You wont ever need a more powerful buggy. The Hyper 7 is a proven winner..if you decide to race seriously you may want something a little lighter, but you will love the Hyper...Here are a few tips to keeping it fast and strong.
Don't neglect your shocks, and diffs...They need to be cleaned out and rebuilt every gallon of fuel.. The diffs come with grease inside them...take them apart and fill with Diff oil.. Put 5000 in the front 7000 in the middle, and 2000 in the rear
Check all the bearings every gallon of fuel..make sure they are not gritty, and that they spin smoothly with no noise...change them every 2 gallons or so, they are only $1 each..
Make sure you keep an eye on your clutch shoes..they will wear out..Check them every quart of fuel (8 tanks) replace when needed. Learn how to meash your gears!! You do not ever want any metal moving objects to be to close, or too far away from each other!
KEEP YOUR AIR FILTER CLEAN!!!!!
When you are ready to drop a racing engine in the Hyper it will have all the speed and power you will ever need.
Have fun, and good luck...I bashed and Raced the Hyper 7 for 4 years and loved everything about it!!