Earn $5 Fast Cash with Purchase

Wiseco Pro-Lite Piston Kit - 2-Stroke

$125.97 - $261.97
$87.55 - $215.77
4.80 5 152
4.80 out of 5 stars

This Purchase Qualifies For:

 
Wiseco Pro-Lite Piston Kit - 2-Stroke
Wiseco Pro-Lite Piston Kit - 2-Stroke
  • Description
  • Reviews (152)
  • Q&A (145)
  • Fitment

The MotoSport.com Wiseco Pro-Lite Piston Kit - 2-Stroke includes one of each of the following components with the following attributes:

The Wiseco Piston Kit is not just a basic piston replacement, it is a performance piston kit that is more durable than O.E.M. pistons and includes everything necessary to rebuild your top end.

Wiseco Pro-Lite Piston:

Important note: This piston is for a stock sized bore. Please measure your cylinder to check clearance before ordering.

Wiseco leads the performance aftermarket by producing the highest quality forged pistons in the U.S.A. Wiseco is unique because they forge all of their own pistons in-house, and produce all of their own forge tooling in the U.S.A. This allows Wiseco to control all aspects of their manufacturing process from raw bar to skirt coating on the finished parts.

Wiseco Pro-Lite motorcycle pistons are forged using the highest quality materials available resulting in a piston that provides excellent performance and durability. The Wiseco Pro-Lite piston features a race-ready dome finish with smooth edges for improved combustion flow. The rings, wrist pin, and circlips are manufactured by Wiseco under their strict quality standards to make sure every piston kit fits correctly, ensuring top performance is achieved.

Pro-Lite Piston features:

  • Much stronger than stock.
  • Tight tolerances for quiet running.
  • More hours with peak performance between piston changes.
  • All Pro-Lite pistons include rings, wrist pin and circlips.

Extreme racing conditions demand the strength and toughness that only forged pistons can offer. Compared to cast pistons, forgings are tougher and more durable, and will stand up to the abuse that high performance motorsport applications require. Most castings are brittle, have no grain structure and tend to fail catastrophically when the material yield strength is exceeded. Forgings have condensed grain that is aligned to the features of the part, which produces higher mechanical properties, and resistance to impact and fatigue. Each forging is designed to optimize the strength-to-weight ratio, and maximize performance.

Wiseco Needle Bearing:

The Wiseco Needle Bearing is a high quality replacement wrist pin bearing designed to withstand the harsh demands of racing. Wiseco built their needle bearing to meet or exceed O.E.M. specifications.

Cometic Top End Gasket Kit:

State-of-the-art gaskets is what Cometic has been doing since its inception in 1989. This comes from their dedication to constructing gaskets for the most demanding race circuits like AMA and NASCAR. Today's lightweight engines are producing more horsepower, higher cylinder pressure, clamp load and extreme temperatures. Cometic's commitment is to provide innovative, quality gaskets while maximizing your engine's power and performance.

Cometic meets the needs of each specific gasket by using materials to match. Even the basic top end gasket kit features different materials for each gasket. The head gasket is constructed from non-asbestos, flexible graphite that is laminated to a stainless steel core. The manifold and base gaskets are constructed from non-asbestos nitride rubber-bound fiber. Cometic also includes copper gaskets where needed.

Cometic designs and builds their gaskets in the U.S.A.

Note: Image is for reference only, actual Kit may vary based on contents and fitment.

4.8 out of 5 stars (152)
4.8 out of 5 stars
5 star   161
4 star   17
3 star 0
2 star   2
1 star   3
See Terms and Conditions
1-10 of 152
Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Steve
Easy to install

I did my first top end this season on my cr250r and everything fit perfectly. I wasn't aware of the hours on old piston thank god I changed it. Starts first kick

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Newfoundland and Labrador, Canada
Billyboots
Excellent kit, very reliable

Once i replaced my stock ktm piston, and put in this wiseco kit, my engine ran so much better! i could feel the power difference, as my bike needed a rebuild anyway, i went for something that wouldnt break the bank, And i sure did make a great choice!

Overall 4 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Graham, TX 76450, USA
YamahaG
Perfect for Broad Power

This product was simply an easy pick for the project I had come upon, I was extremely impressed with the performance and strength this product can withstand. I recommend this kit to anybody, and for the fact that MotoSport makes this a forged piston impresses me as well. I found everything I needed and the installation was no waste of time. To all the people out there rebuilding there toys, I recommend Motosports forged pistion kits for any project in process.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Location: north carolina
Nicknackzz
GIVE YOUR 2 STROKE WHAT IT NEEDS! A WIESCO

.. Awesome piston kit with all the looks power and absolute. Awesomeness a piston puts out..

Motosport done an amazing job shipping my order and getting here by the weekend so I could rebuild the top end of my kx125 so I could get out there and brrraaaapppppp! !!!!

Ooh God the first kick after the rebuild felt so good ..she started up and purred Luke a tiger humping another tiger! She puurreeddd and screammmmeedd VROOOOMMMMMM. SHE WENT AS I TWISYED THE GRIP!

broke her in with a 15min idle and short ride with repeat... outstanding product and excellent service from motosport! !!

Thank you!!!!!

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 1000 Contributor
Location: Omaha, NE, USA
Budswr400
Everything you need.

