Demon Fuel Systems 421441 - Manual (Page 2)

2
You will need the following tools to help with the installation:

Small Hammer

Small Drift (punch)

3/32" Allen Wrench

9/64" Allen Wrench

T15 Torx Driver

.316 Diameter Drill

Needle Nose Pliers

Small Flat Blade Screw Driver

#2 Phillips Head Screw Driver

Small File
INSTALLATION
1.
Remove the carburetor from the vehicle and drain any fuel into a “fuel safe” container.
2. If your carburetor is a Speed Demon ™ Twin Squirter (mechanical secondary), it is equipped with a slotted
screw to control the secondary butterfly position. This must be changed to the #10-32 x .38 set screw
included with the kit (if you do not, the linkage can bind). This will require you to reset the secondary
throttle shaft. Set the secondary butterflies to the bottom of the transfer slot so you cannot see any of the
slot at idle (butterflies closed), but with any movement of the secondary butterflies you will begin to see the
slot. (Refer to the Demon
™ carburetor instruction manual for further information.)
Figure 2 Figure 3
3. Using a small drift pin punch, knock out the sealing slug on the right side of the choke horn in the main
body. It is precut at the factory and should press out very easily. Once you’ve removed the slug, deburr the
hole to make sure the choke rod doesn’t bind or hang.
Figure 4