Shopping CartCLOSE
Shop 2020 Riding Gear For Dirt Bike And Street Bike >
Pro X Piston Kit - 2-Stroke
Pro X Piston Kit - 2-Stroke

$85.99 - $186.99
16% Off - Save up to $15.98

Item #CSB000B

Read More
32 Reviews
4.8 out of 5 stars
5 Star   26 4 Star   5 3 Star   1 2 Star   0 1 Star   0
All Reviews
Tec497 Verified Purchaser
4 days 17 hours ago West Virginia
Durability3/5Ease of Installation5/5Performance3/5Power5/5Style5/5
Prox

So far so good, the first few hours on thpiston feel strong. Time will tell

Richiecipolla
Over 7 months ago Florida
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Perfect fit, easy install

I bought this for my 1992 cr125, and it runs like its brand new!

Texx Verified Purchaser
1 year ago McKee Ky
Durability4/5Ease of Installation5/5Performance5/5Power5/5
Good product

Quality products for a good price. Really woke up my little 125.

Chad195 Verified Purchaser
1 year 1 month ago Alaska
Ease of Installation5/5
Just what I wanted.

I just bought this not too long ago came with everything I needed to do the top and rebuild wrote it last week and everything seems to be fine.

MotoMericanRacing Verified Purchaser
1 year 6 months ago PNW
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Easy Install

This was so easy to install my 13year old daughter installed it in her bike@motomerican racing

Ezkidgtrect
2 years 1 month ago
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
High quality

Fit my 2001 kx250 and it runs great

hair Verified Purchaser
2 years 5 months ago
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5

Terry Verified Purchaser
2 years 5 months ago
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5
Just what I needed.

Exactly what I needed. Fast shipping. The top end kit worked like a charm

MotoManiac Verified Purchaser
2 years 6 months ago
Durability4/5Ease of Installation2/5Performance4/5Power4/5Style3/5
2003 rm85

Bought for my bike and wrist pin did not fit. Also the gaskets did not line up properly. I do not recommend.

Cyclefather Verified Purchaser
2 years 7 months ago
Durability5/5Ease of Installation5/5Performance5/5Power5/5Style5/5

See 10 More Reviews
31 Questions
Answered:   29
Not Yet:   2
Hotrod
Q: Is this piston a two ring or one ring piston?
4 months 9 days ago
DaveGearhead
Top 1
4 months 9 days ago
A: 125cc bike - 1 ring
250cc bike - 2 ring
austin123
Q: I was wondering i got a yz250 and it’s bored 68.5 i don’t see an option for the bore 
4 months 18 days ago
DaveGearhead
Top 1
4 months 18 days ago
A: Wiseco sells a piston for that bore.

804M06850 $184.00 68.50mm 2.10mm
Cylinders:
1
Displacement:
265cc
Skirt Coating:
ArmorGlide
Stroke:
72.00mm
Notes:
Pro-Lite, Ceramic Composite Bore, Cylinder sleeving required, Cylinder replating
JoeDirt
Q: I'm assuming the heavy duty smaller O-rings are exhaust gaskets? They're the only thing left, and I'd rather not find out the hard way that they are not exhaust o-rings.
Over 12 months ago
JamesGearhead
Top 10
Over 12 months ago
A: I believe the smaller clips you are refering to in the image are the circlips that keep the piston on the wrist pin. This kit also comes with a Cometic top end gasket kit. Depending on the year, make and model of your machine the kit may or may not come with exhaust gaskets. Give the Motosport Gearheads a call at 1-888-676-8853 for technical and fitment questions, and they can help find the part you need.
chris
Q: I have a kx 80 1993 r3, will it fit. Cylinder is 48mm
Over 12 months ago
Noahsarc
Q: I have a 1996 cr125r with a 54.5 size piston will this fit thank you 
1 year ago
JamesGearhead
Top 10
1 year ago
A: Once you profile your bike into the website, you will be able to select this piston for your bike. It will fit on your 1996 CR125.
Brad
Q: Hey I'm. Looking for a pro x piston for my 96 Yamaha yz 250 stock bore is 68mm but I'm boring out the cylinder to fit a 69mm piston I've been looking on this site for one but all I can find is stock bore do yous make a 69mm piston for a 96 Yz 250 pro x
1 year 1 month ago
TylerGearhead
Top 25
1 year 1 month ago
A: We can typically get special order items. Please give us a call and we can discuss this! 1-888-676-8853.
CRdave
Q: I have a 2006 Cr125 and the piston in my bike is stock and it only has one groove with one piston ring. It says it fits my bike but has two groves? And this comes with all the gaskets I need? 
1 year 3 months ago
Thumbs
Top 10
1 year 3 months ago
A: The picture is very general and doesn't picture your exact kit. The kit will have everything your specific bike requires when it comes to rings and gaskets.
Eric
Q: I have a 2002 Honda CR250R and was wondering if this Pro-X piston has to be drilled for exhaust bridge?
1 year 6 months ago
robert
Top 10
1 year 6 months ago
A: You will not need to drill the bridge on your 2002 cr250.
GozTown
Q: Will the gaskets fit an ‘00 Cr250?
1 year 8 months ago
When I go to check out with this kit in my cart, the gaskets in the picture are different then the gaskets in the original picture before I view it in my cart. Can someone help? I would appreciate it.
JustinS
Top 100 Contributor
1 year 8 months ago
A: This kit will fit your vehicle. The picture shown may not reflect the actual product for your specific bike.
Flip
Q: Do you have this piston in the size 67.50mm.if not could u help me find one of that size please its for a 2003 honda cr250
2 years 6 months ago
MotoSportExpert
Expert MotoSport Staff
2 years 6 months ago
A: Please give us a call at 888-676-8853 and one of our customer service agents would be more than happy to get you all set up!