We installed this in my sons 98 CR125. First off all the parts needed are in this kit. After installation it has tons more mid-range power and is overall better running, I guess it was long overdue, He bought the bike used and we had no idea of previous maintenance but it made it run much better.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: NC
Paully
Quality parts

Never had a bad experience using Wiseco
products.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 1000 Contributor Verified Purchaser
Location: Nj
Nicco
Solid top end

Good top end not unhappy with anything about the kit,

Overall 4 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Harlingen, TX, USA
Mike

Only issue with product is exhaust gaskets
didn't fit my P.C pipe! Should have an opt available !

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Hazard, KY, USA
hoscat201
Best piston kit made

i have bought almost every brand of piston kits but this is the one that stood out the most it has lasted the longest while providing the same amount of power it almost never looses power and it is super durable i will continue running this piston kit and also recomend it to everybody i know

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Fontana, KS 66026, USA
ThomF
Great piston

Great piston. Great performance.

1-10 of 152
Total Questions (145)
Questions with answers:
  145
Questions without answers:
0
Fitting?...
anthony Location: Twentynine Palms, CA, USA
1-10 of 145
Jordan 24 days ago
Hi, my motorcycle yamaha yz125 2007, is necessary to me the size (C) 53,97. You can help ?
Expert MotoSport Staff
24 days ago
MotoSportExpert
No, Wiseco does not offer A,B,C,D pistons. The difference in the sizes is 0.01mm (0.0004") increments with A being the smallest and D the biggest.
maanes 2 months ago Location: Norway
What kind off the pistons fit my bike ? honda cr 250r 2007?
i was thinking about mesuring the bore diameter . but i didn`t find the diameter off the piston on your page. also i can`t find my piston to bore clearance stock bore 66.40 mm
MotoSport Staff Expert
1 month 27 days ago
MotoSportExpert
When ordered for the 2007 Honda CR250 this Wiseco Pro-Lite Piston Kit would be the stock bore 66.40mm. Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
anthony 2 months 21 days ago Location: Twentynine Palms, CA, USA
Fitting?
What size should I buy I have a 2004 cr250r and not sure what size I need to get
Expert MotoSport Staff
2 months 20 days ago
MotoSportExpert
If you are just replacing the piston, then you need to first know the bore of the cylinder. This can be done by using a bore gauge to find the diameter or by reading the owner’s manual to find the bore specifications. Ultimately, the bore should be measured for the best possible results. After the diameter is known, then you can pick which size piston will work best in your cylinder. If you have a stock bore cylinder you would need the stock bore piston kit. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Will 3 months 8 days ago
Is the part number 806M04800?
MotoSport Staff Expert
3 months 4 days ago
MotoSportExpert
Yes the stock bore piston kit for your 2003 Suzuki RM85 would be Wiseco part number 806M04800.
ethan223 3 months 16 days ago
Will it fit in cyclinder without removing the iron sleeve?
on a 99 kx125, if i put in a .080 oversize, would that take off the iron sleeve or is 2mm small enough that it wont affect it? and is it the first size up from stock?
Expert MotoSport Staff
3 months 16 days ago
MotoSportExpert
The 1999 Kawasaki KX125 uses a Nickel Silicon Carbide (NSC) plated cylinder which would need to be re-plated if bored. Wiseco offers two piston sizes for your bike. A 54mm which is standard and a 56mm (+2mm). If your cylinder has been re-sleeved with a steel sleeve you would need to measure the bore to determine which piston you would need.
For cylinder re-surfacing I recommend Millennium Technologies (http://www.mt-llc.com/index.php).

Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Dylanpax 4 months ago
Will a .20 bore piston fit in a stock cylinder?
MotoSport Staff Expert
3 months 29 days ago
MotoSportExpert
No, that would be .020" over stock bore. For the stock Bore cylinder you would need a stock bore piston. Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
walk3r 4 months 13 days ago Location: Mountain Home, ID 83647, USA
Fuel mixture?
I usually run 40/1 I just started riding but someone told me the Number one cause of a 2stroke to blow up is the wrong fuel mixture What should I run with this kit on a 2001 yz 125
Expert MotoSport Staff
4 months 9 days ago
MotoSportExpert
You should have no problems running 40/1 on your 2001 Yamaha yz125. Depending on the conditions generally 32/1 - 40/1 are optimum on a 125. I personally ran my 125s (cr125s and YZ125s) at 40/1 for many years with no issues. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
badass 4 months 29 days ago
Will the piston fit my stock jug?
MotoSport Staff Expert
4 months 28 days ago
MotoSportExpert
Yes Just be sure to correctly select the Year/Make/Model of your bike and the "stock bore" piston 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.
aguy Over 7 months ago
What size is the piston in mm?
Expert MotoSport Staff
Over 7 months ago
MotoSportExpert
The "stock bore" piston would be 47.50MM and the "080" Oversize" would be 49.50MM for your 2005 Yamaha YZ85.
JohnHonda Over 7 months ago Location: Australia
Will this fit in my 2007 Honda CR125?
Ordering from Australia and my bore is measured out to be 54mm and is stock bore size will I be able to use this piston for my rebuild.
MotoSport Staff Expert
Over 7 months ago
MotoSportExpert
This Wiseco Pro-Lite Piston Kit for the 2007 Honda CR125 would be 54mm. 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.
*Note: All products sold on Motosport.com are for US models only. We unfortunately do not have product fitment for non-us models.
1-10 of 145