Knowing Yamaha it was for the extra shove from the tuned exhaust!
![Wink ;)](http://www.thumperclub.com/Smileys/default/wink.gif)
"An act done upon some poor unsuspecting male. A person approaches from behind, and uppercuts between their legs with their thumb, pointer, and middle fingers all straight up in a triangle pattern, making sure the thumb contacts the butthole, and the pointer and middle finger pokes both testicles. All while shouting "THUNDERCAAAAAAAAAAT!" as loudly as possible."
![Roll Eyes ::)](http://www.thumperclub.com/Smileys/default/rolleyes.gif)
Or, maybe not!
![Embarrassed :-[](http://www.thumperclub.com/Smileys/default/embarrassed.gif)
Good health, Bill