Front hole in the tunnel close off. What dimensions?

[phazme]

has anyone tried header wrap?

 

[cannondale27]

http://www.nordlock.com/

 

[Ruckus]

has anyone tried header wrap?

Yep.

 

[phazme]

How does it work?

 

[Ruckus]

Great. Keeps exhaust gasses hot which means they travel faster which makes more power. Also helps keep the heat off the gas tank. I re-wrap mine every year and have noticed no ill-effects to the pipe itself. Smokes until all the sh!t burns off but don't be alarmed by that!

 

[phazme]

Did you wrap both tubes together or separate?