I cut my throttle cables to fit. If you will look close the end that fits into the carb it has a very small collet soldered on. Heat this end up with a propane torch and with small pliers pull off the collet pull the inner cable out of the cable housing fit the outter housing from throttle to the carb to check for fitand to measure for the proper length. Then cut the outter housing with a dremel cut off wheel or sharp wire cutters. put the inner cable back in the outter housing and of you want to lube it now is the time to do that. I use a measurement of about 45 mm of inner cable sticking out of the outter cable. Then I solder the small collet back on then trim off the excess cable either with the dremel cut off wheel or sharp wire cutters. Sounds hard but very easy to do. If you out there don't want to try message me and maybe I could do the job for you.
Norman