hmm, my vx with the blue head runs great and it has plenty of power.
i have only had to tune it a couple of times, and it seems to stay in tune now.
i can pretty much fuel it up, pull it once or twice and it's running...and running great.
but now i am wondering about your thoughts on the "problem" with the blue heads.
i'm not running the factory glow plug i have switched to an os A3 plug and it works good for me.