back firing on decel

[crispy duck]

Just had my x moto in at the dealers for a 12k service and got it back yesterday.Took it out for a ride today and the handle bars was loose and all 4 bolts wasn't even hand tight so wasn't happy about that but its easily sorted.

Anyways before the bike went in it ran perfect with no back firing and now on decel it does so what could they have altered to make this sudden change ?

(Hmm while typing this i just had a thought maybe they changed the air filter and that is the problem) i cant check this until tomorrow

any other ideas or something that is obvious?

Thanks

 

[Losttheplot]

Just had my x moto in at the dealers for a 12k service and got it back yesterday.Took it out for a ride today and the handle bars was loose and all 4 bolts wasn't even hand tight so wasn't happy about that but its easily sorted.

Anyways before the bike went in it ran perfect with no back firing and now on decel it does so what could they have altered to make this sudden change ?

(Hmm while typing this i just had a thought maybe they changed the air filter and that is the problem) i cant check this until tomorrow

any other ideas or something that is obvious?

Thanks

Was your exhaust removed for any work? could be air getting in somewhere? were the valves adjusted?

 

[crispy duck]

valves was checked not sure if they adjusted them as when i asked if they was the reply was if they needed adjustments you would have been charged extra for the parts needed so dunno

 

[mhsnowy]

Could be a faulty spark plug?