ORO2U ATV Catalogue - Section E - Engine and Performance

Namura

Piston Kits

Namura Piston Kits W hy replace your cylinder when you can replace the piston for a fraction of the cost and time? Namura offers direct replacements for the original equipment as well as hi-compression and a variety of oversizes to meet your ride’s needs. They are available in 0.25mm increments, from the -1 (0.25mm)

through the -8 (2mm) oversize. We also carry B (0.01mm) and C (0.02mm) oversizes which help extend the life of your expensive coated cylinders; a selection of big bore piston kits is available for some applications. Combine this with the MOS2 coating and hard anodizing, Namura gives you a higher performance piston without the higher price. N amura piston kits come with the piston individually wrapped; a set of OEM quality rings packed in their own box, a wrist pin, and circlips.

POLARIS Models

Years

Size

Piston Kit

Oem Ref

Piston Rings

Small End Bearing

300 Hawkeye 2x4 300 Sportsman 4x4 300 Xplorer / Xpress

2006 - 11 77.7mm 2008 - 10 77.7mm 1996 - 99 74.5mm

56-W9758.000.NT 56-W9758.000.NT

– –

56-W164.NT

3085099

56-R746 56-R765 56-R766 56-R766 56-R766 56-R747 56-R748

56-809.SI

325 Trailboss / Magnum / Xpedition

2000 - 02 78mm 56-W263+000 2004 - 05 78.45mm 56-W264+000 2003 - 13 78.45mm 56-W264+000 2003 - 06 78.45mm 56-W264+000

– – – –

330 ATP 4x4

330 Trail Blazer / Boss 330 Magnum 2x4 / 4x4

350L Trail Boss 2x4 / 4x4 / 6x6 400L 2x4 / 4x4 Sport / 6x6

1990 - 94 80mm 1994 - 03 83mm

56-W165.NT 56-W166.NT

3084161 3084734

56-817.SI 56-817.SI

400 Hawkeye HO 2x4

2011 - 14 87.9mm 56-W962.000 2003 - 05 87.9mm 56-W962.000 2010 - 14 87.9mm 56-W962.000

– – –

400 Ranger 2x4 400 Ranger 4x4 400 Scrambler 400 Sportsman

1995 - 02 83mm

56-W166.NT

3084734

56-R748

56-817.SI

2001 - 05 87.9mm 56-W962.000 2008 - 14 87.9mm 56-W962.000

– –

400 Sportsman HO

400 Trail Blazer

1994 - 03 83mm 1993 - 02 83mm

56-W166.NT 56-W166.NT 56-W9992.NT

3084734 3084734

56-R748 56-R748

56-817.SI 56-817.SI

400 Xplorer / Sport

450 Farmhand

2017 2016

92.95mm

– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

450 HO 2x4

99mm

56-W4981.000.NT

450 Sportsman

2006 - 07 87.9mm 56-W962.000

450 Sportsman (All)

2016 - 17 99mm 2017 - 23 92.95mm 2017 - 19 92.95mm 2004 - 05 92mm 1998 - 00 92mm 1999 - 02 92mm 1999 - 13 92mm 2017 - 22 92.95mm 1996 - 03 92mm 1996 - 13 92mm

56-W4981.000.NT

450 Sportsman HD / HO

56-W9992.NT 56-W9992.NT

500 Ace

500 ATP H.O.

56-W4677+000.NT 56-W4677+000.NT 56-W4677+000.NT 56-W4677+000.NT

3085377 3085377

56-R749 56-R749 56-R749 56-R749 56-R749 56-R749 56-R749 56-R750 56-R750

500 Big Boss 6x6

500 Magnum RMK 4x4 500 Ranger 2x4 / 4x4

3085377

500 Ranger

56-W9992.NT

500 Xplorer / Magnum

56-W4677+000.NT 56-W4677+000.NT 56-W4677+000.NT

3085377 3085377 3085377

500 Sportsman / Scrambler 500 Sportsman Forest Tractor

2014

92mm

500L Outlaw 500L Predator 550 Sportsman

2006 - 07 99.20mm 2003 - 07 99.20mm 2009 - 14 96.6mm 2015 - 19 99mm 2012 - 23 99mm 2014 - 23 99mm 2014 - 23 99mm 2017 - 22 99mm 2005 - 09 80mm 2002 - 08 80mm 2007 - 08 80mm

56-W4807.NT 56-W4807.NT

3087970

56-W095.000.NT 56-W4981.000.NT 56-W4981.000.NT 56-W4981.000.NT 56-W4981.000.NT 56-W4981.000.NT 56-W9770.A.NT** 56-W9770.A.NT** 56-W9770.A.NT** 56-W9771.A.NT** 56-W9771.A.NT** 56-W9771.A.NT** 56-W9771.A.NT** 56-W9771.A.NT** 56-W9700.A.NT** 56-W9771.A.NT** 56-W9700.A.NT** 56-W9700.A.NT** 56-W9700.A.NT** 56-W9771.A.NT** 56-W9771.A.NT**

570 ACE EFI (UTV) 570 RZR EFI (UTV) 570 Ranger All (UTV) 570 Sportsman (All) 570 Sportsman 6x6 700 Ranger 4x4 / 6x6

700 Sportsman (EFI & Carb)

700 Sportsman X2 EFI

800 Ranger All 800 Ranger EFI

2010

80mm

2011 - 14 80mm 2013 - 14 80mm 2011 - 14 80mm 2011 - 16 80mm 2010 - 14 80mm 2008 - 10 80mm 2011 - 14 80mm

800 Ranger EFI Midsize

800 Ranger Crew 800 Ranger 6x6

800 RZR 4

800 RZR EFI

800 RZR EFI / EPS

800 RZR S 800 RZR S

2009

80mm

2011 - 14 80mm 2005 - 14 80mm 2012 - 14 80mm

800 Sportsman EFI

800 Sportsman EFI Forest **2 Pistons required per vehicle

*Please visit our website for current prices

E-mail: sales@oro2u.com

www.oro2u.com

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