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R&D Valve Spring Kit Chromoly Retainers - Honda XR650R - .420 LIFT

Availability: In stock

$223.60

Quick Overview

R&D Valve Spring Kits

Details

R&D Valve Spring Kit with Chromoly Retainers up to .420 lift for XR650R

The hottest part of an engine is its cylinder head where the valves operate under extreme heat. Being enclosed in an airtight chamber, they depend upon oil circulation to dissipate heat. Clean oil cools best, which is one reason why we recommend changing your oil every 200 miles. But even at its cleanest, oil is still not an ideal coolant.

Stock Honda valve springs work well enough when you bike is new, but heat quickly corrupts their structural integrity and softens the springs, allowing the valves to bounce, which leads to mushrooming that leads to tappet and cam lob wear. At that point, performance drops dramatically.

The cure for this common problem is not necessarily stiffer but better quality springs. Our silicon-chrome wire springs are designed to provide superior heat resistance, therefore perform extremely well in high temperature atmospheres. In conjunction with stock or high performance cams, these silicon-chrome valve springs provide consistent valve movement that cranks up horsepower, eliminates float and reduces wear.

Additional Information

Manufacturer R&D Springs
Part Number RD271H