Specifications Hign-concerned Chemical:None Item Length:0inch Displacement (ml):450 No. of Cylinders:1 Cylinder Special Features:Direct replacement of original parts Item Diameter:9.5cm Item Weight:1.4kg Item Height:0inch Item Width:0inch External Testing Certification:iso9001 Model Name:YZ450 F WR450 WR YZ YFZ 450 2S2-11311-11-00 -20-00 30-00- Brand Name:Road Passion Item Type:engines Material:Cast iron / ceramic surface cylinder Wefocusontheproductionofvarioustypesofmotorcycleaccessories,fromtinypartstolargeandheavypartsthatcanbepurchasedandused. Why our cylinders are of good quality? The service life of a high-performance engine is as high as 100,000 to 150,000km, because the inner wall of the cylinder is coated with a layer of high-performance ceramic composite material, and a layer of Ni-SiC composite ceramic film is deposited on the inner wall of the cylinder. The diameter of the ceramic particles that penetrate the inner wall of the cylinder is only 0.3m. Compact, high surface roughness precision, friction coefficient is only 0.06 ~ 0.082. The coating has comprehensive properties such as high temperature resistance, corrosion resistance, self-lubricating, high strength, and high wear resistance. Brandname RoadPassion Producttype Cylinder Block MaterialType: Cast iron Condition Directreplacementsfortheoriginalparts Quantity: 1 Pc Note: Instruction of Installation is NOT Included Applicable Models: For Yamaha YZ450F 2006-2009 For Yamaha WR450F 2007-2015 For Yamaha YFZ450 YFZ450R 2009-2018 Ifyoudonotfindthepartsyouwant oryourmotorcyclemodelinourshop, please andwewillsearchforyou.