• 40mm Piston Assembly Kit for 2-Stroke 50cc Jog Scooter Moped - goofitmoto
  • 40mm Piston Assembly Kit for 2-Stroke 50cc Jog Scooter Moped - goofitmoto
  • 40mm Piston Assembly Kit for 2-Stroke 50cc Jog Scooter Moped - goofitmoto
  • 40mm Piston Assembly Kit for 2-Stroke 50cc Jog Scooter Moped - goofitmoto
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GOOFIT

40mm Piston Assembly Kit for 2-Stroke 50cc Jog Scooter Moped

40mm Piston Assembly Kit for 2-Stroke 50cc Jog Scooter Moped

$10.99
$10.99
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Product Overview

This 40mm Piston Assembly Kit is a high-performance top-end rebuild solution for 2-stroke 50cc engines. Specifically engineered for the Jog and Y-Zinger platforms (1994-2015), it features a high-compression design to restore engine power, improve fuel economy, and ensure a smooth riding experience for both daily commuting and light modifications.

Product Compatibility

Designed for 2-stroke 50cc Minarelli-style engines and specific Yamaha-clone models.

Vehicle Type Compatible Years/Models
Scooter / Moped Yamaha Jog 50, 1E40QMB Engines (1994-2015)
Dirt Bike Yamaha Y-Zinger 50, PW50 Replicas
Compatible Brands TaoTao, Roketa, Jonway, VIP, Peace Sports (2-Stroke Models)
Fitment Note Fits standard 40mm bore; NOT a replacement for Honda NC50

Specifications

Component Metric Measurement Imperial Measurement
Piston Diameter 40mm 1.57"
Piston Height 50mm 1.96"
Piston Pin Outer Diameter 10mm 0.39"
Piston Pin Length 33mm 1.29"
Engine Type 2-Stroke --

Key Features

  • High-Strength Material: Crafted from premium alloys with excellent abrasion and high-temperature resistance, ensuring stability under high-speed operation.
  • Precision Sealing: Includes precision-machined piston rings and pins that provide an airtight seal and optimal lubrication to extend engine service life.
  • Enhanced Compression Ratio: Optimized geometry increases combustion efficiency, delivering a noticeable boost in power output and throttle response.
  • Reliable Thermal Management: Designed to maintain structural integrity in extreme heat environments, preventing piston seizure and wear.
  • Full Installation Kit: Comes complete with 1x Piston, 3x Piston Rings, 1x Wrist Pin, and 2x Circlips for a comprehensive top-end overhaul.
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Fitment FAQ

Will this part fit my specific model and year?

This cylinder piston kit is intended for Designed for 2-stroke 50cc Minarelli-style engines and specific Yamaha-clone models.; Vehicle Type; Compatible Years/Models; Scooter / Moped; Yamaha Jog 50, 1E40QMB Engines (1994-2015); Dirt Bike; Yamaha Y-Zinger 50, PW50 Replicas. It is best matched to original part number(s) 1994-2015. Key physical/spec details from the product data include Fits standard 40mm bore; NOT a replacement for Honda NC50, Piston Diameter: 40mm, Piston Height: 50mm. Use the compatibility table and product photos together before ordering.

Do I need to match the OEM part number?

Yes. Match your original part number to 1994-2015 before purchase. For this cylinder piston kit, also compare the bore diameter, piston-pin size, gasket pattern, stud spacing, engine code, stroke type, and cylinder height. This is especially important for Yamaha PW50 models because similar model names can use different parts by year or trim.

What models or situations does this part not fit?

Do not order this cylinder piston kit for machines outside the listed compatibility, or for units with different bore sizes, piston-pin diameters, stroke lengths, stud spacing, or gasket patterns. If your original part number does not cross-reference with 1994-2015, treat the fitment as unconfirmed. Model years outside 1994–2015, 1994, 2015 should be verified separately. Do not rely only on the model name or engine size.

What should I check before ordering?

Before ordering, compare your original part with the photos and check the bore diameter, piston-pin size, gasket pattern, stud spacing, engine code, stroke type, and cylinder height. Confirm OEM/cross-reference number(s): 1994-2015. Recheck listed specs such as Fits standard 40mm bore; NOT a replacement for Honda NC50, Piston Diameter: 40mm, Piston Height: 50mm. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.