ProX
Piston Kits
ProX Piston Kits ProX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers. ProX piston kits are a first class solution to replace the original piston in your motorcycle. ProX piston kits for sleeved cylinders are available in standard size and a wide range of over sizes. ProX pistons for plated cylinders come in standard size, A, B, C, D & over sizes. All ProX piston kits are supplied complete with piston rings, wrist pin and circlips, ready to install!
GASGAS 2-Stroke Models
Years
Size
Piston Kit
Piston Rings 56-R1246.PX 56-R1248.PX 56-R1227.PX 56-R1223.PX 56-R1207.PX 56-R1200.PX 56-R1200.PX 56-R1200.PX 56-R1201.PX 56-R1201.PX 56-R1201.PX
Piston Pin
Piston Clips 56-0166.PX 56-0166.PX 56-0170.PX 56-0174.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX 56-0181.PX
Small End Bearing
MC 50 MC 65 MC 85 MC 125
2021 - 23 39.5mm 56-W802.A.PX 2021 - 23 45mm 56-W313.A.PX 2021 - 23 47mm 56-W012.A.PX 2021 - 23 54mm 56-W035.A.PX
56-6513.PROX 56-6307.PROX 56-821.PROX 56-800.PROX 56-802.PROX 56-8020.PROX 56-8020.PROX 56-8020.PROX 56-802.PROX 56-8020.PROX 56-8020.PROX
56-783.PX 56-781.PR
MC/EC/XC 250
1997 - 19 66.4mm 2021 - 23 66.4mm 2022 - 23 66.4mm 2022 - 23 66.4mm
56-W157.A.PROX 56-W214.A.PROX 56-W214.A.PROX 56-W214.A.PROX
EC 250 EX 250 MC 250
56-7924.PROX 56-7924.PROX 56-7924.PROX
EC/XC 300
2000 - 19 72mm 56-W159.A.PX 2021 - 23 72mm 56-W9984.A.PX 2021 - 23 72mm 56-W9984.A.PX
56-781.PR
EC 300 EX 300
GASGAS 4-Stroke Models EC 250F (Std. Comp. 12.5:1) EC 250F (Std. Comp. 13.8:1) EC 250F (Std. Comp. 14.5:1) EX 250F (Std. Comp. 14.4:1) EX 250F (Std. Comp. 14.5:1) MC 250F (Std. Comp. 14.4:1) MC 250F (Std. Comp. 14.5:1) EC 350F (Std. Comp. 13.5:1) EX 350F (Std. Comp. 14.2:1)
Years
Size
Piston Kit
Piston Rings 56-R1208.PX 56-R1225.PX
Piston Pin 56-0718.PR
Piston Clips 56-0175.PX 56-0176.PX
Small End Bearing
2010 - 15 77mm 56-W188.A.PX 2021 - 23 78mm 56-W954.A.PX
– – – – – – – – – – – – – – – –
56-6500.PROX
2024
81mm 56-W4984.A.PX
2021 - 23 78mm 56-W265.A.PX
56-R1278.PX
56-6500.PROX
56-0176.PX
2024
81mm 56-W4984.A.PX
2021 - 23 78mm 56-W265.A.PX
56-R1278.PX
56-6500.PROX
56-0176.PX
2024
81mm 56-W4984.A.PX
2021 - 24 88mm 56-W4735_00A.PX 2021 - 24 88mm 56-W4735_00A.PX 2023 - 24 88mm 56-W4735_00A.PX 2013 - 15 95mm 56-W222.A.PX 2013 - 15 95mm 56-W223.B.PX 2021 - 23 95mm 56-W956.A.PX
56-R1202.PX 56-R1202.PX 56-R1202.PX 56-R1209.PX 56-R1209.PX 56-R1203.PX
56-0725.PROX 56-0725.PROX 56-0725.PROX
56-0181.PX 56-0181.PX 56-0181.PX 56-0182.PX 56-0182.PX 56-0185.PX
MC 350F
EC 450F (Std. Comp. 12.5:1)
56-0726.PR 56-0726.PR
(High Comp. 13.0:1)
EX 450F (Std. Comp. 12.75:1) EX 450F (Std. Comp. 13.1:1) MC 450F (Std. Comp. 12.75:1) MC 450F (Std. Comp. 13.1:1)
56-7959.PROX
2024
95mm 56-W4985.A.PX
2021 - 23 95mm 56-W956.A.PX
56-R1203.PX
56-7959.PROX
56-0185.PX
2024
95mm 56-W4985.A.PX
ProX 4-Stroke Piston Kits
• ProX 4-stroke pistons for performance applications are forged, while others are cast. Because most motorcycle and ATV applications are high performance, the majority of ProX 4-stroke pistons are forged. • When treated properly, 4032 alloy offers greater strength and more wear resistance thanks to reduced thermal expansion and increased hardness. • ProX 4-stroke pistons’ alloy reduces the chances of microwelding in the ring grooves thanks to the additional hardness. • ProX pistons are designed and manufactured to OEM specifications at a minimum. Some designs are improved upon based on market need or an OEM weak point. • ProX only uses rings that come from reputable Japanese OE suppliers. A piston is only as good as its ring pack. • ProX 4-stroke piston kits include the piston, rings, wrist pin, and wire locks. They are available for a wide range of applications
*Please visit our website for current prices
E-mail: sales@oro2u.com
www.oro2u.com
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