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Pro X 4-Stroke Piston
Pro X 4-Stroke Piston

$ 83.99 - $ 165.99
12% Off - Save up to $23.00

Select your bike to see if this piston fits
Description See Also: 3 Reviews 2 Questions Fitment Part Numbers
Item #CSB0006

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3 Reviews
3.7 out of 5 stars
5 Star   1 4 Star   1 3 Star   0 2 Star   1 1 Star   0
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All Reviews
Verified Purchaser
Fort collins, CO
Durability 2/5 Ease of Installation 3/5 Performance 2/5 Power 2/5 Style 1/5
Rough surface

Surface is rough so carbon sticks to it easily. The skirt is paper thin compared to competitors, better have a perfect cylinder. valve seat edges are rounded off. Oil orifices are only on two sides of the piston. Stock performance. Will be my first and last pro x personally.

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 4/5
Best oem replacement piston on the market.

Simply the replacement piston. Allows for cylinder wear by offering 4 sizes to make compression readings as optimal as can be.
The fact that it comes as a kit makes it that much better so you every thing you need all in one box.

Verified Purchaser
Durability 4/5 Ease of Installation 4/5 Performance 4/5 Power 4/5 Style 4/5

2 Questions
Answered:   2
Not Yet:   0
Q: Your piston size comes up as 95.96mm my book said it is 96mm why the difference? I think my book is right.
Over 4 years ago
2006 Honda crf 450x
Top 1 Contributor
Over 4 years ago
A: Piston size vs Bore size.

You have a reference in your "book" as a bore size. You ALWAYS need to measure the bore size before ordering a piston and refer to the factory service manual to determine the correct piston for your bore size with the tolerances listed within that service manual.
Q: 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.
Over 5 years ago
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 5 years ago
A: 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.

See all bikes that this part fits...

See Fitments
# Part Numbers
Product Variant Manufacturer Part #
Stock 01.1227.B
Stock 01.1338.B
Stock 01.1339.B
Stock 01.1342.B
Stock 01.1403.B
Stock 01.1414.B
Stock 01.1411.B
Stock 01.4335.B
Stock 01.4337.B
Stock 01.4340.B
Stock 01.4406.B
Stock 01.4409.B
Stock 01.6338.B
Stock 01.6429.B
Stock 01.6424.B
Stock 01.6427.B
Stock 01.6508.B
Stock 01.6521.B
Stock 01.6528.B
Stock 01.3338.B
Stock 01.3341.B
Stock 01.3420.B
Stock 01.3410.B
Stock 01.3408.B
Stock 01.2406.B
Stock 01.2409.B
Stock 01.2427.B
Stock 01.2429.B
Stock 01.2440.B
Stock 01.4342.B
Stock 01.6351.B
Stock 01.6362.B
Stock 01.2412.B
Stock 01.1232.B
Stock 01.1413.B
Stock 01.4413.B
Stock 01.6333.B
Stock 01.1495.000
Stock 01.1496.B
Stock 01.4418.B
Stock 01.3406.B
Stock 01.2487.000
Stock 01.2435.B
Stock 01.2660.000
Stock 01.2706.B