2025 Yamaha YZ250F

 The 2025 Yamaha YZ250F features several updates aimed at enhancing performance and handling. Key changes include a revised cylinder head with improved intake and exhaust port shapes for better power delivery across the RPM range, alongside updated mapping for more refined throttle response and increased mid-range power. The bike also benefits from a new, more rigid frame that enhances stability and control, as well as a redesigned shock and fork settings for improved comfort and handling on rougher terrain. Additionally, the 2025 YZ250F gets a lighter, more compact airbox design to boost intake efficiency and reduce overall weight, while the aesthetics are updated with new graphics. These refinements ensure the YZ250F remains competitive and well-suited for serious off-road riders.

Fork Spring Rate Recommendations

• The 2025 Yamaha YZ250F stock fork spring rate is 4.7N  (0.48kg/mm) with a spring length of 498mm.
• The KYB SSS spring fork remains on the YZ250F since 2006.
• The 2025 Yamaha YZ250F KYB SSS Spring fork features updated stock settings compared to the 2024 Yamaha YZ250F KYB fork.

Weight references person in regular everyday casual cloths.
This chart accounts for the common additional weight of riding gear
This info relates to stock valving and modified valving

Shock Spring Rate Recommendations 

• The 2025 Yamaha YZ250F stock shock spring rate is 56N (5.7kg/mm) with a spring length of 275mm
• The KYB 16mm shock shaft with 50mm main piston remains on the YZ250F.
• For 2025 the Yamaha YZF shock features new settings and body revision compared to the 2024 Yamaha YZ250F.

Weight references person in regular everyday casual cloths.
This chart accounts for the common additional weight of riding gear
This info relates to stock valving and modified valving