I know this has sort of been covered but I still haven't seen any answers. My 11 Yz has done aprox 60hrs of cross country, trail riding/racing and has developed a flat spot in the mid range. Starts fine but as you ride it with some load on, it is fine off the bottom then it bogs till the revs get up then takes off... not ideal. I have put in a woods setting with the tuner which did work great till a couple weeks ago but now I can't work out want needs doing. Have fully tested everything from pump pressure to TPS. Any ideas... blocked/restricted injector maybe???????