Thanks!
1 - 10 of 31
Fitment

See all bikes that this part fits...

See Fitments
# Part Numbers
Gasket Kit
Product Variant Manufacturer Part #
Pro X Piston Kit - 2-Stroke C7040
Pro X Piston Kit - 2-Stroke C3096
Pro X Piston Kit - 2-Stroke C7010
Pro X Piston Kit - 2-Stroke C7762
Pro X Piston Kit - 2-Stroke C7089
Pro X Piston Kit - 2-Stroke C7423
Pro X Piston Kit - 2-Stroke C7136
Pro X Piston Kit - 2-Stroke C7018
Pro X Piston Kit - 2-Stroke C7059
Pro X Piston Kit - 2-Stroke C7112
Pro X Piston Kit - 2-Stroke C7120
Pro X Piston Kit - 2-Stroke C7508
Pro X Piston Kit - 2-Stroke C7778
Pro X Piston Kit - 2-Stroke C7155
Pro X Piston Kit - 2-Stroke C7779
Pro X Piston Kit - 2-Stroke C7682
Pro X Piston Kit - 2-Stroke C7467
Pro X Piston Kit - 2-Stroke C7045
Pro X Piston Kit - 2-Stroke C3099
Pro X Piston Kit - 2-Stroke C7259
Pro X Piston Kit - 2-Stroke C7064
Pro X Piston Kit - 2-Stroke C7386
Pro X Piston Kit - 2-Stroke C7065
Pro X Piston Kit - 2-Stroke C7003
Pro X Piston Kit - 2-Stroke C7123
Pro X Piston Kit - 2-Stroke C7203
Pro X Piston Kit - 2-Stroke C7156
Pro X Piston Kit - 2-Stroke C7861
Pro X Piston Kit - 2-Stroke C7280
Pro X Piston Kit - 2-Stroke C7100
Pro X Piston Kit - 2-Stroke C7505
Pro X Piston Kit - 2-Stroke C7154
Pro X Piston Kit - 2-Stroke C7054
Pro X Piston Kit - 2-Stroke C7031
Pro X Piston Kit - 2-Stroke C7857
Pro X Piston Kit - 2-Stroke C7042
Pro X Piston Kit - 2-Stroke C7349
Pro X Piston Kit - 2-Stroke C7087
Pro X Piston Kit - 2-Stroke C7853
Pro X Piston Kit - 2-Stroke C7134
Pro X Piston Kit - 2-Stroke C7936
Pro X Piston Kit - 2-Stroke C7384
Pro X Piston Kit - 2-Stroke C3105
Pro X Piston Kit - 2-Stroke C7690
Pro X Piston Kit - 2-Stroke C7084
Pro X Piston Kit - 2-Stroke C3222
Pro X Piston Kit - 2-Stroke C7139
Pro X Piston Kit - 2-Stroke C7020
Pro X Piston Kit - 2-Stroke C7158
Pro X Piston Kit - 2-Stroke C7126
Pro X Piston Kit - 2-Stroke C7399
Pro X Piston Kit - 2-Stroke C7921
Pro X Piston Kit - 2-Stroke C7855
Pro X Piston Kit - 2-Stroke C7241
Pro X Piston Kit - 2-Stroke C7113
Pro X Piston Kit - 2-Stroke C7764
Pro X Piston Kit - 2-Stroke C7250
Pro X Piston Kit - 2-Stroke C7269
Pro X Piston Kit - 2-Stroke C7337
Pro X Piston Kit - 2-Stroke C7041
Pro X Piston Kit - 2-Stroke C7507
Pro X Piston Kit - 2-Stroke C7135
Pro X Piston Kit - 2-Stroke C7137
Pro X Piston Kit - 2-Stroke C7047
Pro X Piston Kit - 2-Stroke C7851
Pro X Piston Kit - 2-Stroke C7501
Pro X Piston Kit - 2-Stroke C3211
Pro X Piston Kit - 2-Stroke C7030
Pro X Piston Kit - 2-Stroke C7292
Pro X Piston Kit - 2-Stroke C7391
Pro X Piston Kit - 2-Stroke C3416
