Alba Racing light weight racing valve spring kit for YXZ1000R. This is a vital modification for a reliable valve train. For high rpm and or boost these are a must. These are available with titanium or chromoly retainers. We recommend the Chromoly kit for most customers as they last longer and do not cause valve train wear like the titanium ones. With titanium retainers you will need to replace buckets about every 1000 miles as the titanium is very hard on them. There is no performance gains with using the titanium retainers so we do not recommend them. But some people just have to have titanium so we offer it.