YFZ 450 04-13 (carb model) 100mm Big Bore Cylinder

Our 100mm big bore cylinders feature many innovative designs to create the most reliable and strongest cylinder on the market!
 
Proprietary cylinder machining increase gasket sealing to eliminate head gasket issues
 
Utilizes custom steel sleeve for maximum strength (steel is much stronger than aluminum cylinder with coatings. This is the reason all major auto manufactures have aluminum blocks with steel sleeves!!!!)
 
Designed with additional piston skirt support improving piston and cylinder wear
Built in clearance for large stroke cranks
 
Bolts on with no case modification
 
Better ring seal and less blow by results in more power
 
Excellent cooling characteristics for the most demanding racing situations
 
Last longer and is more reliable (no coatings to flake off)
 
Great option to fix damaged stock cylinders, and if sleeve becomes damaged a new one can be installed quickly
 
Retains 100% stock OEM look for a stealthy engine build
 
These cylinders are designed to work with our +3mm and +5mm cranks.