The sport was actually "invented" in 1973 in a pub in Wisborough Green (not far from the town of Horsham) in West Sussex, England, UK, by a group of young men bemoaning the prohibitive costs of getting involved in any kind of motorsport. They formed the British Lawn Mower Racing Association, and shortly afterwards, a northern equivalent in the form of the North West Lawn Mower Racing Association was formed. The sport was taken to the United States by the makers of a petrol stabiliser called Sta-bil, who had visited the UK and witnessed a race meeting. It has since grown to have its own national organization called the U.S. Lawn Mower Racing Association.

Not very much compared to a motocross racer. The Factory riders are lucky to get between $50,000 and $100,000a year. Most riders get the majority of their money from sponsor endorsements.

This link should be able to help you:

http://www.g-team.us/

this link suks verry expensive

heres how you do it

get like a second hand mower that's kinda rough get a bigger mower engine if u want then you put on a k&n airfilter and put a powernow in the carb thoes are made for dirtbikes but anybody could mod it to fit in a mower. you could also put a jet kit in the carb and bore out the engine to give it more horse power then change the pully size if it is belt driven id say a 9 inch on the engine and a 2 inch on the tranny then install an easy gas petal or lever then put an open exhaust to make it as noisy as possible and give it a little more speed, lower it , you might want to got custom stering wheel or handle bars put racing tyrods in cause stock wont handle the abuse then get some racing rims and some racing tires then got it a nice paint job then that's it

LAwn Mower racing is a race when people get on lawn mowers and see which one goes faster and reaches the finish line first :)

get a smaller pulley for the engine. as far as clutch I'm not sure

No, Archimedes did not invent the lawn mower even though one of his attributed inventions paved the way for that invention 2,000-plus years later. The lawn mower invented by an English textile mill engineer in 1830 had the name Archimedean revolving cutter mower. The mower in question included a revolving screw-shaped blade inside a cylinder, considered the essential design of the Archimedean screw attributed to Archimedes' (287 B.C.-212 B.C.) inventiveness.

Horitonal or Vertical Output? Horsepower? Keyed with 1/2 moon or full slot shaft? Gear or v-drive system? to comparable ability to transfer power to wheel drive system.verticle.6.5. full slot shaft and gear its a push lawn mower