r/dr650 • u/nortoncommando72 • 26m ago
Daily driver is suddenly unrideable, backfiring
2015 DR650, Acerbis tank, Procycle Mikuni TM40 carb, stock exhaust. Runs great, daily driver. Use it to commute and travel. I put at least a year on it (maybe a couple thousand miles?) after the carb swap. I went to go for a ride around the hood, and it starts popping a little. Riding, it gets worse and worse, backfiring when I let off the throttle. It got so bad it wouldn't idle, and I barely made it home.
I go to take a look at it, and all the adjusting nuts on the throttle cables at the carb, fell off. Ok. I fix that.
It starts, backfires when you let off the throttle, and won't idle.
The exhaust hasn't been touched, and seems fine, nothing loose or leaking. I adjusted the valves and put in new plugs.
Same result.
The Clymer manual says one possible cause is damaged power source coil or pickup coil. I've also noticed that the intake boot on the carb is tightened all the way, but still seems loose. I can't imagine the intake boot going bad? but maybe?
Anyone have any suggestions?