Hi. I have a MTD with the infamous vari-drive, but unless I find a 5 speed locally I'll probably just play with what I have. It is a father son project so I'm not looking to make it go too fast. I was curious if anyone has tried a pulley swap on a vari-drive and how well it worked out? Goal is 20mph, but honestly if I can get 15 out of it I would be happy for now. Before anyone goes no about safety, yes it is getting a rear disc and direct steering before attempting to make it faster. Thanks!