I'd take maybe 3 or 4 hours to do it only because I check and recheck clearance over and over till I feel I get it perfect. Also cause I still use my somewhat inferior tools. (don't have a proper adjusting wrench or adjuster) Using the Kymco tools or equivalant, I figure it could be done in 2 to 3 hours.
First time I know I must have spent close to 8 hours.
Yeah, I've been real busy lately what with totalling my car and shopping for new one. Capturing and bringing 5 new rescue cats home and getting them situated and starting their domestication. Still visiting one homeless cat daily 17 miles away and trying to get his trust so I can capture him.
And of course I still go to dialysis Tue, Thur, Sat.