2001 yz 125 issue

I just traded for this bike today. It runs great. I only have one issue (maybe its just coming from a 4 stroke background?). Anyhow... The bike will bog down randomly on any gear, but mostly will not reach the top of 6th without bogging down first. Full throttle just won't happen, and i don't know why. here is my plan of attack:

- Clean air filter

- Dump old gas and put in new 32:1 mix

- Change spark plug

If you have any other ideas let me know. I'm hoping its nothing to do with jetting or w.e else. I don't have the money to pay for anything new right now.


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