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why does my bike cut out when i open the throttle?

i have a gillera dna (automatic), it starts ok but cuts out every time i go to open the throttle. i changed the spark plug checked the fuel lines and tried to adjust the carb but nothing seems to work.
john89, October 2009
it could be the air flow on ur gilera dna might need to buy a new jet they cost no more than 3 pound and there inside ur carb

ben, October 2009
Your carburetta has jets inside, A smaller jet and a main jet, The main jet sound like it is blocked, Which when you throttle up is not passing fuel throught it, This is located inside the carburetta mainly where the float is situated at the bottom of the carb, You need to removed this to gain access to main jet, Is possible to clean these just using a sewing needle or using an airline to blow out clean, If this doesnt work remove the main jet which is screwed in and clear obstruction and refit, It will rectify the problem and your bike will be running again.

Ian Mechanic, October 2009
sounds like blockage in main jet. take it out of carb and check.

rayb, October 2009
link Click here to see other fixes for DNA.