Unlike to competition Fiala enables you to swap coil pack systems "on the fly".
Remove the carb, loosen a few bolts and you are done.
Make sure to order a new "Fiala 250 Coil Set connector and seal" set with it
Technical Dimensions
CLICK HERE
SETUP GUIDE by DR.G
DR.G's GUIDE TO CARBURETOR BUTTERFLY TRAVEL, THROTTLE SERVO SPEED, ADJUSTING THE CARBURETOR NEEDLES