CYLINDER KIT 40.00mm STD ALL YEARS YAMAHA PW QT 50 WITH STUDS & NUTS 4J2-11311-00-00
4.1 Trustpilot 99.9% positive on eBay
Delivery to United States 5–8 business days
Spread the cost with
Complete standard-bore 40.00 mm top-end rebuild kit for Yamaha PW50 and QT50 two-stroke models. Includes cylinder, cylinder head, piston assembly, rings, gaskets, spark plug, studs, and nuts. Designed as a direct OEM replacement to restore a worn or damaged cylinder assembly. Standard bore is 40.00 mm. Kit contains 1 x cylinder, 1 x cylinder head, 1 x piston, 1 x piston pin, 1 x bearing, 2 x circlips, 2 x piston rings, 1 x head gasket, 1 x base gasket, 1 x spark plug, 4 x cylinder studs, and 4 x stud nuts. Cross-reference OEM part numbers include 4J2-11311-00-00, 4J2-11311-01-00, 4J2-11111-00-00, 517-11181-01-00, 3PT-11351-00-00, 95380-06600-00, 93310-210M0-00, and BP4-HS000-00-00. Manufacturer: Dirt Racing.
- SKU
- 56-K201.40.KIT-B
- Brand
- Dirt Racing
- Availability
- In Stock (9)
- General Product Group
- Engine
- General Product Type
- Cylinder Kits
- Variant Id
- 300541
FULL DESCRIPTION
Yamaha PW50 QT50 40.00mm Standard Bore Cylinder Kit with Studs & Nuts
Restore your Yamaha PW50 or QT50's engine to peak performance with this complete 40.00mm standard bore top-end rebuild kit. Designed as a direct OEM replacement, this kit includes all the essential components needed to overhaul a worn or damaged cylinder assembly. Manufactured to exacting standards, it meets or exceeds original equipment quality, offering a cost-effective solution for your motorcycle.
Key Features:
- Direct replacement for the existing cylinder assembly.
- Comprehensive top-end rebuild kit.
- Manufactured to exacting standards for reliability.
- Meets or exceeds OEM quality specifications.
- Provides a cost-effective replacement solution.
- Includes essential studs and nuts for installation.
Included Components:
- Standard Bore Cylinder: 40.00 mm
- Cylinder Head
- Piston Assembly
- Piston Pin
- Small-End Bearing
- Circlips (x2)
- Piston Rings (x2)
- Head Gasket
- Base Gasket
- Spark Plug
- Cylinder Studs (x4)
- Stud Nuts (x4)
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).
Call or email us with your make, model and year and we will check it for you before you order.
Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.


