j3 competition kosmic Manual page 19

43% Front Weight
57% Rear Weight
50%:50% Left/Right Weight
These are just recommended starting points. Weight can be moved around at the track to change the handling characteristics
of the chassis. Moving weight to the front of the kart will provide more front end grip while moving weight to the rear of the
kart will provide more rear grip. Weight can also be moved vertically up or down. Moving the weight vertically upwards will
provide more grip in the location of the weight while lowering the vertical position of the weight will have the opposite effect.
Keep the side to side weight distribution as close to 50%:50% as possible.
1.2 Seat Placement/Adjustment
The seat placement is the single most important weight adjustment on the kart and is done before weight distribution
analysis. Perfect seat placement may result in almost perfect weight distribution before any weight is even added to the kart.
Tonykart provides a set of specifications for seat placement that should be followed as closely as possible. Consult your local
Tonykart Dealer for specifications for your specific model.
1.3 Factors to Check Prior to Performing Weight Distribution Analysis
The following processes are all very important to ensuring accurate weight distribution analysis.
1. Ensure that the floor is level.
This can be done by purchasing a 5-6 ft. level and checking the floor where the centerlines of the front and rear axles will rest. The floor
should also be checked along both sides of the kart across the width of the wheel base. Compensate for an unlevel floor by placing shims
under the appropriate corner scales.
2. Set toe and center the steering wheel.
If the wheels are not centered during weighing, the geometry of the kart, mostly the castor, will cause the corners of the kart
to be loaded incorrectly. The readings on your scales will then be false
3. Set castor and camber
4. Set spindle heights at desired height.
5. Check tires to make sure they are at race settings.
6. Add weight in appropriate places to approximate fuel and/or oil.
Remember, however, that fuel and oil weights are dynamic. They will change during a race.
7. Replicate racing conditions.
When the driver is in the kart, it's critical they maintain a normal driving position as movements will effect readings. Wear full
race gear during weighing to have the highest level of accuracy possible.
8. Zero all scales.
1.4: Adjusting Kart Weight
Kart weights are usually not at the desired specifications after the first weighing. If distribution is off, and weight is needed,
begin to place the appropriate amounts in the appropriate places. By following Tonykart's seat specifications, you should be
able to obtain 50/50% side to side distribution. If you are way off on your side to side weight distribution than recheck your
factors effecting weight distribution. You might have to move the seat just a little bit to obtain the correct weight distribution.
If you are at the limit of your specific weight class than you might have to live with weight distribution that is not perfect.
However, your Tonykart seat specifications should put your distribution pretty close. If you are under your specific class
weight limit, add weight to the appropriate locations. Do not place any lead shot inside the frame. The weight will shift during
cornering and cause handling problems.
Although overall side to side weight distribution may be correct, individual front or rear side to side distribution may be
sligthly skewed. Your front wheels should weigh within 5 lbs. of each other while the same applies to the rear wheels. If this is
not the case, recheck all of the factors effecting weight distribution given above and reweigh. If the problem still exists, you
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