Hi There folks,
My friend vespa Si is acting very strange.
it was mine before and i restored and modified it
it has a DR kit,new 13.13 carb (dont remember what jet) malossyi multivar,new crank bearings and seals...in general very nice.
btw it's an electronic ignition model
when i was mine i wasn't riding it very often,but it always started and ran without problems.
since my friend bought it from me, he rode it more and started to have problem. the problems are always the same - the moped doesn't start, he changed the plug on my advice and it worked,about 80 miles later it happened again, he changed to a new plug and it worked again, then the same thing happened for the 3rd time !!
Yesterday we changed the plug again and it started on the first kick.
what could this be?
when i took out the "old" (80 miles) plug it wasn't black or sooty, actually it looked quit well,kind of brownish - maybe a bit dark.
could it be an electrical issue after all?,can the spark be to week to ignite on a plug that is not brand new?
how can i check it?