Quote Originally Posted by Roadkill View Post
Miss, backfire through carb, rough idle. Also at roll on and steady speed. Hot or cold. Load or no load. Since it came out of the case. 2012 Installed new fuel filter at PDI and changed at 50 mi. Bike has less than 100mi. I've seen several posts concerning carb problems. I did rejet the stock carb (110). Plug is tan like it should be. Not a mech so I'm guessing maybe valves - haven't checked them but will when I get a few more miles on her. Emmisions crap is gone and hole plugged. Did leave the crankcase breather on but it is exposed to the air as I installed a new air filter of about the same surface area.
Neither of my two DFs had/have this problem you are describing. The stock DF should not be backfiring through the carb. Yep, there are a lot of posts considering carb problems, probably most caused by the owners.
I just fixed one I caused.

What model DF? How about adding it to your signature line?

Maybe an air leak causing the backfiring. Do you have good o rings on the carb manifold? Your DF should not need a 110 main jet. A 105 should be plenty big.

What was wrong with the stock carb and CDI,coil,etc? Don't just start changing parts out. I'd put it all back stock and start over.