Pro X

Pro X 2-Stroke Piston

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Rating: 4.3 out of 5 stars
62 Reviews
23 Questions
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Product Details
Important note: This piston is for a stock or oversized bore. Please measure your cylinder to check clearance before ordering.

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 and European engine manufacturers. ProX Piston Kits are a first class solution to replace the original piston in your machine.

Most ProX pistons come with a coating. The O.E.M. style tin-coated pistons assist the wear-in process as when you first started the bike. ProX has developed a new skirt coating that not only assists the wear-in process, but also helps reducing friction after the wear-in. The black coating is made from a delicate mix of materials and will increase performance.
- Cast piston puts engine back to standard specs without boring or replacing cylinder.
- The stock sized pistons interchange directly with O.E.M. part.
- Piston kit comes complete with piston, rings, pin and end clips.
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Pro X 2-Stroke Piston Review
23 Questions about the Pro X 2-Stroke Piston
Fitment

# Part Numbers for the Pro X 2-Stroke Piston

Product Variant	Manufacturer Part #
.010" Oversize	01.2020.025
.020" Oversize	01.2020.050
.030" Oversize	01.2020.075
.040" Oversize	01.2020.100
.050" Oversize	01.2020.125
.060" Oversize	01.2020.150
.070" Oversize	01.2020.175
.080" Oversize	01.2020.200
.090" Oversize	01.2020.225
.100" Oversize	01.2020.250
A Piston / 59.95mm	01.2232.A
B Piston / 59.96mm	01.2232.B
C Piston / 59.97mm	01.2232.C
Oversized / 40.5mm / +.50mm	01.2005.050
Oversized / 41mm / +1.00mm	01.2005.100
Oversized / 47.5mm / +.50mm	01.2008.050
Oversized / 48mm / +.50mm	01.3111.050
Oversized / 48mm / +1.00mm	01.2008.100
Oversized / 49mm / +1.50mm	01.3111.150
Oversized / 50.5mm / +.50mm	01.3180.050
Oversized / 51.5mm / +1.50mm	01.3180.150
Oversized / 51mm / +1.00mm	01.3180.100
Oversized / 66.25mm / +.25mm	01.2281.025
Oversized / 66.5mm / +.50mm	01.2281.050, 01.1300.050, 01.1309.050, 01.4286.050
Oversized / 66.75mm / +.75mm	01.2281.075
Oversized / 67.25mm / +1.25mm	01.2281.125
Oversized / 67.5mm / +1.50mm	01.2281.150, 01.4286.150, 01.1300.150, 01.1309.150
Oversized / 67.75mm / +1.75mm	01.2281.175
Oversized / 67mm / +1.00mm	01.1309.100, 01.1300.100, 01.4286.100, 01.2281.100
Oversized / 68mm / +2.00mm	01.1300.200, 01.2281.200, 01.1309.200, 01.4286.200
Oversized / 89.25mm / +.25mm	01.1408.025
Oversized / 89.5mm / +.50mm	01.1408.050
Oversized / 89.75mm / +.75mm	01.1408.075
Oversized / 90.25mm / +1.25mm	01.1408.125
Oversized / 90.5mm / +1.50mm	01.1408.150
Oversized / 90mm / +1.00mm	01.1408.100
