do you mean the minimum weight of the MOWchine has to be 575 lbs ?
if so what you are doing is differant from what most of the racers are trying to do , i have my mower down to around 200 lbs and the heavier mowchines in the group i run with are probable around 350 lbs , the lighter they are the faster they will go .
if you are looking for the heavy mowchines you should look for the older John Deeres and Cubs or the old simplicity and wheel horse mowchines are pretty heavy .
I was wondering why, if i understand you right, you would what a heavy mowchine ??
i was also wondering if you have many racers down by were you live ??
As a local chapter of the USLMRA , we here in WI (
www.WILMRA.com )
have a group of around 50 or mower racers that show up at almost every one of our races .
I saw that youare thinking abought coming up to check us out in Prentice ,
if you make it up make sure you look up the LAWNMONKEY ,I'm not to hard to find most of the time , i would be mower than happy to take you around and interduce you to all of our racers and answer any questions that you might have !!!!!! HOPE TO SEE YA THERE !!!!!!!!