Hi, I am about to takle a valve clearance inspection (and maybe adjustment) on my Yamaha XJR13, four cyl EFI. Shimmed type valves. I am a 'backyard mechanic' and a novice at that. I have done top-ends on 2 strokes, and regularly do all the servicing on my single cyclinder bike including valve clearance checks/adjustments, with the nut adjusting type valves. I asked a local bike mechanic about this job, and he said it was time consuming and could end up a pain in the A, as you may need an assortment of shims and a Specific valve tool, when asked if a backyard mech would take on this job, he said NO! My local Yamaha mech is around 2 hours away. I may not have to adjust anything, but this is part of the service schedule and I don't mind tinkering. Am I mad for taking this on????