Originally Posted by
rb70383
Been enjoying the EBR, but it has slowly developed issues. Basically, sometimes at start up it would rev up to just under 3K and slowly idle back down, maybe 2 seconds time. I normally cruise around the 3-4K rpm range. The Surging in that range was getting really bad.
On the last ride, I pulled into a parking lot to sit in the shade a bit. Looking over I see a stud. Don't studs normally come with nuts installed? Well ended up losing 2 opposite corner nuts on the front header. Didn't get the class 10 flanged nuts, (10mm) but they had some class 8 non flanged. (11mm) Gonna order the proper nuts. No room for a socket on the 11mm head.
So install the new incorrect hardware. I can hear the front header moving just a bit. Short story long....
That was my issue. I have heard of exhaust leaks pulling in air and causing the ECU to think its lean and add fuel. That was the other thing, on that very ride I noticed it was starting to smell rich as well. Bike runs great, a lot smoother, idle is still a little high. Guesstimating 1600-1700 rpm. I was going to hook up the laptop and see what the ECU was doing, but glad I saw the missing hardware. Never heard the typical exhaust tick leak sound. Already looks like the mpg is going up. ~36mpg so far.