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Pro X 4-Stroke Piston

Retail: $58.99 - $184.99
$54.99 - $169.99
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Vertex 4-Stroke Piston - Pro X 4-Stroke Piston
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Pro X 4-Stroke Piston

Product Description

Important note: This piston is for a stock sized 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.
  • Interchanges directly with O.E.M. part.
  • Ready to install.
  • Piston kit comes complete with piston, rings, wrist pin and end clips.
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Mike Over 8 months ago Location: Dallas, TX, USA
Not being a motor head at all..why do I need to messure the piston depth if your replacement piston is made to the exact specs as the original part.?
I've got a 93 Honda TRX300 4x4 I bought off a friend that needs a ring job done in it.. along with a few other things. Runs fine..but smokes like a coal stove.
MotoSport Staff
Over 8 months ago Location: Portland, OR, USA
You will actually want to measure the diameter of your cylinder to verify it is a stock bore. It should measure out to 74mm on the 1993 TRX300. If it measures larger, then this piston will not work and your would need an oversize piston. Measuring the bore will just ensure you order the correct piston size.
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