the failure is an easy fix...
The air pressure forces the wat/meth along the throttle valve stem and into the electronics portion...To fix: just pop the cover and gently rub down the circuit board with rubbing alcohol and allow to dry. The wat/meth cause some corrosion of the contacts on the board depending on mixture and other times the contacts are just wet.
IF this does not work then go to a junkyard and get another circuit board (its part of the cover) and pop that on. Much cheaper than buying a whole new throttle body.
Now dont let all this discourage you. it's a 5min fix and it happens after a LONG time of using meth...usually happened to me every 3~4months and i was running about 1100cc at full spray