Only a proper break-in will insure the best performance out of your engine in the future and
guarantee its long and trouble-free life.
Break-in is required when an engine is new or has undergone a major service of the engine’s main
parts (piston, cylinder, connecting rod, etc.).
Prepare fuel. Vortex engine works with commercial gasoline, leaded or unleaded, as well as racing
fuel, with minimum 95 Octane.
Mix Oil and fuel at 5% (i.e. 50cc of oil every 1.000cc of fuel).
This engine is only to be run Motul GP engine oil.
Shake the can thoroughly to mix the fuel and the oil properly. Then fill
the gas tank in your kart.
A mistake in measurements could result in engine damage.
To start a cold engine, raise the choke lever positioned on the
carburettor.
Once the engine starts push the choke lever down.
Warm up the engine by accelerating up and down the engine RPM alternately between RPM’s.
Bring the water temperature around 48-50 ° C before stopping the engine.
Do not accelerate fully but only partially.
Check that the cooling system warms up evenly; in case it warms unevenly proceed again with the
bleeding of the cooling system.
Once the engine is warmed up and the cooling system works properly, proceed to the track.
Run the engine by alternating RPM’s a few seconds on and off the throttle at 3⁄4 maximum
throttle.
Do not hold the throttle at a constant speed. Continue this way for 10/15 minutes and return to
pits. Check everything on the kart is tightening properly.
Be careful, both engine and muffler are hot.
Return to the track and slowly increase the RPM and duration of the acceleration phase
for 10/15min more. Intermittently open the throttle fully and then release it.
After 10/15 minutes of brake-in, your engine is ready for competition.
During the break-in, nuts and bolts tend to loosen. Once the engine is cold, check the
torque of the exhaust, head, etc.
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