Hesitation when accelarating

[ronb1967]

my 1999 model has hesitation when you go from light throttle to full throttle, i know that these carbs dont have accelorator pumps fitted, just wondering if this is common + ignition is electronic via a crank pulley sensor, so no adjustment there, although there still may be an electronic vacuum advance via a hose from the base of the carb but ive got no literature on this type of ignition system and im being denied access to the online manuals even tho im a payed up member
any help appreciated     

[ronb1967]

does this mean that no one knows the answer to this problem

[ChrisRLewis]

pm sent regarding the subscriber section problem.

[ronb1967]

forgot to mention its the air cooled model, 

[smallcox]

You R correct, theres no accelerator pump which is a problem but more so on tuned engines.

No this is not correct, you should have no hesitation within the relms of normal driving. Sounds like your mixture is going weak when the throttle is opened. I would check that the inlet has no leaks between the cyclinder head and carb, including the vacum pipe. Maybe check there is no blockage in the carb jets as this you can do yourself without splashing out cash.

Many things on the engine may cause this but you need to start somewhere.