Piston Kits
Namura
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.
HONDA 2-Stroke
Piston Type
Years
Size
Piston Kit
Oem Ref
Piston Rings
Small End Bearing
CR 80 CR 85 CR 125 CR 125
1986 - 02 47mm 56-W643.A.NT
13120-GBF-840
56-R703 56-R702 56-R714 56-R704
56-821.SI 56-821.SI 56-814.SI 56-814.SI 56-801.SI 56-801.SI 56-801.SI 56-801.SI
2003 - 07 47.5mm 56-W643.P2A.NT 13120-GBF-B00
1992 - 03 54mm 56-W676.NT 2004 - 07 54mm 56-W859.NT 1986 - 96 54mm 56-W906+00A.NT 1986 - 96 66.4mm 56-W614.A.NT 1997 - 01 66.4mm 56-W702.A.NT 2002 - 04 66.4mm 56-W801+00A.NT 2005 - 07 66.4mm 56-W860+00A.NT
13110-KZ4-A90 13110-KSR-A00
CRM 125
–
56-R770.NT
–
CR 250 CR 250 CR 250 CR 250
13100-KS7-000 13102-KZ3-L10 13101-KZ3-L20
56-R701 56-R700 56-R700 56-R726
–
4-Stroke
Piston Type
Years
Size
Piston Kit
Oem Ref
Piston Rings
Small End Bearing
Z 50R Comp. 10.0:1 XR 50R Comp. 10.0:1 CRF 50F Comp. 10.0:1
1979 - 99 39mm 56-W4798+000.NT 2000 - 03 39mm 56-W4798+000.NT 2004 - 16 39mm 56-W4798+000.NT 2004 - 12 47mm 56-W052.000.NT 1997 - 03 47mm 56-W052.000.NT 1980 - 84 65.5mm 56-W4156.000.NT 1981 - 02 65.5mm 56-W4156.000.NT 2003 - 19 65.5mm 56-W4816+000.NM 2008 - 09 65.5mm 56-W4816+000.NM
– – – – – – – – – – – – – – – – –
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
CRF 70F XR 70R
XR 200
XR 200R CRF 230F
CRF 230L,M
XL250
70mm 56-W0072.7000 ***
XR250 XR250L XR250R
1987 - 04 73mm 56-W4466 *** 2019 - 24 71mm 56-W8828.NT 2004 - 09 78mm 56-W4830+00A.NF * 2010 - 13 76.8mm 56-W950.A.NT 2010 - 13 76.8mm 56-W950.A.NF 2014 - 15 76.8mm 56-W958.A.NT 2014 - 15 76.8mm 56-W958.A.NF 2016 - 17 76.8mm 56-W8800.00A.NF 2018 - 19 79mm 56-W8806.A.NF 2020 - 24 78mm 56-W4788.A.NF
CRF 250F
CRF 250R Comp. 13.2:1 CRF 250R Comp. 13.2:1
N Forged
56-R7703.NT 56-R7704.NT 56-R7704.NT 56-R7704.NT 56-R7704.NT 56-R7704.NT
Hyperdryve
Comp. 13.2:1
N Forged
CRF 250R Comp. 13.2:1
Hyperdryve
Comp. 13.2:1
N Forged N Forged N Forged N Forged N Forged N Forged N Forged
CRF 250R Comp. 13.5:1 CRF 250R Comp 13.5.1 CRF 250R Comp. 13.5.1 CRF 250RX Comp. 13.5.1
–
2019
79mm 56-W8806.A.NF
2020 - 24 78mm 56-W4788.A.NF 2004 - 17 78mm 56-W4830+00A.NF * 1996 - 04 85mm 56-W4628.A.NT 1996 - 04 89mm 56-K111_P 2002 - 08 96mm 56-W4820.A.NT 2002 - 08 96mm 56-W4820.A.NT.F 2009 - 12 96mm 56-W4978.A.NT ** 2009 - 12 96mm 56-W4978.A.NT.F ** 2013 - 16 96mm 56-W916.A.NT 2013 - 16 96mm 56-W916.A.NT.F 2017 - 24 96mm 56-W9949.A.NT.F 2017 - 24 96mm 56-W9949.A.NT.F 2005 - 17 96mm 56-W4820.A.NT.F
CRF 250RX
– –
CRF 250X Comp. 13.2:1
56-R7703.NT
XR 400R
13101-KCY-670
56-R719
Big Bore 11.1 High Comp.
– – – – – – – – – –
56-K111_R
CRF 450R Comp. 12.0:1
Hyperdryve
56-R7705.NT 56-R7705.NT 56-R7705.NT 56-R7705.NT 56-R7705.NT 56-R7705.NT
Comp. 12.0:1
N Forged
CRF 450R Comp. 12.0:1
Hyperdryve
Comp. 12.0:1
N Forged
CRF 450R Comp. 12.0:1
Hyperdryve
Comp. 12.0:1
N Forged N Forged N Forged N Forged
CRF 450R Comp. 13.5:1 CRF 450RX Comp. 13.5:1 CRF 450X Comp. 12.0:1
– –
56-R7705.NT
* Will not accept oem rings from 2006-07 CRF250R or 2007-09 CRF250X models ** Will not accept oem rings or circlips *** Please Note; Piston brand for particular item is not Namura
*Please visit our website for current prices E38b
www.oro2u.com
Tel: 01597 822 666
Fax: 01597 825 224
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