Is this right???

[dof41]

I got a DNA 50. MODS= 70cc Polini Kit, Leo Vinci ZX,17.5 mm Carb with a main 102 jet with standard air box.

The problem is its only going 57mph.

Im thinkin its cos the main is way to big because when im going full throttle and let off the throttle and back on again it bogs, What do u all think??? would a 84 jet be better????
I've ordered loads of jets from 70-105 but i just want a guess at what i should start with.
Thanks

 

[Browni]

Originally posted by dof41
I got a DNA 50. MODS= 70cc Polini Kit, Leo Vinci ZX,17.5 mm Carb with a main 102 jet with standard air box.

The problem is its only going 57mph.

Im thinkin its cos the main is way to big because when im going full throttle and let off the throttle and back on again it bogs, What do u all think??? would a 84 jet be better????
I've ordered loads of jets from 70-105 but i just want a guess at what i should start with.
Thanks

I think you should try aprrox. 90-95!

 

[smc/polini]

What browni said sounds right, you'd never want to jump from 105 to 84 is it is running. You should start with your next lower jet and keep going down till it's right. But like he said most likely it will be 90-95

 

[sr-johan]

57mph.

thats ongv 90 km/h

 

[Big B NRG]

Try another exhaust!

Yasuni R

 

[smc/polini]

You don't know which polini cylinder he has so 57mph might not be that bad especially if he is still getting it jetted.