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Vertex 2-Stroke Piston Kit - Stock Bore
Vertex 2-Stroke Piston Kit - Stock Bore

$97.31 - $226.61
9% Off - Save up to $9.58

Item #VER0008

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56 Reviews
4.4 out of 5 stars
5 Star   41 4 Star   9 3 Star   0 2 Star   1 1 Star   5
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All Reviews
Florida, USA
Ease of Installation 1/5
Don't do it

I have installed many, many, many pistons over more than 35 years of racing and riding. I have always used another very popular brand without any problems whatsoever. I don't know why I did this but thought I would try Vertex. The piston pin circlip would not go in no matter what I did! The circlip is just too thick and stiff to be inserted. I have never had this problem with the other brand, ever. The unsuccessful install was for a 2012 300 xcw.

Unfortunately, this piston kit was in my parts inventory and more than 90 days has elapsed since I purchased it; therefore it can't be returned.

Lesson learned, if you are happy with something stick with it.

Verified Purchaser Top 250
Waynesburg PA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Great top end kit

Everything fits, no issues

California, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
BEST PISTON EVER MADE

this top end kit is by far the best! i have 286 hours of hard riding on my bike and it only just now is getting worn! i will never use another brand vertex is the way to go and i have never had any problems with any of my bikes with this top end. theres a good reason every one of the bikes racer x builds uses vertex pistons.

Verified Purchaser
Dania Beach, FL, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5

You people are the best thanks!

Honolulu, HI, USA
Durability 1/5 Ease of Installation 5/5 Performance 1/5 Power 3/5 Style 5/5
Ruined my rebuild

The vertex piston came along with my hot rods crank rebuild as I was rebuilding the entire bike. Everything was going well, install was a breeze. Locked down the top end and then fired it up. Compression was amazing, I had a hard time kicking down that kickstarter. It ran for 20 seconds on the first kick, then suddenly stopped. Lost all compression, I was able to push the kickstarter down by hand. Skirt and rings were just shot and gouged my cylinder wall.

Missouri, USA
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Easy to install and fit like stock

very pleased with these piston kits, I used these on my 2000 kx250 and they worked great so I decided to try them on my new bike too.

Verified Purchaser
Weatherford, ok
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
KTM 65sx

Quality is outstanding, the install went perfectly and the bike runs much better. Ktm uses vertex from the factory, the durability has been outstanding. I highly recommend using this product, the gaskets are very good as well.

Verified Purchaser Top 500 Contributor
Pittsburgh
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
Great kit.

Used this in a 2011 kx85. It's been through 2 woods series races and is holding up just fine. Every bit as good as any other brands I've used.

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

Dayton, OH, USA
Ease of Installation 4/5
Good kit

Parts seems of good quality. I like that the needle bearing it comes with us hot rod. Haven't ridden with it yet so I can't speak on power or reliability. My only complaint is it didn't come with the copper crush washers for the head bolts that my YZ 250 has. I didn't notice untill reassembly. Had to order them separately. Would rather pay more for the kit and have them included. Other than that it went together great.

