This machine starts and runs 1/4 throttle,idles great, but under load wont pull past 10 mph tops.BOGS DOWN TIL U LET OFF THROTTLE THEN IDLES FINE..no backfire or such just wont go... i changed and even added a second fuel filter. blew airbox out and ran great for 30 mins and back to same ol...

I am removing carb to clean it, after setting up way too long. Have it loose but can't get choke cable off. Pulled black sleeve back and removed the smaller threaded nut but cable doesn't pull out (like it does on my 500 Sportsman). Do I have to remove the larger nut next to carb (12 mm)? I...