| Author | Message | ||
     Alexfiggy |
i would like to know your top speed before and after new pipe k&n and race ecm | ||
| Mrvvrroomm |
Those mods aren't going to affect your top speed. | ||
| Alexfiggy |
what does?  the sprocket gear at the rear tire ? | ||
| New12r |
Your top speed is set by the rev limiter and gear ratios. Unless you change over to a chain you will only be able to adjust gear ratios from the engine to the transmission. That only gives you very limited options. Why do you want to change it? If you give the bike a higher top end you will lose the power at the bottom trying to overcome such tall gear ratios, not really worth it to me, just my 0.2. | ||
| Alexfiggy |
its just a question i dont want to change thing | ||
| Xring |
I'm embarrassed to admit I've put 6000 miles on my 9S but don't really know if the top speed is drag-limited or gear-limited. I didn't think that it could hit the rev-limiter in 5th gear, but I just haven't paid attention. Too cold here for any field testing! Good luck, Bill | ||
| Alexfiggy |
110 in 4 gear. i hit the rev limiter didnt know i was in 4th gear bike just wants to keep pulling  do you ever try to shift into a 6 gear you wish you had  | ||
| Diablobrian |
As long as you have the HP to hit the rev limiter gearing determines top speed. In an ideal world you should be geared so that you run out of HP just before you hit the rev limiter, if your goal is maximum speed. In the real world gears that are too tall cause bogging/lugging of your motor and slow acceleration. The gears on your street bike are (like every other component) a compromise. The final drive ratio and (to a lesser extent) the primary are the easiest places to change your gearing to suit your individual needs.  | ||
| Timbo |
The rev limiter can be reached in fifth gear. Having a good tuck, or a tail wind, helps greatly in achieving this. This will put you at about 132 maybe 133 MPH. Modifying the motor may help you to get to that speed quicker, but it will not change the overall top speed. Gearing must be changed to get a different overall top speed, as has been mentioned. Timbo | ||
| Buelltroll |
Mine read 136 when it started screaming at the rev limiter. (Message edited by buelltroll on December 18, 2005) | ||
| Timbo |
Reading the speedo can be misleading, as not all are calibrated exactly the same, along wth other variables. A more acurate way to calculate top speed is figure in the engine speed, primary drive ratio, final drive ratio and rear wheel circumference. On the XB9 series, this gave us a figure of 132.7 if I recall correctly. We figured it out a couple years back. The only other variable to that calculation is wheel spin. On my bike in particular the speedo reads right at 133 when reaching the rev limiter, but I would'nt be surprised to see a variation of three, maybe even five MPH on the speedos of other XB9's. Timbo | ||
| Lonexb |
my speedo says 144 mph while bouncing of the rev limit in fifth gear. the fastest my gps ever recorded was 133.4 mph. this is on a xb12r with only a slip on muffler. other wise stock bike. lone xb | ||
| Kootenay |
I would assume performance mods would simply allow you to reach top speed more quickly--the top speed attained would be the same, due to the rev limiter (unless the performance mods allowed your bike to rev out in top gear where it wouldn't before...). But I gotta say, if I was particularly concerned about top attainable speed, I probably would have got something else (Busa? ZX-14?). Since I ride on public highways (infested with deer and police cruisers) I doubt I'll ever come near the top speed of my XB9R, so as far as I'm concerned it's more than fast enough... | ||
| Buelltroll |
I know mine is about 3 mph off because I went by one of those radar boxes that show your speed in a 35 n had it EXACTLY at 35mph n it showed 32mph. | ||
| Keys |
140mph on a 9(indicated). think I was in the yellow not the red on the tach. brought it back down quick | ||
| New12r |
I have run my 12R to the rev limiter on a dyno and the speedo read 148mph but the dyno said I was 139.9 The Bike will pull on the road all the way to the rev. limiter, I am sure it could go faster but I have no need. | ||
| Buelltroll |
182MPH!!! indicated on an '02 R1 and still had throttle. | ||
| Xring |
Yeah, I look for the phantom 6th gear all the time...but then I have on every bike I've ever owned. Bill | ||
| No_rice |
138 rev limiter on the white xb, and still pulling good. havent topped out the new xb. 197 on radar (190ish on gauge because it was to blurry to make out exactly) zx9, full V&H built motor, and lightened. never did make the 200mph pass because i grenaded the tranny, but it was still climbing | ||
| No_rice |
oh ya, and that was in 1995 when nothing really did 200 out of the box  | ||
| Oneway |
about 135 bounced off rev limiter on my 03 | ||
| Vaneo1 |
5,000 miles and some change later and havent even gone over 90MPH  | ||
| Keys |
I remember the 9 has a theoretical top speed of 145mph by way of rev limit and gearing. Switch to the Freespirit's "extra speed" kit (sold through some UK shops - consists of different front and rear pulley for your belt drive) and you have a theoretical top speed of 155. But you lose speed off the line. The other factor (besides HP), that gets your actual top speed closer to the bike's theoretical top speed, is drag. That's why your R models are getting some faster figures than S model. I read an article about the XB's early development that said that the top speed gains of a few mph in going with a full fairing model were sacrificed to minimize the fairing of the R and show off the naked bits. I'll try to reduce drag and see if I can get past 140 (as indicated). Stay tuned | ||
| U4euh |
137 indicated, and still had throttle and pull, but the front end felt too light so I backed out of it quickly. I havn't tried for a new top speed since putting the RBRDWN fairing on, maybe that will create enough force to plant the front end a little firmer. | ||
| Buellman39 |
140mph bounced off the rev limiter 2004 XB12R 159mph on a 2003 GSXR600 | ||
| Bcordb3 |
I'm amazed that someone can look at a speedometer at those speeds. I figure someone is going 11616 feet per minute which equates to 193.6 feet a second at 132 MPH. I guess my question is. How do you do that? Especially on a XB9S, meaning little to no wind protection. Don't misunderstand me, I am not doubting anyone, I just want to know. Is it on a closed course? I know my reaction time is slow because of my age and I won't be trying anything like that. | ||
| Buellgirlie |
131 indicated on the florida turnpike last spring. 5th gear, before rev limiter. tucked in and low. had to back off because there wasnt any more room in traffic ahead. not a closed course, but a "turnpike" without too many on and off ramps, and a huge concrete barrier in the middle so not too much fear of the law coming from the other side of traffic. whew. scary. not sure i want to do it again, it was more of a "wonder what if" thing. i've since put on the buell race kit, but prob wont be trying to go above 131. this is on a 2004 XB9SL. D | ||
| Scooterroid |
<--- Can vouch for Buellgirlie. I was eating her dust and sniffing her fumes. (figuratively speaking of course).  Steve-O | ||
| Fullpower |
no amount of gear ratio fiddling will take a stock XB9 to 155 mph. Either a lot less drag, or a lot more horsepower will be required. | ||
| Keys |
Ok I have a different question. Is it possible to switch out only the 5th gear thereby getting a different final ratio through the transmission while in 5th. Is that possible? what does it require mechanically or cost? The difference in ratio between 4th and 5th is 15% while 1st to 2nd is 30% (if my math is right). Anyway I've been curious about that for awhile. also wonder why the ratios get tighter as you go up in gears. educate me  |