See 10 More Reviews
40 Questions
Answered:   35
Not Yet:   5
Zeke
Q: Can i purchuse just the needle bearing for my 91 rm125
3 months 12 days ago
Jakeext3453
Top 25
3 months 12 days ago
A: Yes you can. We have them from the OEM department or after market.
Joseywales40
Vertex 2-Stroke Piston Kit - Stock Bore
Vertex 2-Stroke Piston Kit - Stock Bore
Vertex 2-Stroke Piston Kit - Stock Bore
Vertex 2-Stroke Piston Kit - Stock Bore
Vertex 2-Stroke Piston Kit - Stock Bore
Vertex 2-Stroke Piston Kit - Stock Bore
Q: Will this replace old piston?
Over 6 months ago
Just pulled the head off what I think is a 2000 Kawasaki KX 125. Having trouble determining the exact year of the bike. Anyways I was just wondering if this piston kit Is the same bore as the one I pulled. The one I just pulled has taken a little bit of rubbing and heat it looks like. It is a single ring piston as shown in pictures. I uploaded a picture of the bike and the piston and was just wondering if anybody had any info.
DaveGearhead
Top 10 Contributor
Over 6 months ago
A: You will need to take your cylinder in to a machine shop to have it bore checked against the manufacturer's specs. Once you have the size and condition of your bore you can then figure out what size piston you need to purchase. If you do not follow this recommendation, you risk damage to your cylinder, which is likely no longer available for replacement due to age.
Michael
Top 10
Over 6 months ago
A: The best way to determine the year of your bike is by looking up the year through your VIN number. If you are still running the stock motor and stock bore, and you discover that your bike is indeed a 00 KX125 two stroke than this will be the replacement part that you need.
Primo
Q: Will the kit come with everything I need?? For my 1998 yz125
Over 7 months ago
David
Top 10 Contributor
Over 7 months ago
A: Yes it will include everything to complete the top end.
Isaac
Top 10
Over 7 months ago
A: The kit includes piston, piston rings, circlips, piston pin, needle bearing, and top end gasket kit for your model. The kit includes all items to replace your piston.
Marcus
Q: Hello I have a 2002 Cr125r and it has an exhaust bridge is the vertex pistons come pre drilled
Over 8 months ago
David
Top 10 Contributor
Over 8 months ago
A: They don't come pre drilled
Brad
Q: I bought a new jug for my Kx 85 will this piston fit? It is a moose racing cylinder std
1 year 5 months ago
Jjohnson
Q: What piston size is this I have a 2009 Ktm 250 xcw
1 year 7 months ago
2009 Ktm 250xcw
Tomskog
Q: What piston should I choose for a 2014 yz250?
1 year 9 months ago
Eric
Q: Is the piston in the 2015 KTM 300 XC kit a B piston?
1 year 9 months ago
What is the gasket thickness under the jug? I have been told there should be a .2 and a .4 gasket installed under the jug.
EricL
Q: What is the measurements on this piston?
1 year 9 months ago
Is this piston A,B,C or D?
Kurt820
Q: Is this a single ring piston and what will fit a 2014 kx85 85?
2 years 3 months ago
MotoSportExpert
MotoSport Staff Expert
2 years 3 months ago
A: Yes. Just be sure to correctly select the Year/Make/Model of your bike before ordering so we can be sure to send you the correct kit 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.
1 - 10 of 40
Fitment
See all bikes that this part fits...
See Fitments
# Part Numbers
Gasket Kit
Product Variant Manufacturer Part #
Vertex 2-Stroke Piston Kit - Stock Bore C7010
