Help with slow take off (from 0 to 20km/h)

[flaviosa]

I have a kymco super 8 50cc 2t 2015.

Here is a list of what I have done so far:

-Installed smooth drive boss
-Stock variator with 5g rollers
-1500rpm clutch springs
-Tecnigas q-tre exhaust
-Contra spring from this kit (https://www.heavy-tuned.de/racing_variomatik_maxtuned_gy6_4_takter_16x13mm_50gr_60g_70g/a-67838/)
-90 main jet
-Stock airbox (restriction removed).


I haven't checked my speed with GPS but I can see the scooter going over the 80km/h. The only problem is that I still have a sluggish take of. From 0 to 20km/h is quite slow and then the acceleration is great after that. I the scooter is also holding the speed on hills pretty well.

What would you do to improve the take off (from 0 to 20km)? I am starting considering going for a BBK and bigger carb.

Thanks

[aaron8]

rollers seem too light. try some 7 gram.

8.5 is stock

[flaviosa]

but I read in another topic that when we use sport exhaust we need to raise the rpm to gain performance. Thats why I went light. I will try 7g and see how it goes.

[Nori]

changing rollers to heavier ones will make the acceleration from 0-20 even worse
change the carb first , carb will improve greatly the performance with all that modifications !!
but in the end of the day remember kymcos 50cc was never capable to race other 50cc in market

[flaviosa]

changing rollers to heavier ones will make the acceleration from 0-20 even worse
change the carb first , carb will improve greatly the performance with all that modifications !!
but in the end of the day remember kymcos 50cc was never capable to race other 50cc in market

Which carb would you recommend? 19mm? Do I need a new intake manifold?

[Nori]

get a 20mm carb

@thanks zombie for advice , im selling my super 8 so i'll keep it stock except a polini vario