56-838.VERTEX 56-827.VERTEX 56-827.VERTEX 56-7997.VERTEX 56-7997.VERTEX 56-7997.VERTEX 56-7997.VERTEX 56-800.VERTEX 56-800.VERTEX 56-800.VERTEX 56-800.VERTEX 56-800.VERTEX 56-800.VERTEX

2021 - 23 39.5mm 23429AB 2021 - 23 45mm 23430AB

MC 50 MC 65 MC 65 MC 85

715036 715332 715332 715378 715378 711119 715378 711127 711127 711127 711127 711127 711127 711127 715130 715258

Race Evolution 2021 - 23 45mm 24447AB

2021 - 23 47mm 24212A 2021 - 23 47mm 24279A

Race

72050 72050 72050 72071 72071 72071 72071 72071 72071 72071 72055 72058 72074

MC 85 FlatHead

Race Evolution 2021 - 23 47mm 24446A

MC 85 single ring 0,8

2021 - 23 47mm 24355A 2003 - 10 54mm 23195A 2021 - 23 54mm 23928A 2021 - 23 54mm 24243A

Race

MC 85 12⁰ Head

EC / MX 125 - Halley - SM

MC 125 Twin Ring MC 125 Single Ring MC 125 Single Ring 0,8

Race

Race Evolution 2021 - 23 54mm 24445A

2021 - 23 54mm 24427A 2021 - 23 54mm 24520A 2021 - 23 54mm 24419A 2002 - 21 54mm 22766A

Race Race

MC 125 12⁰ Head Single Ring MC 125 12⁰ Head Twin Ring

Pro Race

MC 125 Single Ring

TXT 125 TXT 200 EC 250 EC 250 MC 250 EC 300 EC 300

2002

64mm 22767A

2002 - 19 66.4mm 23249A 2021 - 23 66.4mm 23630A 2022 - 23 66.4mm 23630A 2002 - 19 72mm 23761A 2021 - 23 72mm 24244A

56-7924.V 56-7924.V

72048.Each 72048.Each

56-8020.VERTEX 56-8020.VERTEX

715372

56-7924.V 56-7924.V

72074

72048.Each

56-8020.VERTEX

Models - 4 Stroke EC 250F Comp. 12.8:1

Piston Type

Years

Size

Piston Kit

Piston Pin

Piston Clips 72106.Each 72106.Each 72106.Each 72106.Each 72106.Each 72106.Each 72106.Each 72098.Each 72098.Each 72098.Each 72098.Each 72098.Each 72098.Each 72099.Each 72099.Each 72099.Each

Small End Bearing

2021 - 23 78mm 24196A 2021 - 23 78mm 24114A

715441 715441 711195 715441 715441 715441 715441 715431 715431 715431 715431 715431 715431 711197 711197 711197 711140

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

EC 250F High Comp. 13.5:1 EC 250F High Comp. 13.5:1

GP Racer Choice 2021 - 23 78mm 24115A

2021 - 23 78mm 24097A 2021 - 23 78mm 24114A

MC 250F Comp. 14.4:1

MC 250F High Comp. 14.7:1 MC 250F High Comp. 14.5:1 MC 250F Comp. 14.4:1 (Big Bore)

GP Racer Choice 2021 - 23 78mm 24115A

2021 - 23 78mm 24142A 2021 - 23 88mm 24098A 2021 - 23 88mm 24116A 2021 - 23 90mm 24238A 2022 - 23 88mm 24098A 2022 - 23 88mm 24116A 2022 - 23 90mm 24238A 2021 - 23 95mm 24099A 2021 - 23 95mm 24112A

EC 350F Comp. 14.0:1

EC 350F High Comp. 15.1:1 EC 350F Comp. 14.0:1 (Big Bore)

MC 350F Comp. 14.0:1

MC 350F High Comp. 15.1:1 MC 350F Comp. 14.0:1 (Big Bore)

MC 450F Comp. 12.6:1

EC 450F High Comp. 13.6:1 EC 450F High Comp. 13.3:1

GP Racer Choice 2021 - 23 95mm 24113A

FSE 450

2003 - 04 95mm 22953A

72075

HM MOTO Models - 2 Stroke

Piston Type

Years

Size

Piston Kit

Piston Rings 56-R9335.V

Piston Pin

Piston Clips

Small End Bearing

CRE 50 CRE 260

1995 - 04 40.3mm 22088A 1989 - 00 68mm 22227A

715038

72025 72074

56-R911.V

56-7924.V

Models - 4 Stroke

Piston Kit

Piston Rings Piston Pin

Piston Clips

Piston Type

Years

Size

CRM 125 Derapage Liquid Cooled Std. Comp. 14.1:1 CRF 125Z-CRE 125RR - Locusta Liquid Cooled High Comp. 16.1:1

52mm 23935A

56-R9329.V

715029

72050

52mm 23516A

56-R9329.V

715029

72050

*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

E45a

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