Break-In; Two-Cycle Engine Fuel / Oil Ratio Chart; Pro X Introduction - Polaris 2003 Pro X Service Manual

PRO X Introduction

Polaris' new Pro X models have been designed and tested to endure the toughest of all races. Many hours, days
and months of testing have gone into development, and engineering has decided to use a predetermined weight
rider and snow cross racing for stock setup. After uncrating your machine, be sure to test ride so setup can be
determined for your riding style and characteristics. The following are setup tips for your brand new Pro X snow-
mobile.
1. Stock suspension setup for the PRO X units is geared to a 170 lb (77.18 kg) pro rider.
2. Stock carburetion, clutching and gearing is for 0-3000 ft. (0-900 m).
3. In this manual, there are numerous optional springs, optional carburetor jets, optional clutch weights, and
optional gears to suit your riding preference and location. When changing to optional parts, always test what
you have done. Do not be afraid to experiment.
4. Be sure to use good quality traction products and pattern to maximize your traction and safety.

Break-in

The new PRO X units are high performance snowmobiles, and break-in is a vital step to ensure the performance
of your machine will be at its peak.
1. Always break-in any new part for 50-75 miles before using it for racing.
2. Clutch springs and belts need to be broken in to reach their peak in performance.
3. On the 440 Pro X, always use the correct type of fuel for the timing system you are using.
4. Pre mix 20:1 on break in and 32:1 after break in on the 440 Pro X liquid only.
5. Always use the recommended Polaris oil for your snowmobile.
6. Always break-in a new or rebuilt engine to ensure durability.
7. Maintain your exhaust valves frequently to ensure they are operating to their fullest capability.
Two- - Cycle Engine Fuel / Oil ratio chart
To figure out the correct fuel to oil ratio per gallon, you will need to use the formula below:
Example of a Fuel/Oil Ratio of 20:1
128 (ounces of fuel in a gallon)
The correct way to mix the oil and fuel together is to have a fuel container 1/2 full of the amount of fuel that you
are wanting to mix. Weigh the oil in a plastic cup to the desired weight ratio, and empty it into the fuel container
and mix. Then empty the remaining fuel into the container and mix thoroughly once more.
20 (for the ratio)= 6.4oz. of oil needed for 1 gallon of fuel.
Two--Cycle Engine Fuel / Oil Ratio Chart
Gallons of
20:1
Engine Fuel
1 6
2 13
3 19
4 26
5 32
6 38
GENERAL INFORMATION
32:1
4
8
12
16
20
24
1.1