Tillotson T4 Chassis
The chassis has been designed specifically to suit the Tillotson 225RS engine with user friendliness in
mind and to provide great handling performance. Only stock components will be allowed in the T4
Series in order to maintain the low cost for the category including Seat, Axle, Wheels, etc.
Adjustments can be made to the kart as per any normal category however only using the stock parts
and it is fitted with a caster camber system as standard.
In order to obtain the optimum performance from the kart in all conditions it can be necessary to
make fine adjustments to the setup of the kart throughout the race weekend. The track conditions
can change each session due to more grip being applied to the track or if weather conditions are a
factor and the track condition is not stable. There are many ways to alter the setup of the kart to
improve the performance which will be outlined. Note: the optimum kart setup for each driver will
vary due to driving style, weight distribution (height of driver / lead on kart), condition of tyres, etc.
Front-End Setup:
How to Add More Front-End Grip:
1. Widen the front width of the wheels by adding spacers. Standard setting is with one large
10mm spacer.
2. Raise front of the chassis using spacers on the stub axle.
3. Add positive caster to the front stub axle.
4. Reducing rear end grip can make the front end more positive.
5. Alter the position of the track rods on the steering column - the lower the mounting the
more positive the steering.
Conditions to add more Front End:
When there is minimal tyre wear and kart is not as positive on entry into corners.
On a tight track where the front end of the kart needs to be reactive.
On a green, damp or wet track where the track condition is not good and the kart is less
responsive / understeering.
How to Remove Front-End Grip:
1. Narrow the front width of the wheels by removing spacers.
2. Lower the front of the chassis using spacers on the stub axle.
3. Remove caster on the front stub axle.
4. Adding rear end grip can push the front end and cause understeer removing front end grip.
5. Alter the position of the track rods on the steering column - the higher the mounting the
less positive the steering.
Conditions to reduce Front End Grip:
When tyre is brand new and very positive on steering
On a wide track where less steering input is required
On a high grip track
When the driver is aggressive on turn on this style will suit less front end grip
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