i have a 1979 safari moped with minarelli engine. i'm not sure what model engine it is, but it has a plastic blower housing.
i think this moped and i were meant to be. it was manufactured the same month and year i was born: 7/1979.
anyway, it has very little power at all and it eats gas. it runs ok in the high end though, which i expect is normal.
the thing with the low end is that it is sporadic. sometimes it would be able to go up my driveway, which is a bit of an incline, and sometimes not. i also tried to ride it on my yard, which is a hill, but it wouldn't go at all. not even ACROSS the hill with no incline.
i'll try cleaning the carb, but it seems that gas is getting in all too well. i put in 400cc of fuel in and most of it is used up in five minutes. my off road kart and car can get further on that! i did a conversion, and that's 0.1 gal. so a moped should go about 10 miles on that. maybe the jet is too big? are jets standard enough that i can get one at a motorcycle shop?
the ped has 700 miles on it, and compression seems good. don't think there's any problem there.
it doesn't have an airfilter. so i guess it's running lean. it doesn't smoke at all. is that normal for a good running engine? it used to smoke and backfire alot after i first brought it out of storage. no more of that though.
ahh, the spark plug. the spark plug on it is a bosch w8a (same as w8ac). didn't seem like the right plug, but apparently it is from internet research. i'll have to try a new plug. tried some other plugs, and, of those, the spark is much weaker than that of a champion j19lm. the latter has a really nice, wide, bright, and "loud" spark compared to the bosch. the j19lm looks too short, though, so i don't think it will reach far enough into the head. can't try it now since the engine is in pieces. i'll let you know if a new plug gets a nicer spark.
anyone experiment with other spark plug types? splitfires? someone said that bosch platinums didn't work as well in his machine.
finally, is it possible to get higher performance headers or exhaust for such an old minarelli? i've been looking at different places but no mention of such a part. have any of you tried making your own pipe from the design-a-tuned-pipe link on this site?
btw: the carb leaks because the bowl gasket is crap and the plastic piece that the fuel line attaches to is cracked. i'm trying epoxy to fix the plastic. dunno what to do with the bowl gasket. i'll follow up on how i fix it if ppl are interested.
sorry for writing so much.