Weirdness since the re-tune.
It only happens when I fill up. I climb a hill, about 3/4 of a mile long, about 5-6% grade on the way home. If the gas tank is full, to the top, about halfway up the hill the bike starts to stumble, doesn't run right at all. The speed limit up the hill is 60mph.
If I give it more fuel, it still stumbles, but runs a little better. This stumbling will last about 15 seconds of so, about the middle of the climb.
I am loafing along in 5th gear.
After about 15 sec, it starts to run, and respond, and everything is all right. When it starts to stumble., I will tighten down the fuel cap a couple of clicks, not sure if that really does anything.
I fuel in the AM, nice and cool, and then the bike sits for the day in the sun, heating up, probably a 30 degree temp difference. I takes me about 5-10 minutes, in traffic, to get to the hill. It runs fine up until that point.
Any ideas, anyone??
bob