Wiseco Piston Kit 50.00mm

Dedicated forging
Superior strength/weight ratio utilizing Aerospace alloy
Race proven designs
Chosen by top race teams, in all forms of racing
CNC machined
Optimal cam shape & profile for peak HP and service life
Precision machined, highest quality materials for strength and reduced friction
High-performance ring set
Extended life and sustained power
Highest quality, alloy pin
Consistently true and durable
Note: All kits cover a single cylinder only
All Wiseco 2-stroke top end kits include 1 piston, 1 ring set, 1 wristpin, 2 circlips, top-end bearings and gaskets
Wiseco top end kits are sold by application and bore size. To ensure you receive the correct kit for your application, you must know the standard bore size to make sure you are ordering either the standard or correct amount of oversize that you need. If you have any questions, please email us.

Wiseco Part#: PK1099
Product Type: Piston Kits

Specifications:

Bore - Standard: 50.00mm
Stroke: 42.00mm
Displacement: 82cc
Bore - Actual: 50.00mm
Bore - Oversize: STD

Item Contents:

1969CD - 50.00 MM RING SET
673M05000 - SUZ LT80 / KAW KFX80 1969CD
B1000 - TOP END BEARING 12 X 16 X 15.8mm
CW12 - ROUND WIRE PIN LOCKS 12MM (PAIR)
S538 - PIN-12MM X 1.5354"-UNCHROMED-2&4 C
W5520 - Gasket Kit - LT80 All Yrs/KFX80 '03-06

Specification	Details
Bore	50 mm
Country of Origin	USA
Number of Pistons Included	1 Piston
Size Over Standard	Stock

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

KFX80 ATV 2003-2006

LT80 QuadSport 80 1987-2006

Customer Reviews

Great product for the price.

Great fitment, bike runs great.

Great kit. Huge power upgrade.

Perfect fit with more power.

Wiseco always makes a great quality product. Ive used them many times over the years an never had failures. Failures mostly happen due to lack of preventive mat. Nothing last forever!

Worked great.

Excellent part.

I ordered this piston kit and an Athena Cylinder as well. All parts were correct, well priced, and arrived in good shape ready to go on.

5 stars

Perfect fit, correct size rings came with it, and gaskets were a perfect fit, and the wrist pin was pristine.

Great product! Great price! Thank you!

I never write reviews but then again I've never been this satisfied with service. I ordered it Thursday got it Saturday kids were riding Sunday! Honestly super impressed by how fast it got here, it was in great shape and fit like a glove.

Awesome, thanks.

Part was exactly what we ordered.

I’ve put about 30 hours of hard riding on this and it’s been holding up well! I highly recommend it. Just be sure to fully warm up your engine before doing anything hard on the engine.

Very impressed with the design of the pistons, added oil ports in the ring grooves, the machining is high quality, the detailed packaging show how much pride they take in their work.

5 Stars

Very high quality piston just like you would expect from Wiseco. Shipped quickly and very well packaged. Yamaha Bigbear 350 is running better than it ever has after a top end rebuild and a carb kit. Honed out the OEM cylinder and ring gap was .018 with the rings sent. Specs said 16-20 so right in the middle. Very clear instructions on checking gap and positioning ring gaps on piston. 93 Octane and thing is way snappier on tip-in than it ever has been. Totally satisfied with Wiesco on this one.

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Questions & Answers

Will this fit my 92 trail boss 250 2x4

By John

?

So long as you have chosen a 1992 Polaris Trail Boss 250 2X4 and you have a stock bore size cylinder, you should have no problem with fitment.

By Andy

Will this fit a 1990 Honda xr200r

By Eddie

Yes, just be sure of what size bore your cylinder is before ordering.

By Andy

Would this fit a 96 xr200r with a 65.5mm bore

By Andy

I believe that bike came with a 65.5mm bore from the factory, so you would just need to choose stock size before adding to your cart.

By Andy

Have a question? Please ask our experts and customers who own this product.

Wiseco Piston Kit 50.00mm

Select Your Vehicle - Fitment Guaranteed