I tun the old gunner gasser (have for 20 years) the gunner gasser is like the motion pro turbo

magura 314--on the plus side it can be set up for a 1/4 turn quick throttle which I like since you can grab full throttle withour having to over rotate your wrist.  on the minus side it is all plastic and does not feel as precdise.  Also this throttloe has no screw adjustment to take up cable slack which makes this throittle a no go for me as not all my cables have adjustments in the cable and there is usually not enough adjustment in the carb alone.

the motion pro turbo.  disadvantage is its more than 1/4 turn and getting full throttle requires a little more wrist twist han I prefer.
Pros--it is much better built. has metal not plastic. can be polished or powder coated. a threaded adjustment bolt/nut to get precise free play.  Its my fav.