I have a DRZ e with an electric boot and an aftermarket kicker.
The following might be useful/ contradictory.
*I’ve found it’s a real b!tch to bump it.
*Once you’ve got the technique, kicking it is straight forward
*I prefer the electric boot over the kicker, in fact I bought the drz over the xr4, cos the xr4 is kick only (I known about aftermarket lekkie kits for the xr
) Coincidentally, my DRZ had a kicker kit already installed when I bought it
*When really mudplugging the bike does overheat, despite using water-wetter in the rad. I just stop for 10 mins and ride on and remember to top up the rad fluid when the bike is cold.
*When riding “normal” trails or liaising between trails, I’ve never overheated the engine.
*If I could be bothered to get round to it (and had the skills) I’d try to fit a fan to the rad.