( Installation Guide (Manic Mechanic Intake)
(CNS Carburetor)
For all others follow steps 1, 2, 3, 6
You will need:
10mm & 14mm open end wrenches…4mm Allen wrench (CNS), 5mm Allen wrench for all others…Gasket material
(Available at auto parts stores), do not use cork!...Scissors…Box cutter or hobby knife…Hacksaw or grinder with
cut-off wheel…Pliers to remove factory intake mounting studs.
1) Remove stock intake using a 10mm open end wrench. Remove the mounting studs.
2) The original gasket partly blocks the intake port. Make a new gasket by tracing around the
intake. Include the holes, but leave the port blank for now.
3) Using the supplied screws, attach the intake with gasket to the cylinder. Get the bolts snug.
Remove the intake. There will now be an imprint of the port on the new gasket. Carefully cut
out the material for the port opening.
4) Attach the intake. Be careful not to loose the supplied machine screws, (CNS)…they have been
machined, and are not available at hardware stores.
5) Replace the original Phillips head screw with the supplied socket head cap screw.
6) Remove the clutch cable stanchion and modify if necessary per the note below. The clutch
cable stanchion must be threaded into the engine case far enough to clear the fuel bowl of the
carburetor. DO NOT attempt to thread a long stanchion deep into the case! See note below.
Note:
Some engines are shipped with a clutch cable
stanchion that is threaded approximately 5/16”
under the hex nut. Some are shipped with a longer
threaded portion, approximately 5/8”. If you have
the longer cable stanchion, you will need to cut
1/4"-5/16” of the threaded portion off with a
hacksaw. Leave the nut in-place so that it can be
used to clean the threads prior to re-installation.
When finished cutting, simply pass the nut over the
cut portion to remove any burrs. Then thread it
back into the engine case.
7) Check to ensure that the intake seal is installed, and positioned correctly prior to attaching the
carburetor. The seal lip should face towards the intake.
8) Push the carburetor, firmly, onto the intake. Make sure that the register at the end of the
intake has engaged with the rubber seal shown in the photo below. Tighten the screw using a
4mm Allen wrench. When tightening you will feel a bit of spring for several turns. Once the
spring action stops, the screw will become hard to turn. At this point the carburetor is
sufficiently attached to the intake. There is no need to over tighten the screw.
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