I was just about to ask this question. I saw 171 on my bike and couldn't believe it. Was actually considering getting the odo checked.
For guys who are curious:
My weight: 82kgs, plus I had a tailbag(8kgs). = Total 90kg.
My height: 5-7'
Bike fuel level: 1 bar.(I firmly believe it makes a big difference to the top speed)
Where I did it: Coimbatore-Avinashi-Salem road, the last 100 odd km stretch.
Wind condition: Average humidity, Blowing from behind me, along the road. No crosswinds.
Weather: Slightly cloudy
Road type: Awesome flat stretches, no traffic, mostly dry. Top speed was on a downhill stretch.

I really don't understand what the whole fuss is about reaching 130. If you are not able to comfortablly reach atleast 130 on CBR, maybe you are not accelerating properly or your riding position is not aerodynamic. I'm not sure, and I'm no expert on it. But I was able to do 130 very very easily. Upto 150, it is a cake walk if you get an empty stretch. Beyond 160, the vibes were pretty high frequency. After I touched 171, I actually slowed down and stopped. One because I had never gone beyond 150 before, and two because my fingers were a little numb from the high freq vibrations.

+1 to that! Also, I feel it's very important to properly warm up tyres when you start a run. I usually zig-zag on the road at about 50kph. In rain weather, I've noticed that it helps clear out the muck especially from the rear tyre completely(from the entire span of the tyre).
Oh, that reminds me: When I got the bike, I used to feel that the tyre was not grippy enough. I felt like losing balance in turns and didn't have confidence to bend around a corner. I thought about it, and felt that the handle might be a little tight. Got it checked, and turned out to be true. Once the Honda service guy loosened it up, handling was like butter. That's when I got complete confidence in the tyres.

Changing the pre-load to harder by two has made it much more confidence inspiring on my bike. But on the flip side, it tells me every little pebble that it encounters on the road. The sailing-through-potholes thing has gone.

I'm running on the default suspension setup, not sure what it is.

I did a 40 km dash up the hills of Valparai. Full of pretty deep hairpins. In heavy rain. At night, with mist to add to all of it. I had absolutely no issues. I was able to bend quite well. I remember a couple of times when my feet actually touched the road. Didn't bend enough for the knee to touch the road, but I've never done that anyway, so I don't know the exact technique.

The downhill was in the morning on relatively dry roads. It was AWESOME. I really don't know what you mean by eating up corners, but I was bending and turning all over the place. Again, feet touched the road a couple of times.

Swaying in corners - In the uphill hairpins, when I downshifted too much just before a turn, it swayed a little (I'm guessing because of the soft front suspension). I then corrected myself. Downshift just enough to be able to make a turn, then downshift once more just before accelerating up the hairpin. Didn't face any problems with swaying with this technique.

Check your sitting position (especially your foot position). Properly positioned foot would touch road only if you crash. Otherwise, there is no way that you will be scraping your foot.

Given enough tail wind and sufficiently long downhill stretch, any CBR can do 300 kmph+ easily.

I thought everyone else was talking about speeds on flat roads. That was the reason why I suggested earlier that to judge your top speed, you should make the run both ways and calculate average. If there is even a small gradient and/or wind, it would affect your speeds.

Maybe I need to sort out my positioning, will definitely get it checked out by some of the better riders I happed to travel with. But I've a question-When in ghat sections with sharp deep hairpins, since the road is banked, isn't it natural that the foot will touch the road when you bend more? I'm asking because I remember the bike's footpegs scraping once on a bend, after which I preferred to keep my foot slightly outside(Just slightly, not even a centimeter). I did this because I know it's pretty dangerous if the footpeg scrapes the road, since you may lose control during the turn. So when my boot touches the road, I know I've reached the safety limit.

Update:
I spoke in detail with one of my friends who's technically sound in riding techniques. He gave me the following inputs about bending:
You have to keep only the toe of your shoe on the foot peg, and bring it forward only when you need to change gears/break. This will ensure that your foot is safe. The footpegs may scrape, but you need to know how to control it. Eventually, it will get ground enough that there'll not be much interference.
By keeping only the toe on the footpeg, you are ensuring safety for yourself, and also getting the max lean during a turn. Your knee will also be able to scrape the road then.



