How fast is a 250 cc quad go?

What is better 400ex or 450r? Does keihen carb work on kmx 125 its of a cr 125 97 model? What HP is 318cc? What valve clearance of kawasaki boxer ct150? What size socket fits ngk cr9eh-9? How do you clean the carburetor on a 2002 Honda vlx 600? Where is the VIN on a 250cc arctic cat ATV? Your 91 1500 goldwing seems to get only 22 to 24 mpg what can you do to increase performance what should the mpg be? How much oil does arctic cat 366 need? How do you adjust idle speed on 1986 Honda 250 4 wheeler? How much hp in 547 cc Briggs engine? What is the spark plug gap for 1996 Yamaha XV 535 Virago? What vehicles does Harley Davidson make? How do you change a starter clutch in a 1981 Yamaha seca? What does starter relay control on a ATV? What is the Spark plug gap on a 1980 Suzuki GS550L using NGK B8ES plugs? How do you make an ATV street legal in Mississippi? Is Murray the same as mtd? How do you adjust the oil injection system on a Yamaha blaster? My Yamaha at times it backfire from the carburetor and exhaust turning yellow?