Hello new 3-wheeler. I can’t help much about the cables themselves. I have found cleaning the rust,paint, and grime a using mirror and light if needed too look for pins,c-clips,welds. Good pictures posted helps got response cause most people are visual. Besides people like to look at other peoples new toys. With the clutch system you have I think you’re 8 horse just has the higher upgrade. Some are for 21/2 to 5 hp some are for 5 to 8 hp and some are 8 to 18 hp. You just got and up grade!!! My Dad bought me a new small tri-sport when I was in 4th grade for $318. For 9 years I drove the hell out of it.(had no brakes the last 6 years) Always did the maintenance and repairs and restoring my self. When I was 19 I sold it for $250. Good luck with your tri-sport.