The Dirt Quad's original 24 Volt motor has been successfully been overvolted to 36 Volts by many people. We always like to warn people that overvolting a motor could cause it to burn out if it was used under demanding conditions such as in deep sand or for extended uphill riding.
We have not created a 36 Volt conversion kit specifically for the Razor Dirt Quad yet however that is definitely something that we would like to do.
We do not have a Dirt Quad in the shop right now to measure what size 36 Volt battery pack will fit in it though. Do you know what size (Ah rating) of batteries will fit in the quad and you would like included with the kit?
Please let us know if you have any questions.