Well I should have listen to everyone - I was bored today and took off the Briggs 3.5hp motor & Put on the Predator 6.5hp motor and WOW what a difference. it totally hauls azzz now, whellie any time you want. I did have to remove the exhaust & air filter top cover to fit the motor - then reinstalled the exhaust upside down.. it works for now, I will be buying a upgrade kit soon (air filter/exhaust), too much power for a little kid now..lol pics soon.