Vespa 90 v9a1t tuning questions

Hi There

I am rebuilding the above, and would like to tune the engine.

I can't find much information about tuning this model- are there any options available for this bike?

I would like to fit a bigger cylinder and preferably use Malossi parts.

Can anyone offer some advice please?

Thanks in advance.

hello 

my friend tunned small 90to a malossi136

he used malossi 136 

special lip crank

25er carb mallossi (dellorto)

upgreate 4 gear

and parmakit ignition

he makes everytime wheelie

try it