Just bought (in January) a 1983 XL600R.Had a new top end done so I know from whence I start. Took awhile to figure starting sequence.It now starts cold on second hit, warm-on first. It wheelies in first and second with throttle only, and in third and fourth if you pull it up. Dual carbs, and no signs of running lean.No crackle on decel, plug is brown. I am a proponent of the K.I.S.S. practices, and won't fix it if it ain't broken. Will be riding 50/50 fireroads/trails and concrete.No racing. I'm old. I like roost though. Burning question- What specific things comprise "uncorking", and will I get so much more power that it would be worth screwing with an already good thing? Believe the '83 is set up a little richer (first year RFVC motor)than later years? This piggy runs strong.But.....Tim Allen is my hero.More grunt is always good. Do not want to lose reliability.