lol well my son wanted more power for his mini he is 14 and his mini had a 5hp briggs on it. i said well i have a good short block bored .020 over with a flat top and i have a new head humm and a bored carb 16mm. well i put a factory muffler on it with a 8deg key and the carb is jetted with a air flilter adapter and filter. we straped it on his mini and wow! remember it still has stock springs and no gov. I cannot beleive the yank it has you cannot sit anywhere near the back of the seat or it will power slam you on your head. :thumbsup: lol i cannot understand why it makes so much lowend power. i wounder how much power it makes? and i still have some 18lb springs to go in it and a rlv pipe and a arc billet rod i swaped out of mine for the longer rod. but he has to get used to this monster first lol.