Modifying engine files

[rigo77]

Was looking to add gear ratios and carb options to the files. I had followed what is on the forum here but I get the kart.exe crashes. Can anyone post here which files need to be modified?

I am looking to spread the gear ratios for the mini60 to have a bit more options. Also, is it possible to re-configure the track width of the mini 60 to a max of 960mm at rear? Is the current setting on krp the standard? is there a difference between mini and cadet? I know there is in Rotax but am unsure for this class.

Anyways, we run Rotax here so would be nice to have the option to set up kart with a narrower track width specially since were also using mini tires which are smaller than the others.

Thanks in advance for input