The Sparks Racing 480cc Big Bore Cylinder Kit is the most cost effective way to get more power out of your YFZ 450 R/X engine. This kit is a simple bolt-on option for anyone looking to increase the performance of their YFZ while running premium pump fuel. The enlarged aftermarket cylinder is designed to alleviate all the common problem associated with boring and re-plating the stock cylinder.
Note: Anytime drastic changes in engine size are made on EFI bikes, revised tuning is required. We do offer fuel maps for the Dynatek Fusion and Dynojet Power Commander V, but you must have all the components we tune for in order for our maps to work
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Each Kit Includes:
98mm Cylinder
98mm 12:1 Piston Kit
Head gasket and base gasket
Price $854.95
Buy At http://www.sparksracing.com
