Why the aversion to buying what they call a "tandem" cable? It's around 10 feet long and cost about Five ($5) bucks. Picked it up at a bicycle shop. easiest solution I know.
that is one great looking Kart! How did you connect the throttle at the engine? Would you mind posting some close ups? Don't forget the most important part of the build... Painting it! any colors in mind?
Rachet-
I have the same HF motor, and it wouldn't even start until I added enough oil. It has a "Low Oil Sensor" that I've read will Kill the engine even if it's fairly full. It's an easy starting point for trouble shooting and a cheap fix.