1st and 2nd gear are fun. 3rd is a big let down and when you dump it into 4th the party is over. If you do decide to go hpi it’s gonna lose all that wheelie power, the stock flywheel weights like 8 lbs vs 280g. I noticed a very large difference in the power delivery on mine, it kinda made 6th useless too. My ns50 with a ninja pipe, 19 carb and an hpi blows the doors off of my dt that I spent so many months trying to eek any power out of it. It is best stock, I would pick up an 1mm over bore piston and don’t fuck with it too much.