My CRF150 starts first kick just about every time
EXCEPT when I lay it down (mostly on the right side) and then it's a little devil to start

I now just open the throttle and 1/2 kick lightly, knowing it won't start right away so not to get in a snit.
When I first got it it was really tough to start but it was my first bike as well. I finally ignored my hubby and opened the throttle abit and that, along with practicing the kick every night and wearing it in, seemed to help. We also checked the sparkplug and valve clearances and regaped.
Seriously easy to start this bike when it's tuned in. I can start it with flip-flops, I can start it with my hand, I can start it when I flip the starter out and coast down the hill (after stalling- it's easier to start this way than bump starting even). It's all in the tuning I believe.
I have 2 friends that had hideous problems but my secret theory is that their hubbies just never set the bike up right as they started tearing it apart the second it got home.
I've just re-jetted and was REALLY worried that might make it start worse but the only difference is that I now don't need to open the throttle when starting.