hendrik
New member
But yes. So I have had 5 different oil heads all have had some degree of surging from barely noticeable to are you kidding me. My current oil head is a 99R1100RT with staintune exhaust and no cat. which had a pronounced surge at about 1/4 throttle and light acceleration. So I added a O2 sensor fitting and used my Innovate wide range air fuel ratio sensor. I was seeing 15.5 to 1 and leaner. My next step was to check spark plugs valve adjustment and throttle sync ETC. No real change in the surging. My next step was to remove the yellow coding plug and retest. The a/f went to 14.2 to one. On a 2000 mile trip my fuel mileage was 45-50 mpg with virtually no surging. I know everyone has a different approach and results this is just what worked for me.