I ran a bicycle brake cable for about a year in mine. I took out the clutch arm, put the large barrel end of the cable in and pinched the barrel into the arm without grinding anything. It moved enough to work and didn't break on me. I just threaded it back up the cable housing and that was it.
I only switched back to stock when I got another cable in a parts lot.
The knarp would also work, but then you have an adjuster on both ends of the cable, and loose bits don't play well with clutches.