Engineers pay special attention to cam and spring harmonics, stress, mass and operating rpm. Established in 2000 as a small local shop in Southern California, we believed in excellent service then and nothing has changed now. In 2003 we forged the unknown by growing online. We specialize in powersports parts and accessories. For superior selection & service!Sign up today to receive special insider notifications of deals, promotions, and new items! The item "Honda CRF450R 09-12 Kibblewhite Racing Valve Spring Kit 0.440 Lift 30-31250" is in sale since Thursday, April 13, 2017. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Other Engines & Engine Parts". The seller is "fatmansparts" and is located in Lake Elsinore, California. This item can be shipped worldwide.