HAVING BIG PROBLEMS WITH W REG MGF.HIGH TICK OVER AROUND1800RPM.BLIP THROTTLE AND WILL COME DOWN TO 1100,THEN 800RPM. BUT AFTER 8 MILES OR SO BACK UP TO 1800RPM. CAN REMEMBER SOME PROBLEMS WITH THROAT IN PLASTIC MANIFOLD JAMMING BUTTERFLY,BUT CANT REMEMBER CURE FOR IT?