Attention: if the carburation of the motor (the quantity of gasoline that arrive to the
motor) is poor, therefore the opening of the screw is lower in comparison to the
indications of the chart, will probably occur breakups as seizures, overheatings,
fusions of the piston, precocious usury of the components.
A check of the carburation can be made, analysing the color of the electrode of the spark. A first
control can be done, at the end of the of break-in period, in the following way:
- If the electrode is brown the carburation it is correct.
- If the electrode is grey or clear the carburation is poor and you have to immediately seek the
cause, with the help of an authorized dealer/instructor.
- If the electrode is dark brown color or black the carburization is rich.
Watch out for the regulation of the screw H, because if this is too closed in comparison to
suitable values, you could have damages to the motor. Any damage will occur if the carburation
of the screw H is too opened (rich). In the doubt, therefore, is everytimes better to have a
carburation rich for the screw H.
4.5.2 CARBURATION. ONLY SKILLED PERSON.
The chapter or paragraph is reserved to the manufacture, dealer or center assistance
Vittorazi. If you are our collaborators, we invite you to write to our e-mail address and get
the integral version of the manual.
A phase of break-in executed with care, improves the duration and the performances
of the motor. The motor must be uses with attention in the first 7 - 8 hours of the
break-in (25 - 30 liters).
For the period of break-in, we indicate to move the screw High to a value of 1 turn+1/4
(rotation counterclockwise for 1/4 of turn) and to increase the quantity of oil in the fuel
up to the values pointed out by the chart 4.6.1. After 10 liters of break-in the screw High
could be closed with precision of 1/8 of turn, only if the motor doesn’t have smooth or
regular disbursement, as suitable in the following paragraph.
From our experience we allow to say, this will be the only time when you will have
to touch the screw High. Whenever the carburation will have a variation, it will be
enough to modfy the position of the screw Low. In these period of break-in, thanks to
your intervention on the screw H and to the increase of oil in the fuel, the motor will
enjoy of a good lubrication and of a lower temperature in comparison to the norm.
The performances of the motor won’t be optimal with these regulations, but you will
get a good break-in and a guarantee of duration for the organs of the motor. The first
starting of the motor must be made to the ground (on shoulder), warm up for some
minutes and pay attention to anomalous behaviors or noises. We recommend to
conclude in one day the first two phases of the break-in. Now follow the indications of
the chart 4.6.2.
3.6
Break-in
Get Ready for the Use.
14
MANUEL D´UTILISATION
