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7 - Does the vehicle accelerate normally (minimum
acceleration)?
YES
8 - Does the vehicle accelerate normally (maximum
acceleration)?
YES
aprilia
(DOUBLE CHECK THE MALFUNCTION BEFORE REPLACING ANY PART)
- General check-up with Game-Boy and
reset errors (butterfly valve at "O" if
required)
- Check the battery voltage
NO
- Replace the spark plug
- Check Plug lead
- Check the pick-up wiring
- Check ECU. See
"ECU CONTROL"
-
Is the variator working properly?
YES
- General check-up with Game-Boy and
reset errors (butterfly valve at "O" if
required)
- Check the battery voltage
NO
- Replace the spark plug
- Check Plug lead
- Check the pick-up wiring
- Check ECU. See
"ECU CONTROL"
- Is the variator working properly?
YES
Check mechanical parts
- Are all transmission parts (clutch, belt, rollers, variator) working
properly?
- Is the compression ratio right? (piston rings, piston and
cylinder)
- Check the Teflon gasket for the air injector to see if there are
NO
any traces of carbon above the teflon ring and injector casing
- Does the engine sound strange?
- Are the oil guards and bearings in good condition?
- Has the reed pack been damaged?
- Is the petrol filter clogged? Is it in place?
- Has the exhaust been damaged? Is it clogged?
YES
See "AIR/FUEL CIRCUIT PRESSURE CONTROL PROCE-
DURE"
Check mechanical parts
- Are all transmission parts (belt, variator) in good condition?
- Is the compression ratio right? (piston rings, piston and
cylinder)
- Check the Teflon gasket for the air injector to see if there are
any traces of carbon above the teflon ring and injector casing
NO
- Does the engine sound strange?
- Are the oil guards and bearings in good condition?
- Has the reed pack been damaged?
- Is the petrol filter clogged? Is it in place?
- Has the exhaust been damaged? Is it clogged?
YES
See "AIR/FUEL CIRCUIT PRESSURE CONTROL PROCE-
DURE"
NO
NO
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