Wiseco Pro-Lite 2-Stroke Piston

$87.99 - $284.99
$73.77 - $234.99
4.90 out of 5 stars
Fitment Expert:
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Wiseco Pro-Lite 2-Stroke Piston
Wiseco Pro-Lite 2-Stroke Piston
  • Description
  • Reviews (60)
  • Q&A (43)
  • Fitment

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.

  • Much stronger than stock. Forged using the highest quality materials available resulting in a piston that provides excellent performance and durability.
  • Tight tolerances for quiet running. Featuring a race-ready dome finish with smooth edges for improved combustion flow.
  • More hours with peak performance between piston changes. 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 and long-lasting durability are achieved.
  • The Wiseco Pro-Lite Piston includes: piston, ring(s), wrist pin, and circlips.
  • Note: Oversize piston requires cylinder sleeving and top end bearing not included in kit.

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.

Note: Image is for reference ONLY, actual contents will vary based on fitment.

4.9 out of 5 stars (60)
4.9 out of 5 stars
5 star   52
4 star   5
3 star   1
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1 star   1
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1-10 of 60
Overall 5 out of 5 stars
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Arkansas, USA
Snowman294
Just what you expect from Wiseco

Just installed the Wiseco standard bore piston kit in my 2004 RM125. It was fairly easy to install, and the quality of the product is evident as soon as you take it out of the box. My bike is back to its old snappy, revy self again! Thanks Wiseco, and thanks MotoSport!

Overall 4 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
ammohog01
Good Piston

I just installed this piston in my 04 CR250. It is alive and fast as ever. Everything went together well and was easy to install. The only complaint is you get a little piston slap every once and a while, but that is it. The bike is fast and runs great. As always customer service at motosport.com is awesome.

Wiseco Pro-Lite 2-Stroke Piston
Overall 5 out of 5 stars
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Mesa, AZ, USA
blu119

Awesome shipping time, Awesome performace I have used wiseco many times and i've never been dissapointed....Motosport is by far the best online store to use

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
zx613
Piston

Great product awesome piston and my daughter loved the lined bag it came in

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
yingyang

Great product . Fit like it's supposed to.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Ringgold, LA 71068, USA
yz250rider
Best piston out there!

long lasting piston never had a problem running them ive had 3 every one has been fine strongest piston you can buy just let your bike warm up properly or you may have troubles because this piston expands with heat. all in all wiseco is all ill ever trust with my race bike (below) !

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Sissonville, WV, USA
dburkey
Awesome!

this is such a high quality piston, it came in its own little drawstring bag, with everything it needed except a needle bearing. fits great on my cr125. thanks motosport!!! any questions let me know.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Verified Purchaser
Location: Chicago, IL, USA
Mike
Great piston

I put this in my bike and rode it for 3 seasons. I then sold the bike to a friend and he still hasn't touched the top end. (we don't race) but the bike is still running strong. Great product

Overall 5 out of 5 stars
Ease of Installation
Style
Verified Purchaser
Location: Tenn
Racer13
Back on the track

Pretty easy to install and so far good compression.

Overall 3 out of 5 stars
Durability
Ease of Installation
Performance
Power
Style
Top 1000 Contributor Verified Purchaser
Location: Eastern NC
MaxT
It worked but going to cast

Installed this in my 200EXC when I did a complete rebuild last summer. It ran great, had great power, 215psi compression from installation until I pulled it out last week with 90 hours on it. It did me well for almost 3000 miles of singletrack, desert blasting, a trip to Moab, etc. My only complaint is that the forged Wisecos do run much noisier compared to a cast piston because of the increased cylinder-to-piston clearance required. Excessive piston slap can be heard both when the engine is cold and at operating temp. I put in a cast piston this go-round and will from here on out.

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Total Questions (43)
Questions with answers:
  43
Questions without answers:
0
Hey wats up?...
Bikelifewish
my89rm250
1-10 of 43
Chandler 3 months 29 days ago
OEM size?
Will it send the OEM size piston for my 1998 kx125? It says that this piston is 77mm. It would send the correct size right?
MotoSport Staff Expert
3 months 28 days ago
MotoSportExpert
Yes. Just be sure to correctly select the Year/Make/Model of your bike and "Stock Bore" in the drop down before ordering so we can be sure to send you the correct piston 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.
Bikelifewish 4 months 24 days ago
Hey wats up?
ThiS is the piston I need for my cr125 1997 Oversize .080
Expert MotoSport Staff
4 months 24 days ago
MotoSportExpert
Yes this Wiseco Pro-Lite 2-Stroke Piston will fit your 1997 CR125 and comes in oversized. 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.
Zach Over 5 months ago
Hi I have a 1991 kdx 200 and I'm wondering how much compression it's so post to have does it kick hard like a 250 or kick easy like a 125 please re?
MotoSport Staff Expert
4 months 19 days ago
MotoSportExpert
For compression specs and testing please refer to your Kawasaki Service manual.
Bikelifewish Over 5 months ago
Hey what's up so this is good for a Honda cr 125 1997 right?? It will fit right in???
If this the right size for A Honda cr 125 1997
Expert MotoSport Staff
Over 5 months ago
MotoSportExpert
Yes, it will fit a stock bore 1997 Honda CR125. 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.
nick Over 10 months ago
What size piston is this stock?
Top 1 Contributor
Over 10 months ago
MotoSportExpert
66.00mm is the stock bore size on the Yamaha Blaster 200
my89rm250 Over 11 months ago
What size piiston?
I just bought an 89 RM250 and the top end needs replacing but the piston inside the bike says 72.94MM and that's bigger that any of the sizes for this year bike why is this?
Expert MotoSport Staff
Over 11 months ago
MotoSportExpert
Sounds like you may have a 300 big bore cylinder on your bike. I would take it into your local dealership and have them look at the cylinder and mic it to determine if you have a big bore.
rust 1 year 1 month ago Location: Raymore, MO, USA
I have a piston that measures out 2.627 inch and a bore of 2.638. What oversize would work best? thank you?
Top 1 Contributor
Over 10 months ago
MotoSportExpert
Wiseco Pro-Lite 2-Stroke Piston kit for your Yamaha Blaster is made in different sizes. You will have to inspect the bore to make sure it does not need to be machined and then measured to ensure you get the correct piston kit. All Wiseco piston kits are listed in metric measurements for your convenience (1"=25.4mm)
daakkeegan 1 year 1 month ago
Will this kit come with rings if purchased for a 1994 honda cr80?
1 year 1 month ago Location: Ringgold, LA 71068, USA
yz250rider
Yes. All wiseco top end kits come with rings. You will need to buy a needle bearing though
Expert MotoSport Staff Top 1 Contributor
1 year 1 month ago
MotoSportGrantK
Yes, the Wiseco Pro-Lite 2-Stroke Piston will come with the piston, pin, ring (s) and cir-clips.
ajrowan12 1 year 1 month ago Location: Mississippi, USA
1995 rm125 fitment?
what overbore size will I need for a measurement of 54.85?
Top 1 Contributor MotoSport Staff Expert
1 year 1 month ago
MotoSportGrantK
You will need a 0.040 (55mm) piston . Re-Sleeving and power valve modification will be required for a 55mm or larger piston for your 1995 Suzuki RM125. I would recommend taking your motor to your local machine shop that would be able to make the necessary modifications.
casper17 1 year 2 months ago
I have a 02 kx100 it read 52.2 maybe im off a little bit but the piston on the site said std is 54?
Top 1 Contributor
Over 10 months ago
MotoSportExpert
Wiseco list the stock bore size for a 2002 KX100 as 52.50mm
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