2003 was the worst year for those things. Blew up mine on the line at Oir, rod punched a hole through the case. Anti freeze and 3rd gear was laying in the rut.
FIRST POST ALERT!!!
03 rm's were great. Ran 125 and 250 for F&S never had a single problem. For that I have never had a problem with any of my RM's. What kind of oil were you using? Rm's always act funny with full synthetic. That bike looks like a grand at best.
I offered a grand, his dad said no. He needs 1100 and I thought a grand was a gift. If you look long enough, you can get one of those for 800. I have a beginner buddy that wanted a 125 and I talked him into saving a bit more cash and buying a good 250f because the 2 strokes are a thing of the past.
Turns out I know the dude selling this bike, I went to take a look today. Pretty good shape for a bike, really good shape for a 125. I might consider buying it if I didnt just buy a 2011 crf 450... cant afford anything else. But he never raced this bike so thats a plus.
i had a 04 rm 125 and 05 rm 250. ran amsoil dominator premix in both of them along with amsoil super shift for the gearing. both ran like a raped date and had no problems with either one of them.