DRS Setup Guides
AXLE ASSEMBLY
The DRS Ricciardo karts are fitted with a 40mm axle for DRS125 and DRS100.
Only the original inscribed Ricciardo DRS axle may be used as supplied with absolutely no modifications allowed.
It is important to ensure that you periodically check the tightness of the axle grub screws as if they come loose your axle can move off- centre . This normally results in the brake disc binding on your brake and your karts speed will be
drastically reduced by up to 1 to 2 seconds per lap. You also risk the axle sprocket going out of line and this could result in your chain coming off.
SEAT TYPE & SEAT POSITIONS
The seat position and type are critical to ensure a good chassis set-up. The position for DRS125 is taken in the traditional way i.e. from axle to middle of top centre of the seat is 18- 21cms for the rake angle and then on the front of the seat to the front of the floor tray is brake side 60cms, engine side 61cms.
The type of seat is also important as a comfortable driver should give better performance!
The standard Freeline seat supplied with DRS Ricciardo karts will give good performance; however we can also recommend from the Tillett range of seats the models T5, T7, T8, T9 , T10 T11 or T12 for DRS100 and DRS125 in standard rigidity.
No carbon or Kevlar or VG or stiffer seats may be used.
Sometimes depending on the track design or level of grip your kart may not handle so well. The biggest influence on a kart is the seat position. If you move the seat further forward from the standard position quoted by 1.5cms more grip in the front of the chassis will be achieved. If your kart is not turning in and under steering a lot the most effective thing to stop this is by moving the seat forwards.
If your move the seat back 1.5cms from the standard position quoted then more grip in the rear of the chassis will be achieved. If your kart is sliding around a lot through a corner the most effective thing to stop this is by moving the seat backwards, it will also improve the stability of the braking – move it back too much though and you could risk understeering – it’s a fine balancing act !
WHEEL CONFIGURATION "DRY" SET UP
The standard configuration for dry set up is measured overall (outside of one wheel to the outside of the other wheel) and related to use with DRS aluminium rims FL
130mm/210mm for DRS100 and DRS125.
These are the only wheel types to be used in the dry in the Daniel Ricciardo Series DRS.
STANDARD SET UP:
DRS100 and DRS125: Front track width: 110cms. Rear track width 138cms.
For all DRS Ricciardo karts:
If the front dimension is increased this will increase grip and turn in. If the rear dimension is increased this will give less grip in the back. The wider the width in the rear track the more stable the kart will become under braking. Too wide though and the rear of the kart will slide – this is called “oversteer”
TYRE PRESSURE:
DRS100 and DRS 125: Minimum 8 psi • Maximum 15 psi Higher tyre pressure will make the tyres grip quicker but may overheat causing sliding. Too low and the tyres will take to long to grip. Every track and day is different so pay close attention to your pressures. We recommend that all four tyres are set to the same pressure.
We advise you work within the above pressure parameters quoted to achieve your optimal setting. A good indication that your tyres are working correctly is that at the end of a session the tyre pressure should be taken whilst the tyre is still warm.
A natural gain of pressure of 2 psi per tyre indicates the pressure and the balance of the kart is correct. A pressure gain of only 1psi indicates that the tyre pressure needs to be higher, A pressure gain of 3psi or 4 psi means a tyre is
being over worked and could be too higher tyre pressure or an incorrect set up of your kart.
FRONT CHROME TORSION BAR
Normally we would suggest that the front torsion bar is left in, however if the grip in the track is low or a better balance from front to rear is required in the kart then by removing it will allow more movement in the chassis and better balance, this can be best seen in winter conditions.
Warning: if you run without the torsion bar in an accident your chassis frame could encounter more damage.
SEAT STAYS
Chrome seat stays are usually used the entire time one on each side maximum as per DRS rules.
In general conditions two seat stays bolted tight will make the chassis slide to begin with but will generate tyre temp and therefore increase lateral grip. In high grip conditions especially in sticky rubber two stays loosened will make the kart have more traction on the exit of corners.
In the wet no stays at all give better grip in the rear and good traction.
STEERING & GEOMETRY
The tracking of the wheels should be set at zero. On the DRS100 and DRS 125 the black track rod 255mm are used.
The camber of the kart if measured from top to bottom should be open at the bottom + or – 3mm. If this is not the case, a bent king pin or stub axle are to blame. Older chassis can show signs of negative camber of up to 8mm to 10mm, at this point a new DRS Ricciardo frame should be considered as the chassis may be deteriorating.
