Spent a lot of time rebuilding the original carb on my '85 Cruiser. Before the rebuild my cruiser would not idle at all. Now my Cruiser idles inconsistently. Sometimes it will idle fine for 5-10 minutes. Sometimes it will sputter and die. Other times when driving, I can push the clutch in and the engine will go to 2500RPM. Tested the idle solenoid already. What else could it be?