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Vertex 2-Stroke Piston
Vertex 2-Stroke Piston

$ 47.25 - $ 197.96
10% Off - Save up to $21.99

Item #VER0003

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63 Reviews
4.9 out of 5 stars
5 Star   58 4 Star   4 3 Star   0 2 Star   1 1 Star   0
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All Reviews
Verified Purchaser
Flathead lake, MT
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
One of the best

My go to piston for sure, easy installation, I get 80+ hrs on ktm 300xc snowbiking and dirt.

Top 250
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
2 years in review on a two stroke

As an OEM supplier vertex is quality. they supply ktm husky and husaberg. i have not had a failure in 2 years of running this brand with over 300 hours of use. that is 9 top ends!! and i have over heated the engine so bad that the piston pin changed color. still no failure. the rings are always in spec and i have not had to file a set yet. the pistons has also been in spec and true every time. call them they have a great tech support.

Verified Purchaser
Albuquerque, NM
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Top end kit for KTM 300xc

This kit came with everything I needed to do a complete top end build. Quality items. I would highly recommend for anyone needing a top end kit.

Verified Purchaser
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 4/5
Q&Q Quality and Quick

Quality rebuilds that work everytime! I live in Iowa and motosport puts this stuff in my doorstep in 2 days for free!! Can’t beat them! Vertex also coats piston to help with break in. I’ll be a customer as long as my son is running minis!

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Vertex piston “aka ktm stock piston

Funny how a manufacturer printed box is more expensive than the vertex box.
Flip a “ktm” piston over and it’s stamped vertex inside.

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Compressor was 180psi seems to be a good product

Still going strong almost 3 weeks later

Verified Purchaser
Morro Bay, Ca.
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Great Product!

Like that Vertex offers the "B" Piston for the YZ 250. Nice piece, well made, & I replace every 30 hours.

Macungie, PA
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 5/5
Excellent Kit

This is my second time using this kit for my 2012 KTM 150 XC. Beware that the wrist pin for the KTM 150 XC kit are real tight. You will need to use a light coating of grease to get the pin in the piston. Other than that, it's a nice kit. I got 60 hours on my first kit.

Verified Purchaser Top 250
Durability 5/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 4/5
Vertex 2-Stroke Piston KTM 125

Able to get a solid 25 hours of race plus trail riding out of this Piston. found no wear after 25 hours.

Verified Purchaser
chehalis wa
Durability 1/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 1/5

bought it for 98 yz250 got my heat cycles in then rode down at the dunes blew up right when I got on the pipe I assume power valve hit and now cylinder is screwed but piston installed good had a nice coating and ring gap was spot on

See 10 More Reviews
16 Questions
Answered:   12
Not Yet:   4
Jared lilly
Q: What piston would fit in my 2009 ktm105sx it says a bore b bore 
22 days ago
Q: I need 2004 ktm sx bore 55,4 mm piston
24 days ago
Top 10
24 days ago
A: We don't have the Vertex 2-Stroke Piston to fit a 2004 KTM 125SX with a 55.4mm bore.
The Wiseco Piston Kit is available to fit either a 54mm or 56mm bore, at this link: https://www.motosport.com/wiseco-prolite-piston-kit-2stroke?variant[WCO000O]=WCO000O-X001-Y010&variant[CMT0001]=CMT0001-X001-Y230&variant[WCO000P]=WCO000P-X001-Y336
Q: What are the specks for a 550mxc two stroke piston and wheres a cheap place to get piston +rings
1 month 9 days ago
Top 10
1 month 9 days ago
A: To help us to find parts to fit correctly, we will need to know the manufacturer and the model year of your 550MXC.
Q: Is the vertex size b a 55.96 for ktm 150 xc
4 months 24 days ago
Top 10
4 months 24 days ago
A: According to Vertex, the measurement is a 55.96mm Piston Diameter.
Q: I want flat top Piston for my KTM 112 model 2016
Over 5 months ago
Top 10
Over 5 months ago
A: Most modern day pistons are already flat top, that rounded top on pistons is almost obsolete at this point as the industry trends have leaned away from that, even in the two stroke engine. If you profile your bike in our system on our webpage you will see all the available options of pistons, and top end kits that will work for that bike.
Q: Hi, i need a flat top piston, is it available.? Thanks,
Over 6 months ago
Q: I need a 53.96 mm piston is this 53.96mm
1 year 10 months ago
Q: Just received my piston kit for my sons new 2017 KTM 65SX. The website said "Standard Bore". When I got the piston it says "Size CD".
1 year 11 months ago
Will this work for his bike? Never had it apart so I'm not sure what the bore diameter is....
Q: Does this come with head and cylinder gaskets?
Over 3 years ago
Over 3 years ago
A: No you have to buy the gaskets separately . I use cometic gaskets .
MotoSport Staff Expert
Over 3 years ago
A: No, this would be for the piston kit only (no gaskets). Gaskets can be found in our OEM section for your bike.

Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Q: Drill holes?
Over 3 years ago
For Wiseco pistons, the included instructions specify that 2 small holes must be drilled in the piston skirt to lubricate the exhaust bridge (2004 cr125). The Vertex piston instructions do not specify that this should be done, but I am cautious of leaving the exhaust bridge unlubricated. Should I drill the holes or not?
Expert MotoSport Staff
Over 3 years ago
A: No you should not need to drill holes in the Vertex Piston for your CR125.
1 - 10 of 16

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See Fitments
# Part Numbers
Product Variant Manufacturer Part #
Stock Bore 22189B
Stock Bore 22387B
Stock Bore 22502B
Stock Bore 22498B
Stock Bore 23004B
Stock Bore 23121B
Stock Bore 22520B
+1.50mm 22569150
+2.00mm 22569200
Stock Bore 23599B
Stock Bore 24105B
Stock Bore 24107AB
Stock Bore 23140C
Stock Bore 22877B
Stock Bore 22998B
Stock Bore 22248B
Stock Bore 22601B
Stock Bore 23928B
Stock Bore, A Piston 22584A
Stock Bore Single Ring 23621050
Stock Bore, B Piston 22991B
Stock Bore, B Piston 23383B
Stock Bore Single Ring 23637B
Stock Bore, A Piston N/A
Stock Bore 22447
Stock Bore 22521B
Stock Bore 22795B
Stock Bore 23124B
Stock Bore 22909B
Stock Bore 22652B
Stock Bore 22585B
Stock Bore 22854B
Stock Bore 22224B
Stock Bore 22356B
Stock Bore, Single Ring 22925B
Stock Bore +5mm Long Rod 23607
+0.50mm 22568050
+2.00mm 22568200
+0.75mm 22569075
Stock Bore Single Ring 22996B
Stock Bore 22863B
Stock Bore 22685C
Stock Bore 22153B
Stock Bore 22581B
Stock Bore 22860B
Stock Bore 22712B
Stock Bore, CD Piston 23429CD
Stock Bore, A Piston 22991A
Stock Bore 22650B
Stock Bore 23630B
Stock Bore 22216B
Stock Bore 22441B
Stock Bore 22532B
+1.00mm 22447100
+0.50mm 22569050
Stock Bore 24106AB
Stock Bore 22809B
Stock Bore 22244B
Stock Bore 23294B
Stock Bore 22868B
Stock Bore, B Piston 22584B
Stock Bore 22361B
+0.75mm 22568075
+1.00mm Long Rod 23607100
+1.50mm Long Rod 23607150
+2.00mm Long Rod 23607200
+2.50mm Long Rod 23607250
Stock Bore AB Piston 22481AB
Stock Bore 14.0:1 Compression 23605B
Stock Bore, A Piston 23928A
Stock Bore 23133B
Stock Bore 22813CD
Stock Bore 22806B
Stock Bore 23119B
Stock Bore 22151B
Stock Bore 22600B
Stock Bore 22649B
Stock Bore 23457B
+1.00mm 22568100
+0.50mm 23614050
Stock Bore AB Piston 23430AB
Stock Bore 13.5:1 Compression 23756B
Stock Bore, Single Ring A Piston N/A
Stock Bore 22499B
Stock Bore 22803B
Stock Bore CD Piston 23430CD
Stock Bore 22540B
Stock Bore 22154B
Stock Bore 22569
Stock Bore 22459B
Stock Bore 22541B
Stock Bore 24101B
+0.25mm 22568025
+0.25mm 22569025
+1.00mm 22569100
Stock Bore, AB Piston 23429AB
Stock Bore Stroker 23879B
Stock Bore 22995B
Stock Bore CD Piston 22481CD
Stock Bore, A Piston 23383A
Stock Bore, Double Ring 22926B
Stock Bore, B Piston 23375B
Stock Bore 22386B
Stock Bore 1
Stock Bore 22215B
Stock Bore 22245B
Stock Bore 22293B
Stock Bore 22442B
Stock Bore 22646B
+0.50mm 22447050
+1.50mm 22447150
+2.00mm 22447200
+1.50mm 22568150
+0.50mm Long Rod 23607050
Stock Bore Single Ring 23331B