You can also increase the grip of the kart in the front and create better turn in if you set the tracking with some “toe out” You can measure the tracking either with tracking discs or some kart lasers. Toe out means that the dimension of the front of the tyres is wider that the edge of the rear of the tyres. This creates more contact on the surface and more grip,
Toe out can be used in the dry but more commonly in the wet when more turn is required. The down side to toe out is
increased tyre wear. “Toe in” will reduce turn in and grip and can be used to reduce turn in.
WHEEL CONFIGURATION "WET" SET UP
The standard configuration for WET set up is measured overall and related to use with DRS aluminium rims 120mm/180mm for DRS100 and DRS125
These are the only wheel types to be used in the WET in the Daniel Ricciardo Series
STANDARD SET UP:
DRS100 and DRS125: Front track width: 111cm Rear track width:
135cms for Senior. For Junior 133cms to 134cms.
If the front dimension is increased more grip is achieved If the rear dimension is reduced more traction grip is achieved.
Wider gives less traction but better braking. The set up above will give a good balance to the kart. However if more grip is required in the rear the following tips can help:
No Chrome seat stays gives more traction.
If more grip is needed in the front then you could consider adjusting toe out to a maximum of 10mm. Make sure that the balance of the kart is not upset too much if you do this though.
Normally the water on the track must be very wet before toe out is used
WET TYRE PRESSURE:
- Very Wet: 22psi
- Wet: 18psi
- Greasy: 13psi
- Damp: 9psi
Tyre pressures in the wet are critical. Too low and the tyre doesn’t get warm and the water will not
pass efficiently through the tread. Too high and the tyre can overheat and work the tyre tread too much loosing grip.
A natural tyre pressure gain of 1 psi in your wets is a good indication that it is working well. If the track looks like it’s going to dry fit your slicks or you could burn your wets out!
FUEL MIX
DRS Ricciardo karts are 2 stroke and therefore requires oil to be pre mixed in the fuel before you add the fuel to your kart.
The only oil allowed is the EK Exced.
Only super Unleaded Petrol should be used 97-99 RON
You must not use octane booster or any friction reducing additives. EK Exced has a unique finger print agent and we can test fuel for any impurities. Some Super unleaded fuels have additives that do not mix well with the EK Exced and break down the viscosity of the oil. This can lead to fuel detonation, seizure of your piston and damage will occur to your engine.
All DRS engines ignitions are pre set and not adjustable. DRS engines work best with 97 to 99 unleaded fuel.
Fuel Ratio Mix: 20:1
Therefore for every 5ltrs of unleaded petrol you mix in 250ml oil
EK Exced = 20:1
During a race weekend DRS100 and DRS125 will use up to 20 ltrs of fuel.
SPARK PLUGS
If your DRS Ricciardo kart ever stops or won’t start from the pits it may be that the engine is flooded. Replace the plug with a new one and you will find it starts straightaway.
Once a spark plug has fouled or oiled up it won’t work again even if you try to clean it.
PERMITTED SPARK PLUG FOR DANIEL RICCIARDO SERIES:
Freeline Spark Plug
NO OTHER MAKE OR TYPE OF SPARK PLUGS ARE ALLOWED IN THE DANIEL RICCIARDO SERIES
DRS RICCIARDO KART CARBURETTOR
The carburettor is very important as it has a great effect on your karts performance and can also determine possible damage to your engine if not set or maintained correctly.
We would advise that the gasket set inside the carburettor is changed at least every two DRS events.
DRS offer a carburettor service for a labour fee of £25.00 + VAT plus parts.
DRS125 BMB
The recommended carburettor setting for the Uk is the fixed main jet Number 91 and the adjustable low speed jet set between no less than 50 mins out (lean setting), to a maximum of 65mins out (rich setting).
Please note if the low speed adjustable jet is set at less than 50 mins you do run the risk of piston seizure and engine damage.
Always start a day on a rich setting of at least 60mins and make adjustments through a day to find the optimum setting.
DRS100 BMB
The recommended carburettor setting for the UK is the main fixed jet Number 85 and the adjustable low speed jet set between no less than 50 mins out (lean setting), to a maximum 60 mins out (rich setting).
Please note if the low speed jet is run at less than 50 mins you do run the risk of piston seizure and engine damage.
Always start a day on a rich setting of at least 60mins and make adjustments through a day to find the optimum setting,