2003 GG wild 300 throttle cable?

[firefighterjlklm]

Hey guys,
I am new to the forum and just picked up a 300 wild. I love it! Couple problems though. I was playing around with the jetting and I got it pretty close but am still having a huge sputter when I give it full throttle at low revs. It falls right on it's face but if you let off the throttle a little it will pull like a freight train. I am running a 180 main and a 40 pilot. I dropped to the 40 pilot to eliminate it from loading up at low revs. The 180 seems to pull great except for the above mentioned problem. The problem is the same with a 175-180 main. Next problem is my throttle cable got frayed inside the sheath and stuck wide open on me and nearly killed me. Thank god for the tether!! LOL. It has an aftermarket moose racing thumb throttle. The cable was the wrong one to start with as there was two adjustments on the throttle end with one threaded into the other and the second threaded into the throttle assembly. Also the adjustment on the carb end is adjusted to max. The sheath is about 44" and the cable itself is about 50"... it sticks out the end of the sheath about 6". I suspect that the sheath is the right length but the cable itself is too long. Any suggestions on a new cable? Length...where to get one? sorry if this post is too long but I'm trying to give all the info. Thanks in advance for the advise.