Xray XT4 - FRONT SUSPENSION ADJUSTMENTS; ECCENTRIC BUSHING ADJUSTMENTS; FRONT ADJUSTMENT TABLES

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3. FRONT SUSPENSION

KICK UP

ROLL CENTER

TRACK-WIDTH

The tables describe the amounts of adjustment using the center and outside positions of the eccentric bushings.

The middle position eccentric bushings allow for finer adjustment increments.

The track-width is directly influenced by the size of the

wheels and tires used.

Example:

KICK-UP

TRACK-WIDTHROLL CENTER

FFFF

FRFR

(°)

(mm) (mm)

=9°

=8°

=10°

=8°

=7°

=9°

=10°

=9°

=11°

0.75mm

0mm

0.75mm

1.5mm

0mm

1.5mm

KICK-UP

C-HUB CASTER

7° 8° 9° 10° 11°

6° 13° 14° 15° 16° 17°

9° 16° 17° 18° 19° 20°

Caster is the angle between the steering pivot

axis and the vertical plane. Caster is affected not

only by the C-Hub caster, but also by the front

kick-up angle relative to the flat chassis bottom.

The table indicates how kick up angle effects

total caster.

The XT4’s stock caster blocks are 9°, but 6°

blocks are available as an option.

TOTAL CASTER

C-HUB CASTER

KICK UP

0(FF) - 0(FR) = 9°

0.5(FF) - 0(FR) = 9.5°

1(FF) - 0(FR) = 10°

= 9°

= 9.5°

= 10°

The XRAY alu front lower suspension holders provide great range of adjustment for the front suspension. Using different combinations of eccentric bushings, fine adjustment of front kick-up, roll-center, and front

track-width can be obtained. For more information about the influence of kick-up, front track-width, and roll centers on car handling, please refer to HUDY Set-up Book (#209100).

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Composite eccentric bushings

INITIAL POSITION

1º 1º0.5º 0.5º0º

1º

Composite eccentric bushings

INITIAL POSITION

1º 0.5º 0.5º0º

Check for free movement