Vertex 2-Stroke Piston Kit - Stock Bore C7115
Vertex 2-Stroke Piston Kit - Stock Bore C7943
Vertex 2-Stroke Piston Kit - Stock Bore C7250
Vertex 2-Stroke Piston Kit - Stock Bore C7507
Vertex 2-Stroke Piston Kit - Stock Bore C7158
Vertex 2-Stroke Piston Kit - Stock Bore C7855
Vertex 2-Stroke Piston Kit - Stock Bore C3085
Vertex 2-Stroke Piston Kit - Stock Bore C7936
Vertex 2-Stroke Piston Kit - Stock Bore C7059
Vertex 2-Stroke Piston Kit - Stock Bore C7093-EST
Vertex 2-Stroke Piston Kit - Stock Bore C7508
Vertex 2-Stroke Piston Kit - Stock Bore C7120
Vertex 2-Stroke Piston Kit - Stock Bore C7778
Vertex 2-Stroke Piston Kit - Stock Bore C7859
Vertex 2-Stroke Piston Kit - Stock Bore C7760
Vertex 2-Stroke Piston Kit - Stock Bore C3211
Vertex 2-Stroke Piston Kit - Stock Bore C7112
Vertex 2-Stroke Piston Kit - Stock Bore C3416
Vertex 2-Stroke Piston Kit - Stock Bore C7136
Vertex 2-Stroke Piston Kit - Stock Bore C7757
Vertex 2-Stroke Piston Kit - Stock Bore C7779
Vertex 2-Stroke Piston Kit - Stock Bore C7942
Vertex 2-Stroke Piston Kit - Stock Bore C7467
Vertex 2-Stroke Piston Kit - Stock Bore C3105
Vertex 2-Stroke Piston Kit - Stock Bore C3099
Vertex 2-Stroke Piston Kit - Stock Bore C7399
Vertex 2-Stroke Piston Kit - Stock Bore C7064
Vertex 2-Stroke Piston Kit - Stock Bore C7113
Vertex 2-Stroke Piston Kit - Stock Bore C7065
Vertex 2-Stroke Piston Kit - Stock Bore C7337
Vertex 2-Stroke Piston Kit - Stock Bore C7123
Vertex 2-Stroke Piston Kit - Stock Bore C7851
Vertex 2-Stroke Piston Kit - Stock Bore C7156
Vertex 2-Stroke Piston Kit - Stock Bore C7292
Vertex 2-Stroke Piston Kit - Stock Bore C7280
Vertex 2-Stroke Piston Kit - Stock Bore C7094
Vertex 2-Stroke Piston Kit - Stock Bore C7505
Vertex 2-Stroke Piston Kit - Stock Bore C7678
Vertex 2-Stroke Piston Kit - Stock Bore C7857
Vertex 2-Stroke Piston Kit - Stock Bore C7181
Vertex 2-Stroke Piston Kit - Stock Bore C7853
Vertex 2-Stroke Piston Kit - Stock Bore C3222
Vertex 2-Stroke Piston Kit - Stock Bore C7394
Vertex 2-Stroke Piston Kit - Stock Bore C7386
Vertex 2-Stroke Piston Kit - Stock Bore C7133
Vertex 2-Stroke Piston Kit - Stock Bore C7089
Vertex 2-Stroke Piston Kit - Stock Bore C7098
Vertex 2-Stroke Piston Kit - Stock Bore C7031
Vertex 2-Stroke Piston Kit - Stock Bore C7019
Vertex 2-Stroke Piston Kit - Stock Bore C7456
Vertex 2-Stroke Piston Kit - Stock Bore C3089
Vertex 2-Stroke Piston Kit - Stock Bore C7126
Vertex 2-Stroke Piston Kit - Stock Bore C7392
Vertex 2-Stroke Piston Kit - Stock Bore C7020
Vertex 2-Stroke Piston Kit - Stock Bore C7003
Vertex 2-Stroke Piston Kit - Stock Bore C7116
Vertex 2-Stroke Piston Kit - Stock Bore C7016
Vertex 2-Stroke Piston Kit - Stock Bore C7015
Vertex 2-Stroke Piston Kit - Stock Bore C7333
Vertex 2-Stroke Piston Kit - Stock Bore C7762
Vertex 2-Stroke Piston Kit - Stock Bore C7416
Vertex 2-Stroke Piston Kit - Stock Bore C7921
Vertex 2-Stroke Piston Kit - Stock Bore C7816
Vertex 2-Stroke Piston Kit - Stock Bore C7203
Vertex 2-Stroke Piston Kit - Stock Bore C7682
Vertex 2-Stroke Piston Kit - Stock Bore C7241
Vertex 2-Stroke Piston Kit - Stock Bore C7391
Vertex 2-Stroke Piston Kit - Stock Bore C7393
Vertex 2-Stroke Piston Kit - Stock Bore C7088
Vertex 2-Stroke Piston Kit - Stock Bore C7764
Vertex 2-Stroke Piston Kit - Stock Bore C7097
Vertex 2-Stroke Piston Kit - Stock Bore C7861
Vertex 2-Stroke Piston Kit - Stock Bore C7117
Vertex 2-Stroke Piston Kit - Stock Bore C7269
Vertex 2-Stroke Piston Kit - Stock Bore C7285
