Just installed some new pipes on scoot and, I got to thinking I have'nt checked the plugs in a little over a year, so I figured now is as good as any time to do it and OIL on the plug threads and maybe looks like carbon deposit on plug itself, checked the front cylinder and, tan-grayish looking (good). So what do you guys think, it does'nt smoke any (start, idle, WOT, not one puff, I just dont want it to possibly start. Any help? thanks