Change that plug! That may be a reason. I keep one in my box just in case I get throttle happy trying to start it. On more than one occasion I've had to swap the plug because I accidentally soaked it.
After changing the plug, just turn it over with no throttle, after a moment it should at least try to fire. The oil that you used while installing the piston makes the first start a little hard, at least it does for me. Depending on the temp you're in the carb may not be fully useful, my opinion. Pulled will be open, cold choke. I'd try it closed to try to at least catch fire without flooding the plug.
I may be wrong on a lot of this, but that's what I would try.
I actually got my bike to start the first time I put a kit on it with the piston upside down, but it ran like crap and risked snapping a ring.
I ran my new kit with the oil cable adjusted a little more open than normal, plus a small cap of oil in the tank just for good measure. I've recently adjusted the cable back to regular, trying to solve my excessive smoke and rough morning starts, and decreased the amount of oil I put in the tank, but I also like to risk it lol.
How do you have the carb set up? The screw out about two turns until you get it started I would assume.
With all the mods on the intake you're sure there's no leaks?
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