Arrow Kart, Owner'S Manual

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Adjustable Torsion Bars
Why?
1. Removable Front Torsion Bar
Removable front torsion bar is a set-up affecting mechanical grip on the front tyres. Removing the front
torsion bar in your kart will decrease front-end mechanical grip.
2. Adjustable/Removable Side Torsion Bar (chassis fourth rail)
The tension bolts on the fourth rail on some karts are designed to allow adjustment to the stiffness of
the centre section of these chassis structures. Under normal track conditions this bolt should be left in
and done up tight. As a track offers more grip or as rubber goes down on the driving line, then the bolt
should be loosened until the point you can turn it freely with your fingers. If the track has good grip
with a lot of rubber on the driving line or if the track is very bumpy then the bolt and its spacer should
be removed from the kart altogether.
Some Arrow karts also provide the ability to remove the fourth rail/side torsion bar completely. Having
the side bar fitted in your Kart will normally provide more grip. Conversely, removing this torsion bar
will reduce grip.
3. Adjustable/Removable Rear Torsion Bar
The adjustable/removable rear torsion bar is a good tool in helping to create more grip in the back
of your kart. Arrow karts are supplied with this chassis-tuning feature. This allows you to fine tune the
chassis by increasing or decreasing rear end grip. Running the bar “full stiff” (i.e. with the blade of the
torsion bar set vertically to the track’s surface,) will maximize rear mechanical grip as well as reducing
rear chassis roll. Turning the bar towards the horizontal position will reduce rear mechanical grip while
increasing rear chassis roll. Removing the rear torsion bar completely is the “free-est” setting.
Firstly remember, when racing in the wet always start with the torsion bar fitted in the kart and the
torsion bar “blade” set full stiff. When using the kart on a dry but slippery track, running with the torsion
bar fitted and the blade set horizontally will give the kart more traction off the turn. On a track with a
good visible rubber line we recommend that the torsion bar assembly be run “full-soft” or even removed
from your kart. On tracks that are very bumpy in braking areas and turns, removing the rear bar will allow
the chassis to ride over the bumps smoothly thereby allowing the tyres a better chance of maintaining
contact with the surface.
14 ADJUSTABLE/REMOVABLE TORSION BARS