If there is powder coat(paint) in the threads,yes you need to tap the holes. Larger holes the powder shop I have gone to tapes over the holes. If you see powerder coat in the holes it will make the bolts not want to screw in, the paint is thick making the hole smaller.
Buckeye, Arizona(USA) 2011 Victory Cross Roads, Black police bag guards, black engine guards, black handle bars, Triumph Tiger mirrors, Triumph hand grips, set speedo/tach back 5" , adjustable timing wheel, Lloyzz Fuel Programmer III & air filter. Modified exhaust, made stock into 2 into 1. MRA windshield, Rotated front fender forward,relocated ignition switch, Bad Ace Fuel Tank Risers, Fat front tire.