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Superior Performance Products
for Snowmobiles, Motorcycles,
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U.F.O.
Get
ready for throttle response you never knew existed! The UFO is a simple, trouble
free, aerodynamic piece that fits VM 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
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 (5.25hp gain on stock Banshee and more on a modified Banshee). Only $35.00 per carburetor. ** See below for Pilot Jet information!! 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. **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
UFO and Dial-A-Jet We are frequently asked how or if the UFO works with a Dial-A-Jet. The answer is they work great together. When a UFO and Dial-A-Jet are used on the same carburetor you have a very high tech carburetor at a reasonable price. Due to the carburetor's newfound ability to atomize fuel more efficiently, your engine can produce maximum horsepower and torque under all conditions without changing jets. The chart will show you where each product is most effective. As you can see by the chart, they compliment each other.
What about clutching your snowmobile? Do you have to change your clutch after installing UFOs? NO! Should you change clutching? YES! Clutching is simply a matter of having your transmission follow the power curve of your engine. Therefore it should be easy to understand that any changes in the power output of your engine must be followed by a corresponding change in clutch calibration. Without making this change, the power does not get to the track or ground. These graphs will show you how the power is effected by UFOs and how to get the power to the ground. The chart below shows a properly calibrated shift curve, holding a constant RPM from low end through midrange and top end.
The chart below shows a shift curve that has been altered by added HP produced by the UFO. Your clutching should be adjusted to get the additional horsepower to the ground.
As shown in the graph, your clutching needs to be adjusted in low and midrange only. THUNDERSHIFT or HEAVY HITTER Kits make this easy to do. With Thunder Shift/Heavy Hitter you can adjust low range, midrange and top end independently - no other method gives you these options. It's inexpensive, it's easy, it's accurate! By adjusting the clutch to run the proper RPM you transfer the power to the track giving you a big boost in performance.
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Summer business
hours: Mon through Thurs 9am - 5pm, Fri 9am - 12:00pm CDT |
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