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Item #:
79871339
WSM Piston Kit, 0.25mm Oversized to 73.25mm Bore
Item #:
79871339
NZD 167
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
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In stock
Imported from USA store
QTY:
Only 5 items left in stock.
Order now and get it around Saturday, September 12
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High performance forged pistons coated with MOS2 for superior heat absorption.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Precision Engineering
Manufactured for exact specifications, this piston kit ensures optimal fit and performance, enhancing engine efficiency compared to standard pistons.
Increased Bore Size
The 0.25mm oversized design allows for improved airflow and combustion, boosting power output for performance enthusiasts seeking more from their engines.
Durable Materials
Crafted from high-quality materials, this piston kit withstands high temperatures and pressures, ensuring long-lasting reliability and reduced risk of wear in demanding conditions.
Product Details
Product Technical Details
| Manufacturer | WSM |
| Brand | WSM |
| Item Weight | 15.2 ounces |
| Product Dimensions | 3.8 x 4.5 x 3.7 inches |
| Manufacturer Part Number | 010-840-04PK |
Who Should Buy?
-
Performance Enthusiasts
Ideal for riders looking to enhance engine performance with a precise oversized piston kit.
-
Engine Rebuilders
Perfect for professionals or DIY mechanics replacing pistons in older engines requiring standard bore specifications.
-
Custom Projects
Great fit for custom builds where slight bore adjustments cater to increased power demands.
-
Beginner Mechanics
Not suitable for novice users lacking engine rebuilding experience to ensure proper installation and outcomes.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the coating on the pistons?
Answer: The pistons are coated with MOS2 for high performance and heat absorption. -
Question:
Where are the pistons made?
Answer: The pistons are made in Germany. -
Question:
How many piston categories are available?
Answer: There are four piston categories available: standard, big bore, 5mm long rod, and big bore with 5mm long rod.
WSM Pistons & Pins Editorial Review
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Customer Reviews & Ratings
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Ranee
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“Paint ordered from USA, u buy got the product to me in New Zealand in approx a week”
22 July 2026 · via Trustpilot
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24 June 2026 · via Trustpilot
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Dneah
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“Product came earlier than expected (shipped from US to NZ), in about 3 weeks. No damages and product was exactly as advertised!”
15-Jul-26 · via Trustpilot
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Tania
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“Easy to order, easy to track and the product is great to use. Also, the person-to-person (not automated) phone call I got to confirm that I'd received the item was wonderful ??”
11-Jul-26 · via Trustpilot
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NZD 167
Order now and get it around Saturday, September 12
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 5 items left in stock.
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
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Fastest cross-border delivery
Features & Benefits
- Competitively forged pistons
- Coated with MOS2 for high performance and heat absorption
- Ported to match WSM Banshee sleeves
- Four piston categories available
- Piston pin is 5mm higher on long rod pistons
- Made in Germany
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