Although it's only about 1/2 the power of a V-Spec. But the 21TM is really all you need in a Revo. With a 21TM and a good pipe (I ran a THS in mine) You can really get that thing movin'. I run a V-Spec in my Truggy and Buggy and Dayum! It's a rocket.
Is the .21 v spec a drop in motor and can i put a pull start on it. I would like to put a .26 max on it but i want more control of the car. Also what about the picco .21?
V-specs are bump-start only. They are WAY too much engine for a Revo.
A well tuned 18TM or TZ, 21TM with a THS pipe is all you need.
I had to back off my slipper a lot to keep from stripping tranny gears.