Vertex 2-Stroke Piston Kit - Stock Bore C3096
Vertex 2-Stroke Piston Kit - Stock Bore C7384
Vertex 2-Stroke Piston Kit - Stock Bore C7100
Vertex 2-Stroke Piston Kit - Stock Bore C7423
Vertex 2-Stroke Piston Kit - Stock Bore C7135
Vertex 2-Stroke Piston Kit - Stock Bore C7690
Vertex 2-Stroke Piston Kit - Stock Bore C7155
Vertex 2-Stroke Piston Kit - Stock Bore C7191
Needle Bearing
Product Variant Manufacturer Part #
Vertex 2-Stroke Piston Kit - Stock Bore WB138
Vertex 2-Stroke Piston Kit - Stock Bore WB119
Vertex 2-Stroke Piston Kit - Stock Bore WB101
Vertex 2-Stroke Piston Kit - Stock Bore WB120
Vertex 2-Stroke Piston Kit - Stock Bore WB117
Vertex 2-Stroke Piston Kit - Stock Bore WB115
Vertex 2-Stroke Piston Kit - Stock Bore WB116
Vertex 2-Stroke Piston Kit - Stock Bore WB112
Vertex 2-Stroke Piston Kit - Stock Bore WB113
Vertex 2-Stroke Piston Kit - Stock Bore WB110
Vertex 2-Stroke Piston Kit - Stock Bore WB111
Vertex 2-Stroke Piston Kit - Stock Bore WB108
Vertex 2-Stroke Piston Kit - Stock Bore WB107
Vertex 2-Stroke Piston Kit - Stock Bore WB104
Vertex 2-Stroke Piston Kit - Stock Bore WB118
Vertex 2-Stroke Piston Kit - Stock Bore WB144
Vertex 2-Stroke Piston Kit - Stock Bore WB102
Vertex 2-Stroke Piston Kit - Stock Bore WB106
Vertex 2-Stroke Piston Kit - Stock Bore WB141
Vertex 2-Stroke Piston Kit - Stock Bore WB139
Vertex 2-Stroke Piston Kit - Stock Bore WB128
Piston
Product Variant Manufacturer Part #
+0.50mm 23614050
+1.00mm Long Rod 23607100
Stock Bore, Single Ring A Piston N/A
Stock Bore 22151B
Stock Bore 22154B
Stock Bore 22520B
Stock Bore 22854B
Stock Bore 22541B
Stock Bore 22293B
Stock Bore Single Ring 23331B
Stock Bore 23928B
Stock Bore 22540B
+1.00mm 22447100
Stock Bore 22224B
+0.50mm 22568050
Stock Bore 23119B
+2.00mm 22568200
Stock Bore 1
+1.00mm 22569100
Stock Bore 22245B
Stock Bore 23430AB
Stock Bore 22459B
Stock Bore 22499B
Stock Bore 22649B
Stock Bore 22863B
Stock Bore +5mm Long Rod 23607
Stock Bore 22189B
+2.00mm 22447200
Stock Bore 22685C
+1.00mm 22568100
Stock Bore 22995B
+0.50mm 22569050
Stock Bore 23140C
+2.00mm 22569200
Stock Bore 22153B
+2.00mm Long Rod 23607200
Stock Bore 22387B
Stock Bore AB Piston 22481AB
Stock Bore 22581B
Stock Bore 22809B
Stock Bore 23133B
Stock Bore 22585B
Stock Bore 22447
Stock Bore 22868B
Stock Bore 22860B
Stock Bore 22441B
Stock Bore 22502B
Stock Bore 22806B
Stock Bore 22803B
Stock Bore 22356B
Stock Bore 22498B
Stock Bore, B Piston 22584B
Stock Bore 22712B
Stock Bore 22569
Stock Bore 23004B
Stock Bore 22215B
Stock Bore 22244B
Stock Bore 22248B
Stock Bore 22521B
Stock Bore 22442B
Stock Bore 22795B
Stock Bore 22532B
Stock Bore 23124B
Stock Bore 22646B
Stock Bore 22813CD
Stock Bore, Single Ring 22925B
Stock Bore CD Piston 22481CD
Stock Bore, A Piston 22584A
Stock Bore 23430CD
+0.50mm 22447050
Stock Bore 23294B
+1.50mm 22447150
Stock Bore, A Piston 23383A
+0.25mm 22568025
Stock Bore, Double Ring 22926B
+0.75mm 22568075
Stock Bore 22650B
+1.50mm 22568150
Stock Bore 22909B
+0.25mm 22569025
Stock Bore 23121B
+0.75mm 22569075
Stock Bore 23630B
+1.50mm 22569150
Stock Bore, B Piston 23375B
+0.50mm Long Rod 23607050
Stock Bore 22877B
+1.50mm Long Rod 23607150
Stock Bore 22216B
+2.50mm Long Rod 23607250
Stock Bore 22652B
Stock Bore Single Ring 23621050
Stock Bore 22998B
Stock Bore Single Ring 22996B
Stock Bore 22386B
Stock Bore, B Piston 23383B
Stock Bore, A Piston 23928A
Stock Bore Single Ring 23637B
Stock Bore, A Piston N/A