I'm about the only regular here that's amused by these little scooters, though there's people who understand the whole technology better than I do.
http://manuals.monsterscooterparts.com/recreational/Bladez/bladez-ex-350-handbook.pdf
My very first thought - From a link I provided:
Throttles come in three types: simple ON/OFF, potentiometer, and Hall Effect
Just a guess, but wouldn't a Bladez have an on/off throttle? Not having any luck with a search on the subject here. (I did find a mention of someone else who couldn't get the YK31 to work on a Bladez.) I mentioned you need a hall effect for the YK31. I'm not aware of a way to make a different throttle work. Trying to think of who has had things to say about the YK's in the past, maybe Amberwolf and DrkAngel. I don't know who really knows Bladez. My own understanding I've developed is that when you replace a controller with anything but a perfectly compatible oem unit (Sometimes even then) you need a new throttle that is matched. Or you go through what you're going through. Not even all the Curries are compatible with each other.
I left hall effect throttle links above, I'm sure a search will readily turn out a wonderful variety.