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I have a Piaggio Nrg 2003 EXHAUST FLAMES

I have a Piaggio Nrg 2003 been in the garage for a while now trying to get it back on the road for my son . When trying to start it turning over got good spark sometimes you get a blow backs though the Exhaust and also flames coming out . Could somebody please help!!

rickharris2 years ago
Almost certainly this is a timing issue

Your pumping fuel into the exhaust whilst trying to start it and then igniting the fuel because the exhaust port is open when the spark goes off.

Your timing therefore is too retarded (late)