taishan wont start

[richie15]

???can anyone help my son bought a taishan 49cc scooter,the boy he bought it of snapped the drive belt by trying to wheelie the bike of main stand? the belt was replaced,but now the bike wont start,it has a good spark,good compression.but when i turn the engine over it seems to fire all the time not like a four stroke should, i think it may be the cdi pickup but I'm not sure how to check it.

[davehuge]

If you have a good spark then I'm pretty sure the igntion pickup is working ok. It's the pulse from the pickup that tells the CDI unit when to energise the coil and generate the spark at the spark plug.

Good luck!