So here I am, it's 2008 finally, and I've been riding my Hayabusa for 7 years now. It amazes me when something comes across my path about the Hayabusa that I don't already know about (except for inner motor stuff, I don't wrench there).
Other day I was complaining to Vince (1Vapors) that I still have to twist my wrist 'under' to get full throttle. He mentions to me that maybe I should get a quick throttle. I say "hell no", I'm not paying over $100 for an on/off drag racing switch.
Vince corrects me, says "no, get the cheap quick throttle mod. Go to the dealership, order up a throttle grip for an 04+ Yamaha R1. It'll speed up your throttle maybe a little more than 20%. Stock throttles on Busa are 'long' because we have fast torquey Busa's that they don't want us looping. Had it on my bike for years."
So, I order the part, slap down $17, and it arrives 2 days later.
Edit - It actually may have been an 04+ throttle tube, not the previously stated 02/03. I'll confirm
Installed it, messed with the cables a little to adjust, adjust again while engine is running and testing the throttle by blipping to make sure it's not on too tight, and that it indeed returns to idle fast.
Impression
Gotta say, I should have done this a long time ago. Your bike doesn't make any more horsepower, but boy do you pick up speed anywhere just faster. It actually feels like I just went another 2-3 teeth up in the back, it just picks up and moves out sooner, fast, without being too aggressive.
Then I hit the 1/8, and was consitantly in the 1.6's all day long (except for one wheelie). The throttle helped, because even I know, sometimes my brain doesn't let me hit it WOT fast enough. This mod alone helped my 60 foot in time and consistancy. The part was less than my entry fee to the track!
After track, went riding in the mountains. Bike just 'picked up' faster everywhere. In conclusion, for drag, canyon, track, or mountain racing and having spirited fun, this is a must have. If you tour the bike a lot, or are not used to really getting on the gas, maybe let this one mod pass.
I"m writing this out because I noticed that there is no mention of it. So much, soooo much info was lost in the archives of SH.org before the new owners took it over. I hope some of you enjoy this cheap mod as much as I do.