Zipper's Performance 109-214 User Manual
Nitrous a ssisted d ry s ystem
Use your motorcycle's specific Service
Manual as a guide for any procedure not
detailed in these instructions.
This product is legal in California only for
racing vehicles which may never be used
upon a highway. Not legal for sale or use on
pollution controlled vehicles.
This kit is designed to be installed on stock
or modified Harley-Davidson® motorcycles.
This kit is not designed as a plug-and-play
system. Installation of this kit on any
modified or larger displacement engine will
require larger injectors and custom mapping.
This product and its required service must
be performed by an experienced high
performance tuner familiar with ThunderMax.
Oversize injectors should be sized for the
proper fuel flow at peak torque while
spraying the engine with Nitrous. You should
not proceed with installation and use of this
kit if you have limited skills using-altering-
If you are a professional tuner who
methodically reviews his work with a dyno to
assure you have stable Air/Fuel ratio while
spraying the engine, there should be no
reason why you cannot achieve success with
this product. Depending on your set up and
understanding of nitrous systems, damage
to your engine may be a real possibility.
Neither Zippers Performance Products nor
Thunder Heart Performance Corporation is
responsible for ANY consequential damage
related to the use of this product. There is
no warranty written or implied in any way
when using this product.
Nitrous oxide designed for vehicle use
should never be inhaled as it contains sulfur
dioxide which can cause death. Contact with
liquid nitrous may cause burns/frostbite.
Never vent nitrous oxide in a confined space.
Wear safety glasses and rubber gloves when
This product is sold as a 2-part kit, the main
component consisting of the air cleaner
backplate with solenoid assembly, air filter and
harness. The bottle/bottle mounting brackets are
sold separately and are model specific. This kit
also requires a ThunderMax ECM with Auto-
Tune system (sold separately). Please read
performing this installation.
How a ‘Dry’ System Works
A ‘dry’ system introduces the required extra fuel
nitrous demands through the EFI fuel injectors,
rather than using a secondary fuel delivery
programming built in it that recognizes the
nitrous system and increases the fuel ‘pulse
width’ and retards engine timing when activated.
Once additional fuel is introduced, it burns with
the extra oxygen provided by the nitrous,
providing additional power.
1. Remove seat, air cleaner cover, element and
backplate from the motorcycle. Retain the
original cover screw, breather bolts
hoses for future use.
2. Locate the supplied NADS harness and
arming switch. The female spade wire terminals
are marked with color codes; male spades are
switch. Connect to
switch in the following