Oversized / 91mm / +2.00mm	01.1408.200
Stock	01.6219.B, 01.4325.B, 01.3310.B, 01.2114.B, 01.3320.B, 01.4322.B, 01.4100.B, 01.6220.B, 01.4216.B, 01.3214.B, 01.1208.A2, 01.1300.000, 01.2215.B, 01.6394.B, 01.2211.B, 01.6029.B, 01.1113.B, 01.1408.000, 01.3180.000, 01.2225.B, 01.1218.A2, 01.1325.A1, 01.4306.B, 01.4285.B, 01.2224.B, 01.1309.000, 01.4408.B, 01.1320.A1, 01.6022.B, 01.4221.B, 01.2321.B, 01.3220.B, 01.1315.A1, 01.4022.B, 01.4108.B, 01.1111.B, 01.3111.000, 01.6012.B, 01.6322.B, 01.3122.B, 01.2109.B, 01.1225.B, 01.2281.000, 01.1323.B, 01.3001.000, 01.6226.B, 01.2217.B, 01.2314.B, 01.3224.B, 01.6228.B, 01.4223.B, 01.6343.B
Stock Bore / 39.46mm / A	01.6019.A, 01.6012.A
Stock Bore / 39.47mm / B	01.6019.B
Stock Bore / 39.48mm / C	01.6012.C, 01.6019.C
Stock Bore / 40mm	01.2005.000
Stock Bore / 42.95mm / A	01.4100.A
Stock Bore / 43.44mm / A	01.2018.A
Stock Bore / 43.45mm / B	01.2018.B
Stock Bore / 43.46mm / C	01.2018.C
Stock Bore / 44.45mm / A	01.4022.A
Stock Bore / 44.47mm / C	01.4022.C
Stock Bore / 44.48mm / D	01.4022.D
Stock Bore / 44.96mm / A	01.6029.A, 01.6022.A
Stock Bore / 44.98mm / C	01.6022.C, 01.6029.C
Stock Bore / 44.99mm / D	01.6029.D
Stock Bore / 45.94mm / B	01.2107.B
Stock Bore / 45.95mm / B	01.1110.B
Stock Bore / 45.95mm / C	01.2107.C
Stock Bore / 45.96mm / C	01.1110.C
Stock Bore / 45.96mm / D	01.2107.D
Stock Bore / 46.95mm / A	01.6105.A, 01.4118.A
Stock Bore / 46.95mm / C	01.2109.C
Stock Bore / 46.96mm / B	01.6105.B, 01.4118.B
Stock Bore / 46.96mm / C	01.1111.C
Stock Bore / 46.96mm / D	01.2109.D
Stock Bore / 46.97mm / C	01.6105.C, 01.4118.C
Stock Bore / 46.98mm / D	01.4118.D, 01.6105.D
Stock Bore / 47.44mm / A	01.2114.A
Stock Bore / 47.46mm / C	01.2114.C, 01.1113.C
Stock Bore / 47.94mm / A	01.4108.A, 01.3122.A
Stock Bore / 47.96mm / C	01.3122.C, 01.4108.C
Stock Bore / 47.97mm / D	01.4108.D
Stock Bore / 47mm	01.2008.000
Stock Bore / 48.45mm / A	01.4121.A, 01.4124.A
Stock Bore / 48.46mm / B	01.4124.B, 01.4121.B
Stock Bore / 48.47mm / C	01.4121.C, 01.4124.C
Stock Bore / 52.45mm / A	01.4195.A, 01.4194.A
Stock Bore / 52.46mm / B	01.4194.B, 01.4195.B
Stock Bore / 52.47mm / C	01.4194.C, 01.4195.C
Stock Bore / 53.93mm / A	01.1208.A
Stock Bore / 53.94mm / A	01.1222.A, 01.6226.A, 01.2215.A, 01.6220.A, 01.1218.A1, 01.1225.A, 01.3214.A, 01.3220.A, 01.2224.A, 01.6216.A, 01.1208.A1
Stock Bore / 53.95mm / A	01.2225.A, 01.3224.A, 01.2217.A, 01.4216.A, 01.4223.A
Stock Bore / 53.95mm / B	01.6216.B, 01.4213.B, 01.1222.B
Stock Bore / 53.96mm / A	01.4221.A, 01.4218.A
Stock Bore / 53.96mm / C	01.2224.C, 01.1218.A3, 01.6216.C, 01.3220.C, 01.4210.C, 01.1208.A3, 01.3214.C, 01.1225.C, 01.2215.C, 01.4213.C, 01.6226.C, 01.6220.C, 01.1222.C
Stock Bore / 53.97mm / C	01.4216.C, 01.2217.C, 01.4223.C, 01.3224.C, 01.2225.C
