vespa gs3 top speed?

[Alan35]

hi

 

i have one gs3 with engine vs5.

i have rebuild the engine with new piston

main jet 105

needle postion 2

ignition to 27

mix 1:25

spark b7es

 

but i have a problem, the top speed is about 83 km/h.....

 do you think i have the good needle position ?

 

 

thank you

Alan

[andreasnagy]

The Needle Position isn't the Problem in this case. I would advice to try a smaller Main Jet.

If that doesn't help look after the needle of the swimmer...

[Alan35]

i have a 103 main jet, i can try it