Phbg tuning issues...

Dane Soderberg /
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Puch 78 free spirit

Treats kit

Dellorto phbg 21

42 idle jet

7w needle

86 main jet

Techno pipe

Here's are my problems:1.  Low end is good when starting but is super weak off the line after I have been riding for a bit. 

2. Mid range seems lean. I was using a 9w then recently went down to 7w. Bottom setting. When ridding in 1/2-3/4 throttle it starts to gasp/die and is fine if I back off throttle. 

3.  As of recently my idle is super high and the mixture screw won't slow it down.

*I recently changed headlamps and do not have it connected yet. Could this break in electrical circuit cause any issues?

*I have read all the tuning info I can find but still need a little guidance. I'm new at this.

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