bcoz of the financial crisis this time last year pitpro 125 RRs were going for approx $550 now they're at $800 minimum and this is the worst of the semi-decent bikes, if I were you I'd buy a second hand vert or thumpstar
+1 for the KLX110, only because I saw a video with some dude on one coming 2nd or 3rd against 250's on an indoor track, anyone know where I can find this vid again?
Yeah I agree with Numroe, if an oilchange and adjusting the cable doesn't work a new lifan 125 can be purchased for under $300, you could then sell your old one on ebay for $100+, someone will want it for parts.
changed the oil lately? Try some fully synthetic. It's a bit confusing because you say it's hard to 'find' neutral but neutral is on the bottom, I think you mean hard to change into neutral?
If I were you I'd make an offer on something like this:
http://cgi.ebay.com.au/110-cc-motovert-thumpstar_W0QQitemZ160302175094QQcmdZViewItemQQptZAU_Motorcycles?hash=item160302175094&_trksid=p3286.c0.m14&_trkparms=66%3A2|65%3A1|39%3A1|240%3A1318
it won't rust and fall apart so quickly...