Namura Forged Piston Kit
1027-6530 (MFG #: FX-10046)
$269.99
Sale price
$269.99
Regular price
$269.99
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Namura Forged Piston Kit for Yamaha YZ250 Dirt Bike
Namura Forged Piston Kit for Yamaha YZ250 Dirt Bike
$269.99
Sale price
$269.99
Regular price
$269.99
SKU:1027-6530
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Description
Namura pistons are made to exact OEM specifications and are direct replacements for OEM pistons with no modifications or dimensional adjustments needed.
Technical Specifications
- MFG. Part Number FX-10046
Vehicle Information
Yamaha YZ250 Dirt Bike (1974-2026)
The Yamaha YZ250, a legendary two-stroke motocross race bike, has been a dominant force on tracks worldwide since its introduction in 1974 and remains in production through 2026. This iconic model has continuously evolved, adapting to the demands of competitive racing while maintaining its core identity as a high-performance 250cc two-stroke. Over its extensive lifespan, the YZ250 has undergone several significant transformations. Initially, from 1974 to 1981, it featured an air-cooled engine. A major technological leap occurred in 1982 with the introduction of a liquid-cooled engine and the innovative Yamaha Power Valve System (YPVS). Further engine refinements in 1999 adjusted bore and stroke for improved low-end torque. Chassis advancements were equally crucial, notably the shift to a lightweight aluminum frame in 2005 and the adoption of KYB Speed-Sensitive System (SSS) front forks in 2006, which are still highly regarded. Beyond the standard motocross model, Yamaha introduced the off-road focused YZ250X in 2016 and offers special editions like the 70th Anniversary and Monster Energy liveries for 2026. Q: How do I find parts for my specific Yamaha YZ250 model year?
A: To ensure a guaranteed fit, please use the year and edition selector at the top of this page.
Maintenance
| Component | Interval | Details |
| Transmission Oil | 5 to 10 hours (aggressive/race-level use) or 10 to 15 hours (recreational use) | The YZ250 is a two-stroke engine; transmission oil is separate from the fuel/engine oil mixture. Capacity of 0.75 L for recent models. |
| Transmission Oil Filter | Inspect and replace as needed with each transmission oil change | Manuals do not always detail a specific interval, but regular inspection is recommended. |
| Belt | Not applicable | The Yamaha YZ250 uses a chain for its final drive, not a belt. |
| Spark Plug | Inspect regularly | Check spark plug condition during regular maintenance. |
| Air Filter | 5 hours (aggressive/race-level use) or 15 hours (recreational use) | Clean or replace more frequently in dusty conditions. |
| Coolant | Inspect level regularly | Check coolant level before each use and top up if necessary. |
Maintenance intervals can vary by model year and riding conditions (recreational or race-level). It is essential to consult your vehicle's official owner's manual for the most accurate information.