Stock Bore / 53.97mm / D	01.2224.D, 01.3214.D, 01.1222.D, 01.6216.D, 01.6220.D, 01.4210.D, 01.1218.A4, 01.3220.D, 01.4213.D, 01.1225.D, 01.6226.D
Stock Bore / 53.98mm / C	01.4218.C, 01.4221.C
Stock Bore / 53.98mm / D	01.4216.D, 01.2225.D, 01.2217.D
Stock Bore / 53.99mm / D	01.4218.D
Stock Bore / 54.19mm / A	01.6219.A
Stock Bore / 54.21mm / C	01.6219.C
Stock Bore / 54.22mm / D	01.6219.D
Stock Bore / 55.94mm / A	01.6228.A
Stock Bore / 55.96mm / C	01.6228.C
Stock Bore / 55.97mm / D	01.6228.D
Stock Bore / 55.98mm / E	01.6228.E
Stock Bore / 57.94mm / A	01.6241.A, 01.6237.A
Stock Bore / 57.95mm / B	01.6241.B, 01.6237.B
Stock Bore / 57.96mm / C	01.6241.C, 01.6237.C
Stock Bore / 63.94mm / A	01.6249.A
Stock Bore / 63.95mm / B	01.6249.B
Stock Bore / 63.96mm / C	01.6249.C
Stock Bore / 63.97mm / D	01.6249.D
Stock Bore / 65.94mm / A	01.4285.A
Stock Bore / 65.96mm / C	01.4285.C
Stock Bore / 65.97mm / D	01.4285.D
Stock Bore / 66.33mm / A	01.7307.A
Stock Bore / 66.34mm / A	01.6322.A, 01.1315.A, 01.6343.A, 01.1325.A, 01.1323.A, 01.1320.A, 01.6319.A, 01.3320.A, 01.7313.A
Stock Bore / 66.34mm / B	01.7307.B
Stock Bore / 66.35mm / A	01.7337.A, 01.2321.A
Stock Bore / 66.35mm / B	01.7313.B, 01.6319.B, 01.7337.B
Stock Bore / 66.35mm / C	01.7307.C
Stock Bore / 66.36mm / B	01.1325.A2, 01.1320.A2, 01.1315.A2
Stock Bore / 66.36mm / C	01.4322.C, 01.6343.C, 01.4325.C, 01.7313.C, 01.7337.C, 01.3320.C, 01.6319.C, 01.6322.C, 01.1323.C
Stock Bore / 66.37mm / B	01.1315.A3
Stock Bore / 66.37mm / C	01.2321.C, 01.1325.A3, 01.1320.A3
Stock Bore / 66.37mm / D	01.4322.D, 01.6343.D, 01.1323.D, 01.4325.D
Stock Bore / 66.38mm / D	01.2321.D, 01.1315.A4
Stock Bore / 66.94mm / A	01.3311.B
Stock Bore / 66.95mm / C	01.3311.C, 01.3310.C
Stock Bore / 66.96mm / D	01.3311.D, 01.3310.D
Stock Bore / 66.97mm / E	01.3310.E
Stock Bore / 67.36mm / C	01.4306.C
Stock Bore / 67.37mm / D	01.4306.D
Stock Bore / 67.44mm / A	01.6317.A
Stock Bore / 67.45mm / B	01.6317.B
Stock Bore / 67.46mm / C	01.6317.C
Stock Bore / 71.94mm / A	01.6387.A, 01.6396.A, 01.6394.A, 01.6388.A, 01.7398.A, 01.7300.A, 01.7346.A, 01.7393.A
Stock Bore / 71.95mm / B	01.7393.B, 01.7346.B, 01.7300.B, 01.6396.B, 01.7398.B, 01.6387.B, 01.6388.B
Stock Bore / 71.96mm / C	01.6396.C, 01.6387.C, 01.7300.C, 01.6388.C, 01.7398.C, 01.7346.C, 01.7393.C, 01.6394.C
Stock Bore / 77.94mm / A	01.6397.A
Stock Bore / 77.95mm / B	01.6397.B
Stock Bore / 77.96mm / C	01.6397.C
Stock Bore / 78.95mm / A / 13.6:1	01.6341.A
Stock Bore / 78.96mm / B / 13.6:1	01.6341.B
Stock Bore / 78.97mm / C / 13.6:1	01.6341.C
Stock Bore / 85.94mm / A	01.4408.A

WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling. For more information, go to www.P65Warnings.ca.gov.

Pro X 2-Stroke Piston

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