gilera dna 50 wont start?

Hi,

White smoke is associated with air, or in this case excessive air. You may have dislodged some part of the inlet side of your fuel system, this could incude:
1/ Loose air inlet manifold
2/ Cracked inlet manifold stub
3/ Loose spark plug (yes it does happen)
4/ Dislodged vaccum pipe

Have a good look at the integrity of the whole area for loose pipes, bolts and jubilee clips.

Cheers

westcountry
October 2013