Piston Kits
Namura
MOS2 (Teflon/Molybdenum) Coated Skirts A rolled-on application process provides a bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction, and helping to eliminate cold seizures. Machined Smooth Heads Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%. Anodized Domes Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons. Hypereutectic Casting Process Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures.
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
XR 50R Comp. 10.0:1 CRF 50F Comp. 10.0:1
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 2004 - 09 78mm 56-W4830+00A.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 78.97mm 56-W8806.A.NF
– – – – – – – – – – – – –
– – – – – –
– – – – – – – – – – – – – – – – – – – – – – – – – – –
CRF 70F XR 70R
XR 200
XR 200R
CRF 250R Comp. 13.2:1
Hyperdryve
56-R7703.NT 56-R7703.NT 56-R7704.NT 56-R7704.NT 56-R7704.NT 56-R7704.NT 56-R7704.NT
Comp. 13.2:1
N Forged
CRF 250R Comp. 13.2:1
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
CRF 250R Comp. 13.5:1 CRF 250R Comp 13.5.1 CRF 250R Comp. 13.5.1 CRF 250X Comp. 13.2:1
2020
78mm 56-W4788.A.NF
Hyperdryve
2005 - 17 78mm 56-W4830+00A.NT * 2005 - 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 - 20 96mm 56-W9949.A.NT.F 2017 - 18 96mm 56-W9949.A.NT.F 2005 - 16 96mm 56-W4820.A.NT 2005 - 17 96mm 56-W4820.A.NT.F
– –
56-R7703.NT 56-R7703.NT
Comp. 13.2:1
N Forged
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
CRF 450R Comp. 13.5:1 CRF 450RX Comp. 13.5:1 CRF 450X Comp. 12.0:1
– –
Hyperdryve
56-R7705.NT 56-R7705.NT
N Forged
* Will not accept oem rings from 2006-07 CRF250R or 2007-09 CRF250X models ** Will not accept oem rings or circlips
HUSABERG 2-Stroke
Piston Type
Years
Size
Piston Kit
Oem Ref
Piston Rings
Small End Bearing
TE 125 Dual Ring TE 250 Single Ring
2012 - 14 54mm 56-W010.A.NT 2011 - 14 66.4mm 56-W824.A.NT 2011 - 14 75mm 56-W854.A.NT
– – –
56-R722 56-R725
56-800.SI 56-802.SI 56-802.SI
TE 300
–
4-Stroke
Piston Type Hyperdryve Hyperdryve Hyperdryve Hyperdryve Hyperdryve
Years
Size
Piston Kit
Oem Ref
Piston Rings 56-R7708.NT 56-R7718.NT 56-R7718.NT
Small End Bearing
FE 250 FC 350 FE 350 FE 450 FX 450
2013 2014
76mm 56-W4730+00A.NT 88mm 56-W4735+00A.NT
– – – – –
– – – –
2013 - 14 88mm 56-W4735+00A.NT 2009 - 12 95mm 56-W243.A.NT 2010 - 12 95mm 56-W243.A.NT
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– *Please visit our website for current prices E39
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