Starting Procedure:
It is necessary when the engine has not been running to set the choke in the On Position and pull the
starter chord until the fuel has reached inside the carburettor. Alternatively, with the air filter
removed you can cover the inlet with your hand and pull the starter chord until fuel arrives to the
venturi of the carburettor.
At this stage the engine should be ready to ignite. It may be necessary to open the throttle lever on
the carburettor to help with the engine start.
When the engine is running through the day it should not be necessary to use the choke mechanism
however if the engine is not starting it is advised to set the Choke in the On Position and pull two
times and then release again.
It is important that the spark plug is not coked up with carbon otherwise this will affect the engine
starting so it can be necessary to clean the spark plug / fit a new one to avoid starting issues when
the plug has had a lot of use.
Running-In Procedure:
The running in procedure for the engine is a very important element in the engine life. If care is not
taken when running in the engine, then it can shorten the life of the engine dramatically.
Start the engine on the Kart Stand and warm up the engine for 3-5minutes but not revving the
engine to high rpms without load.
For the first 10 minutes, drive moderately at varying speeds up to 4,500-5,000rpm. It is important to
vary the RPM for proper camshaft, piston rings and component break in.
Stop and allow the engine to cool, check that there are no fuel or oil leaks.
For the second 10 minutes, drive moderately at varying speeds from 5,500-6,200rpm. Again, stop
and allow the engine to cool.
For the final 10 minutes it is necessary to drive at race speed so increase to the maximum 6,500rpm
(Wide Open Throttle).
Once you have completed the running-in procedure it is important to change the oil. This is to
remove any metal particles which could arrive from the new components in the engine. Drain the oil
when hot so it can easily transport any particles.
Re-fill 500mL of Tillotson Racing oil into the engine and you are race ready.
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