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U.F.O.
(Ultimate Flow
Optimizer) PATENTED

The UFO is a simple, trouble
free, aerodynamic piece that fits Mikuni carburetors from 30 mm
through 44 mm. The UFO makes a normal round slide carburetor
out-perform the more expensive flat slide carburetor by
eliminating turbulence and increasing air flow and velocity,
creating a highly atomized fuel charge. Normal gains are 3/4 to 1
HP per 100 cc of engine displacement on 4 stroke engines and 1 1/2 to 2 HP per
100cc of engine displacement on 2 stroke engines. (Minimal rejetting and tuning are
required).
* More horsepower with less fuel
* Broader power band
* Explosive throttle response
* Superior fuel atomization
* Less sensitive to temperature, altitude and jetting changes
* Cleaner emissions
* Cooler running engine
Air
Bleed Tuning Information
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U.F.O. Air / Fuel Flow
Diagram
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Without the U.F.O., the air
hits the forward wall of the slide
cavity
creating a rolling air turbulence which forces the
poorly atomized fuel droplets
to the lower portion of the carb bore resulting in poor fuel atomization and
poor performance.
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With the
aerodynamic U.F.O. filling the slide cavity, the rolling air turbulence is
eliminated. The higher velocity air flow pulls the fuel further up the needle
and higher in the carburetor bore resulting in superior fuel atomization.
This means more HP, quicker throttle response, improved fuel economy and a
cooler running engine.
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Gain up to 7hp on your
Banshee
Install UFO's on your Banshee and
gain 5.25hp to 7hp. The maximum gains will be in low end and
midrange with modest gains on top end. This is the biggest bang
for the buck that's available (5.25hp gain on stock Banshee and 7hp gain
with slight mods).
2628 - Yamaha Banshee carbs and (slide ID 24mm)
3234 - Most 30 mm and all 32 through 34 mm carbs (slide ID 32.2mm)
3600 - 36 mm carbs with slide ID of 35mm (Ski-Doo snowmobile and many motorcycle)
3638 - 36mm carbs with slide ID of 36mm and ALL 38mm carbs
4044 - 40 through 44 mm carbs
The
Majority of all applications require a 3.5 UFO Cut-away piece.
This is what is included in all kits as ordered.
When installing UFOs, the pilot
jet must be reduced substantially (usually about 50%, sometimes even
more). Most installations end up with a 3.5 UFO and a #17.5 or #20
pilot jet. These sizes are usually difficult to find locally.
Thunder Products has all sizes in stock for $4.00 each. List your
vehicle make, model and modifications in the special instruction box and
we can give you a suggested size based upon our experience. Or if
you know what size you want, list that in the special instruction box
and add the number of jets needed to your cart.
Pilot Jets
Idle Screw - Extra long idle screw for 40-44mm
VM round slide Carburetors

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