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Timing problem  Curtis
 Jun 10, 2002 06:13 PDT 
I believe I have a timing problem with my 1980 Vespa Si. It runs fine
(actually @ 85% of capacity) until it warms up, and then it runs like a sick
dog. It backfires out of the air filter when you give it some juice. Does
this sound like timing to anyone? If so can I adjust the timing, or what
part(s) might I need to replace.
I pulled the air filter off and it looked clean, and smelled like fuel. The
fuel is mixed correctly and new. The spark plug is clean.
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