Wiseco KTM50SX 09-18/TC5017-19 ProLite 1555CS Piston Kit

SKU: WIS874M03950

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports...

Wiseco

Wiseco KTM50SX 09-18/TC5017-19 ProLite 1555CS Piston Kit

SKU: WIS874M03950

Powersports Piston and Ring Kits

WIS Piston Sets - Powersports...

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

We accept

Description

Wiseco's Pro-Lite is the forged 2-stroke piston that started it all! Wiseco Pro-Lite forged 2-stroke pistons are the result of decades of experience, incorporating the latest in 2-stroke piston manufacturing and design in a part built for all-purpose 2-stroke riding. Designed to offer great value, great reliability, and great performance, Pro-Lite is the staple of 2-stoke pistons!

Part Type

Engine Piston

Data: v4.2 - Upd: 2026-09-30 17:38:12

Features

39.50 mm Bore
Dedicated forging design for strength-to-weight optimization
Designed for all-purpose 2-stroke riding
Engineered, forged, and machined in the USA in Mentor, OH
Extra lightening operations for enhanced throttle response
Great value for reliable fun factor
High-quality ring(s), wrist pin(s), and circlips included
Refreshed performance from the track to the trail

Specifications

Product Attributes - Brand: Wiseco
Product Attributes - Manufacturer's Part Number: 874M03950
Product Attributes - Part Type: Powersports Piston and Ring Kits
Product Attributes - Product Line: Wiseco Powersports Pro-Lite Piston Kits
Product Attributes - UPC: 00193564137838
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Bore (mm): 39.500mm
Product Attributes - Stroke: 40.00mm
Product Attributes - Wrist Pin Style: Floating
Product Attributes - Pin Diameter (in.): 0.472 in.
Product Attributes - Wrist Pin Retainers Included: Yes
Product Attributes - Top Ring Thickness: 1.0mm
Product Attributes - Top Ring Material: Steel
Product Attributes - Top Ring Facing Material: Chrome
Product Attributes - File Fit: No
Product Attributes - Gapless: No
Product Attributes - Gaskets Included: No
Product Attributes - Quantity: Sold as a kit.

Reference Information

Brand Name/s	Wiseco
StreetFX SKU	wis874M03950
SFX Item ID	4068033
Supplier Item Code	4068033
Manufacturer SKU	874M03950
Manufacturer UPC	193564137838
Alternative References	KTM50SX, 09-18/TC5017-19, 1555CS