don't know were your from but check this site out for an ethanol free station, near you if your lucky, more then likely it's the gas. http://pure-gas.org/index.jsp

 

If I shift into 6th at 55 mph, I'm seriously lugging my motor. Never a good thing. And my bike is stock except for American Custom slip-on mufflers. But it did that with the stock slip-ons also.

 

I had some problem at 70 on the highway, it was the gas... don't buy from that supplier anymore...

 

I retuned and used octane boost.got rid of most of the ping between 2.7 and 3 rpm in 6th.

stopped using the octane boost cause lid froze shut and when I loosend it the whole bottle cracked(messy to say the least)just use it in warmer weather...

One thing good about using a diy tuneing device.Im at the point where it runs good I will tolerate a minimol amount of ping.
compression adds to the mix so they say,im at arounnd 10.5+

ride at 85 when riding with others or 95 solo so rpm's are over 3 anyway and better then stock ping monster.

 

Hows your quench?

 

0.03 head gasket.pistons looked good enough down in the cylender. No quench groves added.