Pro X Piston Kit - 2-Stroke C7019
Pro X Piston Kit - 2-Stroke C7678
Pro X Piston Kit - 2-Stroke C7043
Pro X Piston Kit - 2-Stroke C7757
Pro X Piston Kit - 2-Stroke C7046
Pro X Piston Kit - 2-Stroke C7181
Pro X Piston Kit - 2-Stroke C7088
Pro X Piston Kit - 2-Stroke C3085
Pro X Piston Kit - 2-Stroke C7133
Pro X Piston Kit - 2-Stroke C7115
Pro X Piston Kit - 2-Stroke C7242
Pro X Piston Kit - 2-Stroke C7394
Pro X Piston Kit - 2-Stroke C7859
Pro X Piston Kit - 2-Stroke C7191
Pro X Piston Kit - 2-Stroke C7416
Pro X Piston Kit - 2-Stroke C3089
Pro X Piston Kit - 2-Stroke C7456
Pro X Piston Kit - 2-Stroke C7015
Pro X Piston Kit - 2-Stroke C7816
Pro X Piston Kit - 2-Stroke C7016
Pro X Piston Kit - 2-Stroke C7943
Pro X Piston Kit - 2-Stroke C7116
Pro X Piston Kit - 2-Stroke C7009
Pro X Piston Kit - 2-Stroke C7333
Pro X Piston Kit - 2-Stroke C7760
Needle Bearing
Product Variant Manufacturer Part #
Pro X Piston Kit - 2-Stroke B1083
Pro X Piston Kit - 2-Stroke B1042
Pro X Piston Kit - 2-Stroke B1037
Pro X Piston Kit - 2-Stroke B1043
Pro X Piston Kit - 2-Stroke B1080
Pro X Piston Kit - 2-Stroke B1038
Pro X Piston Kit - 2-Stroke B1041
Pro X Piston Kit - 2-Stroke B1022
Pro X Piston Kit - 2-Stroke B1036
Pro X Piston Kit - 2-Stroke B1014
Pro X Piston Kit - 2-Stroke B1016
Pro X Piston Kit - 2-Stroke B1012
Pro X Piston Kit - 2-Stroke B1013
Pro X Piston Kit - 2-Stroke B1006
Pro X Piston Kit - 2-Stroke B1008
Pro X Piston Kit - 2-Stroke B1003
Pro X Piston Kit - 2-Stroke B1004
Pro X Piston Kit - 2-Stroke B1000
Pro X Piston Kit - 2-Stroke B1001
Piston
Product Variant Manufacturer Part #
Stock 01.2314.B
Stock 01.2224.B
Stock 01.2215.B
Stock 01.2114.B
Stock 01.3320.B
Stock 01.3224.B
Stock 01.4306.B
Stock 01.6105.B
Stock 01.6029.B
Stock 01.6022.B
Stock 01.6012.B
Stock 01.4408.B
Stock 01.4325.B
Stock 01.4322.B
Stock 01.1309.000
Stock 01.3180.000
Stock 01.6219.B
Stock 01.3220.B
Stock 01.6226.B
Stock 01.3310.B
Stock 01.6220.B
Stock 01.2109.B
Stock 01.6228.B
Stock 01.2211.B
Stock 01.6322.B
Stock 01.2217.B
Stock 01.6324.B
Stock 01.2225.B
Stock 01.6394.B
Stock 01.2321.B
Stock 01.3111.000
Stock 01.1300.000
Stock 01.4223.B
Stock 01.4216.B
Stock 01.4285.B
Stock 01.4121.B
Stock 01.4221.B
Stock 01.4022.B
Stock 01.4214.B
Stock 01.1408.000
Stock 01.4108.B
Stock 01.1323.B
Stock 01.4100.B
Stock 01.1315.A1
Stock 01.1325.A1
Stock 01.1218.A2
Stock 01.1320.A1
Stock 01.1113.B
Stock 01.1225.B
Stock 01.3122.B
Stock 01.1208.A2
Stock 01.3214.B
Stock 01.1111.B
California Proposition 65

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.