It wasn't a deep downhill, maybe about 20-30 degrees incline. If it's strictly on a flat stretch, I would say I did 165kph.

But your idea of doing the run both ways and taking the average is very good. I should try it sometime. Will post it here when I do.

But 300+?? On a stock CBR250r?? Wow, I don't believe that.
At 170 itself, my CBR was screaming close to the cut-off rpm. As far as I know, the fuel supply doesn't increase after the cut-off speed on the engine.( I believe the ECU is designed that way to prevent mechanical failures.) On a modified bike with a different BSFC mapping, maybe it's possible.
Whatever the tailwind, whatever stretch of road, realistically, 300+ is very doubtful in mind.
Having said that, I would love it if someone could prove me wrong.

i think it is the thrill of seeing the speedo crossing the particular mark, even if it means gross speedo error. i too enjoy to see the speedo touch like say 170 on my kawcker. any way it is a moment everyone enjoys. i still remember the video ten hut posted, his bike ( honda fire blade) shooting well over the 200 kmph mark. but honda has the power to do it many other bikes simply dont. may be trustvishwas who has more that enough kms on the honda fire blade will know better.

Hi everyone, I was away from this thread for a while and am catching up from pg 254. I recently saw many ppl talking about top speed and some ppl not sure how others are reaching 150+ mark. I have made this video, hope it helps. Watch full screen in 720p.

CBR250R Top Speed 150kmph 01-09-2011 - YouTube

Track Details: Almost empty flyover, Flat surface & uphill.

Bike Details: ODO reading: 5950 kms, second service is due and engine oil & filter was changed only at 987 kms, I delayed the second oil change, from now on will do at every 2500 kms. Chain lubrication was done at 700kms before this ride. I am 6' tall weighing 65 kilos. Crosswinds: didn't check

6000 kms done. will be going for second service this weekend.
Nothing major to complain about. Will be getting front and rear suspension adjusted. Now i know front cant be adjusted but will be putting in some extra oil to make it harder.

enjoyed it, but i may be wrong but there seems to a mismatch between the RPM and the speedo. when the rpm drops (mid way)the speedo holds indicated speed.

Your friend is absolutely correct. Both your feet should touch footpegs only though toes. (For aggressive riding. Not required for touring) If you see the bottom part of your footpeg, you will see rubber bush which would eventually ground out.

Enough & sufficiently long are the key words here

A 20-30 degree incline is called steep slope.

Thanks. Yes, that can be my gear shifts if you think about it.. I press the clutch to change the gears and the Rpm drops and then starts increasing when I throttle up. The speed should not drop so soon as I change the gear instantly and return the power to the bike.

Also, I will be making many more videos, but I am facing problems mounting the camera. In this ride I am holding it with the help of my mouth inside the helmet, will think of some other ways or find better mounts.

Can anyone help me? has anyone found a good stable camera mount for the bike or maybe helmet?
For Camera: Creative VADO HD 8GB 1st GEN

You can check ketanr15's Leh log.

He fabricated a camera mount for some 50-70 bucks and it works beautifully.

If you wish to spend more, go for go-pro. Nothing beats that.

Thanks, Will check his log. Yes, Go-pro is awesome especially the new one which has 60fps. I might just pick it up this year end. I also have my eye on VholdR Contour HD, lets see.

2011 NEW Honda CBR250R official video (property Honda-Montesa http://www.honda-montesa.es) - YouTube

Anyone know, which helmet he is wearing, don't have breath guard, but looking good.

Guys need a serious help. My friend gave his CBR for second servicing and the SVC people bend the grills of the bike radiator by rubbing it hard. He checked it today only. He's already gone to the SVC regarding this issue. Is there any way to solve this issue without replacing the radiator, coz no spares are currently available rite now. He's F****D up now.