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Responding to the original question (hard starting), the most effective thing I did was replace the stock battery with a Battery Tender Deltran 240 CCA Lithium Iron Phosphate.
I also crank up the idle speed until the beast warms up. Until the engine warms up the cold fuel won't atomize well enough to keep my Hawk running at "normal" idle adjustment.
I'm using the 30mm Mikuni clone off eBay, a 112.5 main jet, and a 35 pilot jet. About 400 feet above sea level at home in Smalbany, NY.
BTW, the "stock" carb on my Hawk had a knurled idle speed screw which made adjustment very easy. The eBay carb has a phillips head screw (different diameter, otherwise I'd swap them), which makes adjusting the idle speed a pain. One of my winter projects will be to drill/pull the EPA caps off the stock carb and install the proper jets. Then I'll start work on restoring my Ural Gear Up (-:
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The short list:
2011 Suzuki Boulevard C50T
2021 Chongqing Liyang Jiayu Hawk 250 DLX EFI
2017 TaoTao CY50-B scooter 79cc big bore kit - 45 MPH! (sold)
2015 Haosen Hawk (sold)
2002 Honda XR100R - project bike almost done.
2013 V-Strom 650 Adventure (sold )-:
If I listed every bike that I've ever owned you'd either
1) Get bored
2) Be somewhat envious, or
3) Wonder: "What's wrong with that guy?" 
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