I purchased my moped in October and it ran perfectly, for a month or so...
then i started to need more revs for it to engage drive to set off. i thought that it may of been the rollers that were worn, i left it as i had no time to replace them and obviously the problem began to worsen. Then a couple of weeks ago my scooter began to splutter and it was really gutless when picking up speed after slowing down. At first we believed it was the fuel as id filled up at a different petrol station to what i normally use. So my dad drained and cleaned out the carb and we put new fuel in, it was no better... so when i got my Giannelli exhaust for it i replaced the rollers with the ones they gave me. it was still running terrible, i also put a new drive belt on my bike, which made absolutly no difference.
Now when i give the bike full throttle i can hold it back, it just has barely any drive, then when i eventually get it to move it hardly accelerates!
im completed stumped, i've done everything i know, any ideas of what could be wrong would be much appriciated, many thanks

Paul, January 2011

Somethings came loose in your engine, or it may be your throttle cable, however i havent played around with these and wont know the solution to it.

Wezza94, January 2011

well the reed petals are made of metal on these so it may have broken up and spat backwards into the carb so it would be worth checking as i say,good luck with it.

adam bike doctor(of milton keynes motorcycle centre), January 2011

yeah the air filter is cleaned out and its not blocked, when my dad cleaned the carb there were metal filings in it, could that have anything to do with what your saying?

Paul, January 2011

yeah the air filter is cleaned out and its not blocked, when my dad cleaned the carb there were metal filings in it, could that have anything to do with what your saying?

Paul, January 2011

does it rev out on the stand ok ?or does it splutter still a bit.it sounds like its a carburaition problem but it may also be a broken reed petal or leaking crankseal too.you need to check the reed valve first i think to check for any cracks or bits missing off the petal in the reed valve its the part that the carb bolts too that goes into the engine a bit.i take it you have checked the air filter is ok and not blocked at all?

adam bike doctor(of milton keynes motorcycle centre), January 2011