2000 Unregulated Busa

My hands are sweating just reading your responses! Yeah, that same Suzuki
GSXR 750 went 175 on a road for Motorcyclist magazine! And Jason B. is an excellent all around rider and only went -130 !! Well, the research continues....more later. Doyle
 
There was an article several years ago when Ben Bostrom still rode for Honda. They were talking about telemetry they were getting from the CBR1000 Superbike at Daytona. He said that when he crossed the line his actual bike speed was something like 20mph slower than the rear tire speed when it crossed the line. That's a lot of spin no matter where you are. I have never heard a similar comparison on salt but would bet it would be an even greater amount. Admittedly those superbikes are compromised for top speed duty but it goes to show you how much Aerodynamics comes into play at those speeds.
 
No doubt re: aerodynamics. Prof is right though, just experiencing the whole "authorized participation" of it, regardless of the speed, has to be truly, a major life experience. And the amazing truth is...it's the SAME BIKE that I go on week long touring on, same bike that I'll ride with 15 guys in May with Tim at Pashnit Tours. Hayabusas are just amazing with their many faces. Man, I so respect and admire this motorcycle. Doyle
 
Raydog,
I did Bonneville for the first time this year at the Bub event. Let me share some of my experieince to give you some point of reference. I spent two years preparing for this - practice on a drag strip and three events at MAxton. Miticulas preparations - have always sailed through tech at all events - that means lots of prep - read and re-read the rule book. I am running a 2006 ZX14. Stock engine and anything you could possibly think of to make it go faster has been done - lowered, ceramic bearings, PC3, brock exhaust, MR10, Data acquisition including O2 sensor, no air cleaner, no screen in ram air inlet, racing wheels, speed shift, etc, etc.... My guess around 200HP at rear wheel - stock wheelbase. For comparison with a Busa my last pass at local drag strip I was running with a friend on a weel prepped Busa - piped and mapped, stretched and slammed, air box mod, etc. I believe he would dyno around 170HP. I am running tall gearing (18/38 - three gear pass in quarter) so I come out of the hole very soft (1.88 60) He ran 9.81 I ran 9.84. We were both identical speed at the eigth - 116.21 and at the quater he was at 141.15 and I was at 150.41. Track at around 1500 feet elevation - both of us are around 235 or 240 suited up. I only mention this for a performance comparison as I always view back end speed increase as the ultimate dyno.

I have run 192 at Maxton - a measured mile that you run out of track before you run out of engine. My first pass on the short course at Bonneville - a shake down run - was 180MPH which exceeded the 175MPH needed to qualify for the long course. I did 4 full throttle passes on the long course all between 184 and 187MPH. I was traction limited as the salt was quite slippery and it would break the back tire loose as I approached 185 - the rear end would wonder (go into a slide)and head took to shaking. This is with a proven rock solid high speed handler on rough concrete at Maxton. Ruts also would cause the bike to shutter and I had multiple times that I thought it was going down at that speed. Wind will also push you off line at times - giving an interesting perspective to the approaching flags that mark the course boundaries every quarter mile GPS showed a sine wave type speed variation between 184 and 187 - showing the effects of loss of traction. I believe that it was aerodynamic lift that would breach the traction threshold - I would stand on the pegs as it started to slide and either the dynamics would change or the center of gravity - but this would get it to settle down. I would generally be north of 180MPH by mile marker two - and from there it is one minute at WOT for the next three miles.

One of the main issues with Bonneville is the higher altitude - you will lose 15% to 18% of your power. Air is thinner and you have enough room to reach terminal velocity. Fuel injection was spot on - it only fluctuated .1 to .2% at tt this higher altitude (around 4000 feet).

It is a great experieince and alot of fun - but it was also quite disturbing - the antics at speed. You do need to practice and prepare - you need to know your bike inside out on solid ground in order to have the confidence to stay with it if things get squirrelly in this game.

Here is a link to a video my kids put together as a gift - it does show some of the fun you can have, especially if you are fortunate enough to have a family along for the journey.

 

Good luck and I wish you well in this endeavour.

Kevin
 
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Kevin, I am so grateful for the time you took to explain your experiences and offering of advice. Your insights are clearly another rung on my ladder of learning! Obviously, anticipation, preparation and research are major parts of this thing. Not to sound pompous, but, I'm 60, have owned over 60 bikes, and done just about everything EXCEPT LSR. It just seems like it's a necessary experience for my motorcycling life! The only other thing I haven't done is ride an adventure tourer to Pategonia, and that probably won't happen soon so Bonnie is next! I'll sure be posting what I learn as I go along...thanks again. Doyle
 
did you have any data collection running kevin? I watched a handful of guys on bikes that ran after got the roadster down course... scary looking stuff from the sidelines...
 
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i didnt think i would be interested in that till i saw that video
 
did you have any data collection running kevin?    I watched a handful of guys on bikes that ran after got the roadster down course...  scary looking stuff from the sidelines...
I did have acquisition running - on the engine as well as GPS - what are you interested in regarding this data? the view from the sidelines is som much more comfortable than the seat - the breaking loose at 185 I found a bit disconcerting
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But it was very, very fun - it is extreme racing - I have done motocross when young - and probably 1,000 passes at the drag strip over the past 5 years and this was a good factor of 10 on the adrenilin pump as to any past reference..... but a great life experirienc.

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 i didnt think i would be interested in that till i saw that video
well - my son would be proud if he heard that - As a thrilling adventure and family event - it was the best - I would highly recommend if you have the passion and discipline to do the preperation work.Just stay loose if she starts to dance.......
 
did you have any data collection running kevin? I watched a handful of guys on bikes that ran after got the roadster down course... scary looking stuff from the sidelines...
I did have acquisition running - on the engine as well as GPS - what are you interested in regarding this data? the view from the sidelines is som much more comfortable than the seat - the breaking loose at 185 I found a bit disconcerting
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But it was very, very fun - it is extreme racing - I have done motocross when young - and probably 1,000 passes at the drag strip over the past 5 years and this was a good factor of 10 on the adrenilin pump as to any past reference..... but a great life experirienc.
We had big time issues as speed went up with tire spin.. (A gas roadster <300CID>) after watching the bikes run, we all sat around and then went looked at the bikes a bit.. The weight we saw stacked on the bikes was amazing.. (our chassi was lead filled for our second year)

But did you see exponential tire slippage rates as MPH went up?

We had the power to go the speed but the tires would spin, I thought the bikes looked like they had more trouble than we did with that.. Hats off to you btw... that looks really scary for the bikes (taking into account the minor :cough: ruts left by some of the guys)

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My wheelspin was controlled - not bouncing off the rev limiter at all - I am assuming you were at speed week - I understand the conditions where much better than Bub. I will need to pull up my acquisition data and study it a bit..... I do know those ruts suck.... My final pass was on a record return run - that I knew I could not beat - so I took a casual pass at around 160MPH and could finally see just how bad the ruts were - at 185 they are a harder to see as everything gets a bit blurry or my attention is elsewhere - anyway - what a great place to play - and the old salt flat shuffle - well it will probably not be quite as bad next year.
 
yea great place till time to "clean up" sunburn, salt and open space
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I often thought of trying to go to Boniville. But after reading Kspz3 post. Think I will just watch. I like solid groung when trying to fly.
 
I would rather do pavement but for my area bonnieville is the closest place . I did hear that it was mushy this year .
 
I have a 2000 Hayabusa that was lazer radared at 194mph in 2000. Since then I have Big bored 1397cc Kit Stroked the bike after-market injectors, Cam and a 47 shot NOS,
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My friends Lazer gun with trick 103 unleaded in tank clocked at 203mph.

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