Modern Vespa

Hi all
First post here but I've used the knowledge in here a lot.
I'm in the process of changing carb from o Weber to a dellorto 17.5mm due to well known starting issues. It started on the first kick but the idle was waaaay high and the scooter took off... First I thought it was the idle screw but after a while investigating I now think it's just the throttle cable that is too short.
Now the question:
I've read somewhere that there is more than one cable going from the handle or at least connected to the same. Can I adjust the cable in some way without affecting other things like the oil pump or whatever is connected on the same cable?
Thanks!

Doh! Forgot! It's a ET2 -02..

the cable goes from the handlebar into a splitter. From the splitter, one cable goes to the carb and the other to the oil pump.

In theory you should only be adjusting the cable that goes from the splitter to the carb and not the oil pump cable or the whole cable.

thanks! Solved!! It was really my own fault. After reading your post I realized I couldn't really adjust it the way I wanted so I removed all plastic covers around the handle bar and found that the cable end had jumped out of position. Pushing that back into position gave me the few extra mm I needed. Thanks again!!!