Kibblewhite intake valves are a great upgrade from your O.E.M. motorcycle valves due to their superior performance and outstanding reliability. All KPMI Black Diamond stainless steel valves are impregnated by a special German process to a depth of 0.002", with a surface build up of 0.0002". This "Black Diamond" process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested on Kibblewhites computerized flow bench. Black Diamond Valves are light, strong, one-piece forgings with profiles that provide excellent flow characteristics and will outlast titanium valves.Detailed Specifications: Type: Valve, intake, Black Diamond. Material: Stainless steel. Quantity: 1. Head diameter: 1.418" / 36.00 mm. Stem diameter: 0.2155". Tulip: 20. Overall length: 3.210". Remarks: Standard head diameter. Notes: Kibblewhite valves are sold individually. You must use KPMI Spring Kit 60-60700 when installing Black Diamond valves.
"I ride a crf 250, I am currently on my 3rd set of valves and 2nd head. 2 of the 3 sets of valves were kibblewhite with KB springs. After breaking these in they don't move and are extremely tough. I ride my rev limiter a lot when I am racing, and these take the abuse without missing a lick. I cannot say enough good about these valves. Unless you are a pro you will get plenty of use out of these before your next valve job."
The Bridgestone M404 tire is trusted by the most affluent motocross racers like James Stewart that are able to push their bikes to the limit thanks to these newly designed tires. Bridgestone gives corner confidence with the M404 rear tire that features an upgraded tread design to provide better slide control when exiting the corner, allowing more throttle. The M404 rear tire is Bridgestone's most versatile tire thanks to their combination of better rubber compound and tread pattern. A fresh fine-tuned casing construction on the Bridgestone M404 rear tire increases the durability.
"I Purchased this tire in place of a 756 rear. One of its most outstanding features is its durability, this one lasted me 5 races without showing signs of wear. Now that it is showing wear the lugs have a tendancy to chunk as opposed to rounding off. I have rode on a variety of tracks with this tire. On sand it tracks strait and you can did a trench with it. I did not have a sand tire to compare it against. Clay with fluff on top the tire did ok, but suffered severally in the turns. Intermediate it does well all around, settled into the corners without to much skirting when you are on the trottle. Overall this tire handles soft to intermediate surfaces very reliably and without any surprises"