Please help: My DNA used to go really well, but recently it has started to lose power suddenly (top speed drops to 20mph). Then it will pick up again after a while.....but then it can go slow again. Today I took off the carb and cleaned the bottom jets (the ones easy to access). Now, although it revs fine as soon as I reach a certain speed (less than 15mph) the revs drop and I lose power. If I back off on the throttle then it picks up and feels like its going to accelerate but then once again when I get to a certain speed it loses power again...HELP!

Alex, September 2007

I had that same problem, mine was because air was being sucked into the carb make sure it is all tight and check to see if your exaurst is fitted tightly

HB, July 2013

try cleaning the exhaust pipe. it might help

s.bonnici, April 2010

I have the same problem but once it warms up a bit more the bike starts to pick up once left on full throttle for about 10-20 secs it also makes my bike very very juicey as in 50 miles to the tank any other answers in more detail?

Thomas, May 2008

hi, i had this problem, i found out it was my automatic choke, to solve this problem i simply 'blanked' the hole that the automatic choke goes into the carburettor, you can simply do this by taking off the choke and then replacing it with a 2p coin to see if this is the fault.

Dan Treadwell, November 2007

dont bother getting it fixed its not worth the money is what you need todo is go out and pinch another gilera dna and swop the plates !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

john, November 2007

Hi it seems that its fuel surge check filter and see that befour conecting fuel pipe to carb fuel flows well (use a container)

Mario Cilia Malta shumi202@yahoo.co.uk, November 2007

hi i had the same problem my dna worked fine and one day it lost the power and the top speed was about 20 so i took it two the shop and they said the rev cable breaks of into 2 picecs one 4 the petrol and one 4 da oil pump and it was snaped so no oil was going threw so try dat or you might need to get tuned in again

john, October 2007