well on my go kart i put on tall narrow tires. the size was 13.5 john deere lawn mower tires. it helped. on my ride, my carbuerator has 3 screws,for gas,air,and idle. idle- top air- middlegas- bottom...
if you have a baffel on your muffler( it is a metal plate in your muffler for less noise) you can take off to make it go 3-6 mph faster. you can buy a bitubo egzaust witch is about $85 bucks and...