BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 89

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TYPICAL
1. 6 stud row
2. 7 stud row
Most race associations sanctioning oval, snow cross and cross-country events limit the length of
the studs to 3/8 inch above the high point of the track, while most drag and speed run associations
allow a 3/4 inch limit. Rules do vary, however, and it is your responsibility to make certain your
studs are legal. It is also necessary to protect the heat exchangers from damage from the studs.
Another item to keep in mind is the length of the threaded shank of the stud. Some stud patterns
require that the stud pass under an idler wheel. If this is the case, you must be absolutely certain
that the shank of the stud does not project beyond the flat face of the "T" nut. If necessary, grind
the studs off.
Studs that are 20.8 mm to 21.5 mm (.850 to .875 inch) long mounted with square back plates are
generally used. 24.5 mm (1 in) picks may be used for maximum penetration, but their use will
require the addition of taller heat exchanger protectors (P/N 4148382 00) 2 req'd.
CAUTION : Check condition of heat exchanger after every race or every 50 hours.
The best way to determine suitable studding patterns is to stud up and test. Compare several
patterns for acceleration and cornering. Remember, the best way around the corner is to drive
around it—not slide.
Take the time and care to lay out your stud pattern carefully. And, make sure you write down what
works best for you at certain tracks and various conditions.
NOTE : The track must be run in for ten (10) hours before holes are drilled to receive the
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studs. This must be done to stretch out all the elements of the track before any of the track
cords are cut by the studding operation.
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