SQ Racing Evolution 125 User manual

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QUICK START GUIDE
EVO-CHEETAH®125
Josh Pontello - National & multi-state Champion
®
®

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Index
WARNINGS
GETTING STARTED
SPECIFICATIONS

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Warnings
THE WARNING NOTICE LABEL BELOW SHOULD BE LOCATED IN THE SEAT. IF THE
WARNING LABEL IS MISSING FOR ANY REASON PLEASE CONTACT [email protected]
AND WE WILL SEND YOU ANOTHER AT NO COST.
This kart and engine package is NOT A TOY, and should only be used on a race circuit by
qualified persons over 18 years or by qualified junior drivers under adult supervision.

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The purpose of this Quick Start Guide is to provide technical information and drawings as well as
to help the user better understand their race machine.
IMPORTANT
Complete a general check of the kart and engine before doing the final engine checks.
FIRST START OF THE DAY
Follow the steps outlined below for the first start of the day and to prime the engine. The follow-
ing method minimises load on the starter motor and battery and will consume 75% less electrical
power to do so (12 Amps compared to the fully loaded 50 Amps).
1. RADIATOR FLUID LEVEL CHECK
Use NON ethylene glycol based radiator corrosion inhibitor as most race tracks have
banned glycol based additives. We recommend MOTUL’s Mocool .
The level should be approximately 1 cm below the top of the cap. If the fluid level is higher
the excess will simply be expelled into the overflow bottle once the engine reaches oper-
ating temperature. Constantly overfilling the radiator is a waste of time as the fluid will be
expelled. If the cooling system is completely empty you will need to fill the system. It takes
approximately 1.5 litres of coolant. When adding coolant to a completely empty system,
air locks will occur not allowing the system to be completely filled. Loosening the hose at
the top of the engine will allow the air to escape. After the engine has run for more than 20
seconds, the coolant level can be checked again for any further settling.
NOTE: Do not tap the radiator as the SQ CHEETAH® has a built in thermostat and auto-
matically adjusts water flow / temperature of the engine in all conditions.
2. CARBURETOR JETS MIXTURE
Set/check the carburetor jet mixture screws
Low jet (closest to the engine) should be 1 ½ turns from completely closed
High jet (T or L shaped screw) should be 1 ½ to 1 ¾ turns from completely closed
Getting started

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3. SPARK PLUG REMOVAL
Clean the area around the spark plug of any loose dirt so when the spark plug is removed
no foreign material can fall into the engine.
Remove the spark plug from the engine.
IMPORTANT - Place the removed spark plug in the end of the coil lead / spark plug cap
then EARTH the spark plug by laying the spark plug on the top of the engine. This is so
when the engine is turning over you can see if the engine is firing / sparking. If this is not
done the coil could be damaged. The discharge spark from the SQ Cheetah CDI is so
strong that it needs to be discharged via the spark plug, if not, the spark will jump inter-
nally through the insulation of the coil and if done repeatedly over time could cause coil
failure or high rpm misfire.
NOTE: A clever feature of the SQ CHEETAH is the ignition system. It is a microproces-
sor controlled CDI (Capacitor Discharged Ignition). This controls the advance curve while
adding safety features. The drawback is that the CDI is a sensitive device and therefore
the kart should never be re-charged using battery chargers with the ignition turned on, or
try to boost starting power by leaving the charger connected while cranking. The 12volts
output from most chargers is not normally regulated properly and can blow the CDI com-
puter. A simple thing to do is REMOVE the 3 amp fuse (or disconnect the battery) whilst
charging. We recommend the Kartelli Corse 12Volt Kart Battery Charger). Also make sure
all electrical terminals and connections are tight to stop any voltage spikes in the electrical
system.
One of the features of the CDI is the test spark – this will fire a single spark when you tog-
gle the ON/OFF switch. This will prove the CDI / coil / spark plug are all functioning cor-
rectly. If done repeatedly and quickly – the single spark may not happen – this is normal.
3. FUEL:OIL MIX
Make sure you have premixed the fuel (premium unleaded 97 octane or better) and oil
(Shell Advance Racing M) at a ratio of 16 parts petrol to 1 part oil.
e.g. 16 litres petrol to 1 litre of oil or 4 litres petrol to 250ml of oil.