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Wiseco Pro-Lite Piston Kit - 4-Stroke

$175.98 - $294.98
$128.99 - $253.98
4.60 out of 5 stars

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Wiseco Pro-Lite Piston Kit - 4-Stroke
Wiseco Pro-Lite Piston Kit - 4-Stroke
  • Description
  • Reviews (34)
  • Q&A (43)
  • Fitment

The MotoSport.com Wiseco Pro-Lite Piston Kit - 4-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.

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.

4.6 out of 5 stars (34)
4.6 out of 5 stars
5 star   27
4 star   4
3 star   1
2 star 0
1 star   2
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1-10 of 34
Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Moncks Corner
whiteYZ450f

As expected Wiseco put all of the power back into my bike with the aftermarket look. The piston looked so good i almost didnt want to put it in the motor. I have a couple hard rides and havent had the the first problem

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: atx
race
Excellent replacement

Wiseco has never failed me yet, and this piston is no different. It looks excellent and the machining is top-notch. Killer upgrade for any stock bike, or replacement for a toasted piston.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: In the land of the free and the home of the brave
MadMark
Wiseco Pro-Lite Piston Kit

What else is there to say...Wiseco puts out the best pistons, producing the power required when you snap the throttle, nothing else compares!!!

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Bedford, VA 24523, USA
slymx759
Everything you should expect

Purchased a Wiseco top end kit for my 06' CRF250r. The kit is everything you should expect from a top end company like Wiseco. High compression piston made a huge power difference. Installation was easy for a mechanic. would not recommend a beginner/shade tree to attempt, but if you do...please open your book and follow the instructions. And of course customer service/shipping etc. was everything you should expect from a top notch company like motosport.com. Would have no problem recommending both product and company to any friend!!

Overall 4 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: SV, AZ
Z1000
Easy Install

This was the first top end rebuild that I have done on any engine and it was surprisingly easy, with a little help from youtube, just make sure you get your timing right

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Callicoon, NY, USA
Travis
Top notch

best pistons out there great power easy to use come with everything you need for the job two thumbs up

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Location: Orlando, FL, USA
holeshotholm151
Great piston!

I bought it for my 2011 kx450f and oh man this thing gives you're bike soo much more power! The Top end is way longer now and it added so much more bottom end power! Love it glad I bought it! Deffinatly worth the price. It went together perfect with no problems!

Overall 5 out of 5 stars
Verified Purchaser Top 50 Contributor Top 100 Contributor
Location: Tuscaloosa, AL
BlueDogMoto
First time for me

I've never replaced a piston before in a four stroke. But, with the economy the way it is I thought I would give it a try. Changing the piston is pretty simple but you have to take a lot of items off the bike to access the piston. I found this Wiseco top-end kit worked great for my KX250F. Everything worked perfectly including the gaskets and rings. I've put 50 hours on my bike since the piston replacement and it is running great!

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 1000 Contributor
yzf258
Top end for days

This piston added ridiculous top end.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Hampstead, MD, USA
vinnie
Powerful

much light piston than stock

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Justin 1 month 17 days ago
What is the compression ratio of this piston for a 2014 kx450?
MotoSport Staff Expert
1 month 17 days ago
MotoSportExpert
For your 2014 Kawasaki KX450F this Wiseco Pro-Lite Piston Kit would be 12.5:1. 40082M09600 12.5:1 PISTON 96MM
dclifton426f 3 months 19 days ago
Does this kit include valve seals for a 2000 yz426f?
Expert MotoSport Staff
3 months 18 days ago
MotoSportExpert
No. The Cometic gasket kit for your 2000 Yamaha YZ426F (C7689) includes: 1 - Head Gasket 1 - Base Gasket 1 - Cam Chain Tensioner Gasket
migua 3 months 28 days ago Location: Curacao
Will this kit fit a 2006 crf250R?
MotoSport Staff Expert
3 months 27 days ago
MotoSportExpert
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.
John 4 months 9 days ago
Are these Pistons the stock compression ratio?
Expert MotoSport Staff
2 months 21 days ago
MotoSportExpert
Yes for your 2008 Yamaha YFZ450 this would be the standard compression piston (4865M09500). Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
curtis 4 months 23 days ago
Where can I get a complete top end kit and a sleeve with stock bore for a 2004 trx 400ex that has a 11:1 piston.?
MotoSport Staff Expert
4 months 21 days ago
MotoSportExpert
You can find the LA Sleeve Cylinder Sleeve Standard Bore for your 400EX below. This Wiseco Pro-Lite Piston Kit would be the standard 10:01. For the 11:01 please give us a call at 888-676-8853 and we can do a special order for you.
EthanC Over 5 months ago Location: Hesperia, CA, USA
What compression ratio does this piston have?
i have 2013 kx250f and the stock compression ratio is 13.8:1 , i couldnt find the ratio for this one, i dont want to get the wrong top end
Expert MotoSport Staff
Over 5 months ago
MotoSportExpert
The standard bore Wiseco Pro-Lite Piston Kit for your 2013 Kawasaki KX250F would be 13.5:1 compression ratio. The stock OEM piston can be found in the OEM section here: http://www.motosport.com/dirtbike/oem-parts/kawasaki/2013/kx250f/cylinder~piston%28s%29
Julian Over 5 months ago
Where do the oil line washers go?
I don't have any of those oil lines with the banjo bolts on my bike so where would the washers go
Top 1 Contributor
Over 5 months ago
MotoSportExpert
Here is what the top end gasket kit includes: Top End Kit includes: 1 - Head Gasket 1 - Base Gasket 1 - Exhaust Gasket 1 - Cam Chain Tensioner Gasket 2 - Exhaust Valve Stem Seals 3 - Intake Valve Stem Seals 6 - Oil Line Washers 1 - Head Drain Washer If you are unsure of an item, please refer to the OEM service manual for assistance.
Julian Over 6 months ago
Does this kit include valve seals?
What all comes in this top end gasket kit
MotoSport Staff Expert
Over 6 months ago
MotoSportExpert
The Cometic Top End Kit for your 2006 Yamaha YZ450F will include the following: C7908-EST Yamaha YZ450F 06-09 Yamaha WR450 07-14 Top End Kit includes: 1 - Head Gasket 1 - Base Gasket 1 - Exhaust Gasket 1 - Cam Chain Tensioner Gasket 2 - Exhaust Valve Stem Seals 3 - Intake Valve Stem Seals 6 - Oil Line Washers 1 - Head Drain Washer
Bigz993 Over 6 months ago
Will this Kit Fit The Crf150 or Do I have to get a different kit?
Expert MotoSport Staff
Over 6 months ago
MotoSportExpert
Yes the Wiseco Pro-Lite Piston Kit will fit the CRF150R. 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.
dclifton426f Over 6 months ago
Does this kit have a 13:1 compression ratio for a 2000 yz426f?
MotoSport Staff Expert
Over 6 months ago
MotoSportExpert
No, for your 2000 Yamaha YZ426F it would have a standard 12:5:1 compression piston (4693M09500).
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