MAN-051 ING
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Section 4 - ENGINE BASIC MAINTENANCE
4.1 RECOMMENDATIONS ON CENTRIFUGAL CLUTCH
The engine has a low maintenance dry centrifugal clutch. The following prescriptions if
carefully followed, will allow a long clutch life.
When starting the engine, make sure that the brake pedal is fully pressed to avoid sudden
accelerations.
ATTENTION:
Once the kart is started, avoid useless accelerations which can overheat and
deteriorate the clutch. Oil the chain before each test.
When lubricating the chain avoid the oil penetration through the lightening holes of the
drum . Therefore do not spray oil close to the sprocket, but inside the lower branch of
the chain near the sprocket on the axle.
In case of lubricant penetration into the clutch, the clutch dragging speed will slightly
increase. This overheats and deteriorates the components of the clutch.
In case this happens by accident stop the engine immediately and, degrease the clutch
drum and hub with specific solvents.
Check the sprocket status after each race or test and replace if necessary.
A bad alignment of the sprocket with the axle sprocket or the lack of oil will damage the
sprocket beyond repair.
Check the clutch:
Every 5 hours of use.
When metallic noises are heard inside the clutch.
If the kart dragging speed exceeds 5000 RPM.
Every time the clutch has overheated (presence of smoke o smell of burning).
To check the clutch, you must remove the clutch cover and the clutch drum.
Replace the clutch:
Whenever the thickness of the friction material (see drawing) is lower than 1.5mm on point
A of the clutch , or, if the body diameter is lower than 82.5mm.
Whenever the external friction material in the A portion of the clutch is very rough (wear or
degradation of the friction material due to overheating).
ATTENTION:
In case the friction material has been totally worn out and there has been a metal
contact between the clutch body and the clutch drum, it is necessary to replace the
clutch drum.
