2000 klr 20000 km or 12500 miles .Doo hasn't been done . Just wondering when you let off throttle it backfires should this be a concern ?And only when riding not when idelling .Is there any signs the doo needs to be done ? Thanks in advance .
Replace the doo asap,,,those give no warning when they fail,,and your risking destroying the motor if you dont,,not trying to be a wet blanket about it,,,but at the very least,,,pull the cover,,left side,,,and get a small flashlight and look at spring,,,lever,,, if you can . Its hard to see
without pulling the rotor off,,,but you can see most of it.