
TECHNICAL INFORMATION
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En
ine 450 - 550
• Connect a differential vacuum meter to both by-pass
hoses.
• Lower tank gently avoiding to squash vacuum meter
hoses.
WARNING
As the vehicle is without air filter, the working
area and tank lower side shall be accurately
cleaned.
• Start the vehicle and check synchronisation of
cylinders vacuum reading.
• If synchronisation is not achieved, loosen the adjusting
screw and position the slot so as to balance vacuum.
• Once synchronisation is achieved, tighten the adjusting
screw.
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