Honda CRF450R Racing Valve Spring Kit – KPMI (30-31600)

Unlock your CRF450R’s full potential with the KPMI® Racing Valve Spring Kit, designed for precision, durability, and high-RPM performance. Each spring is crafted from Kobe Super-Clean Chrome Silicon Wire and engineered using advanced design simulation to deliver race-ready reliability under extreme conditions.

✅ What’s Included

• Complete valve spring set (intake and exhaust)

• Lightweight heat-treated steel retainers

• Designed for compatibility with OEM integrated seal/base (OE# 3610212)

📦 Fitment

• 2013 – 2016 Honda CRF450R

Direct drop-in upgrade for OEM cylinder heads — no machining required.

🛡️ Warranty Info

• Manufacturer warranty against defects in materials and workmanship

• Precision-engineered in the USA

• Suitable for both stock and high-performance racing builds

🔑 Key Features

• Premium Kobe Super-Clean Chrome Silicon Wire for ultimate fatigue resistance

• 80 lbs seat pressure / 205 lbs @ 0.435” lift (max)

• Heat-treated, stress-relieved, and shot-peened for maximum life

• Optimized harmonics and spring rate balance for smooth, reliable valve motion

• Beehive spring design with lightweight retainers for reduced mass and improved throttle response

• Ideal for high-RPM and boosted performance applications

💲 Price & SKU

Price: $207.95
SKU / Part Number: 191-21015 | KPMI 30-31600
Estimated Shipping Weight: 0.51 lbs
Handling Time: Ships Next Business Day