6.5T motor in RC10B4?
 

Hello, as I'm getting this buggy soon so I wonder if this motor will rip the gearbox in shreds or not with this motor's full 100% throttle power?

The B4 will easily cope with that system! infact itl cope with a 5.5, possibly start to strain more at the 4.5 level, but im sure it'd still cope with a careful build!

The B4 is a strong car, enjoy it :)

A 6.5 T in a B4 is fine, lots of people have this, including me. I use 18T/81 T, others use 23T/81T gearing. On the xcelorin speedo, you can set the initial acceleration to medium if like. It will help you get used to it.

Cheers. ;)