Ive used the blue atoms a few times one on a vc 160 was terrible to start so i went with points again . had one on my victa consul 125cc same issue .
one of my super 24's had one when i bought it started and ran well however improved running when i replaced it with a power torque module . i think the secret it to get the timing right. bastard things really. not to mention if you don't have points set right on a super 24 they wont start at all.
interesting to hear about other experiences though .
Ive heard of those atoms making 2 strokes run backwards too.
cheers tomo