Honda xr125 swaps or cash in Chatham, Kent for sale

My honda xr125 up for swaps, HAS 12 month TAX AND MOT TEST, only just got her running again as hadn't had the time to fix for weeks due to hard working hours, however turnt out to be the starter gears which have been replaced, now starts on button, everything works as it should but just don't idle, probably pilot jets or something, will swap for 125cc or over, sounds Nice with the arrow exhaust, and has a slight rattle noise coming from the head, does sound like it's mainly the exhaust port so maybe need the exhaust tightened to the cylinder more?, tried being as honest as possible, is a nice bike and sounds lovely, feel free to ask questions and send me a message of what you got and I will get back to you