Candy_Salad said:
after about 10-20 min i'll be slowing down, clutch in and my idle redlines until i release it back into gear
Do you mean the engine revs uncontrollably?? If so, does it also do this when you put it in neutral after warmed up??
First, warm up bike, turn off and drain oil. Refill with correct viscosity. See how it reacts. I break an engine in with the correct oil. Years ago, I used to use non-detergent oil to break them in, but still I used the correct weight.
As for the revving (if that's what you mean), sounds like you might have an air leak that doesn't surface until bike is warmed up. Could be a base gasket, seal or carb boot. Of course, first check the throttle cable to make sure it's not bound and your carb slide is returning easily to idle.