Motorcycle Repair: xlr125r, sparkplug, fuel injector

Question
hi there i have just bought a 98 xlr125, and found that when i start it, it takes along time for the engine to idle by its self, i have just replaced the airfilter and new sparkplug too, so if i set the idling up wen its been going for say five mins it ticks over fine then i'll ride the bike for maybe 15mins and the idling starts to creep back up slowly till its revving quite load

Answer
jason sound like jets are bad first buy a bottle of fuel injector cleaner pour it in tank let it run for awhile .it might clear out.if it doesnt let me know ok im here at my cycle shop if you need info.
                
                         mitch kruszynsky