Will 1 poorly set idle screw cause hard starting and intermittent rough idleI and dying . And horrible build up on the cylinder 1 &3 plugsI have rebuilt the carbs. New fuel filter. New regulator. New coil packs. Timing is spot on. After rebuilding while setting idle screws back to recommend setting i stripped the & 1 idle screw. From 2000 to 5000rpms(wot) it runs perfectly. Thanks
