Hi, new poster here. I've been having some problems with my Yamaha XT125x. It is a 2009 and it has an arrow exhaust system. I've found recently that the bike will not idle/tick over very well at all, I'll put the choke on for a bit and leave the bike to warm up but when I come back and turn the choke off, the bike will slowly deteriorate down to about 1000rpm, and then to 800 and it will die on me. It even happens sometimes after I have been riding for a little while for example. If I get st