Dong Fang DF 250 RTB Bobber Information

[DanDaMan]

your backfire on decel is probably the air injection operating as intended , burning (detonating) excess fuel in the exhaust (once removed might make your backfire "go away" but you will be again polluting :p )

I have Tubes in my tires , safe to do (edit - make sure to have em check the air inlet other experianced it was loose , 2 twists of the wrist with the right tool might fix your problem)

dimming headlight I fixed by replacing voltage regulator (got my replacement at - Scooterparts4less.com ) = note - a regulator that lets power drop enough to dim will also allow power surging , which will pop lights and even burn up turn signal relays (I lost 5 headlights a few taillights and turn signal relay be4 changed)