Brian Crower BC1950 Dual Valve Spring Kit - Yamaha YXZ / Sidewinder / Arctic Cat XX

The Brian Crower BC1950 is a high-performance dual valve spring kit designed specifically for Yamaha YXZ 1000R (2016+), Yamaha Sidewinder (2016+), and Arctic Cat XX (2018+) applications. This premium valve train upgrade is engineered to support high-rpm performance builds and aggressive camshaft profiles.

Key Features:

• Dual spring design with outer spring free length of 1.572" and inner spring free length of 1.339"
• Seat pressure of 76 lbs at 1.265" installed height
• Open pressure of 192 lbs at 0.850" valve lift
• Manufactured from premium chrome silicone alloy wire by PAC Racing
• Precision wound for consistent spring pressures across the RPM range
• Includes chromoly steel retainers machined from premium 4140 steel
• Complete kit includes steel valve spring seats for proper installation

The BC1950 valve spring kit is ideal for upgraded camshaft applications and engines targeting higher RPM limits. The dual spring configuration provides superior valve control and resistance to valve float compared to stock springs, making it an essential upgrade for performance-oriented UTV and snowmobile builds. Brian Crower valve springs undergo proprietary processing procedures to ensure reliability and longevity in demanding racing and high-performance environments.