My I/S will NOT start without a little throttle cold or hot. Has always been that way, and runs very good. No problems with carb sync, Or fuel mix. Decent mileage (38 on a reasonable ride) and 4 degree trigger wheel is the only mod

+1

But mine is bone stock and reacts exactly the same way.
Hay

Jimmyt
JimmyT, in your case it is all operator problem. LOL.....
You left that door open Bro.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>.
Now, I've seen Valk's that had to have a 1/16 of a twist on the throttle to start, also seen, NO throttle, that is the way mine is.
I had a Valk rider, name not important, tell me he blipped his throttle before he hit the bump button and it fired right off. Asked him how the blipping of the throttle helped, he said it sprayed a little gas in the chamber. So, I pin pointed to him there were NO accelerator pump(s) on your bike carbs.
He quit blipping the throttle about 8 years ago now and hasn't had a problem starting that I know of.