Pure acceleration

[ManDownUnder]

on one hand it's not fair to compare bike to dragsters... but then I don't think that was your intent... using a bike as a yardstick is not a bad way to show what these things can do...

on the other hand ... FARK! It'd be like sitting in a cannon shell beign fired at the far end of the strip.

Not for me good for anyone who can afford it... I have a wife, kids and 2 mortgages... no money left!
MDU

[TwoSeven]

cibby is slang for CBR not CB

[Biff]

Impressive, but I bet it couldn't get to Akaroa as quick as R1Aaron could.

[NC]

What about that 250 the otherday that did 257kms???

[dangerous]

the cops got me at 312kmh (196mph) down the back straight. I don't have a fairing and it's only the back straight, no runup.

Fuk me........ (that wasent a offer, beit the best you have had this week either) thats some MB100 Mr Speedy pro, so spill whats the turb in ya profile??? :spudwhat:

[onearmedbandit]

Did a quick search on the 'net, came acroos a few links (http://www.mrturbo.com/bikes_zx-11.htm) for one, also another but the link didn't work but included in the brief

This 420 rear-wheel horsepower bike topped out at 213.766 mph ... coatings have resulted in one of the fastest and most rideable street legal bikes out there. ...

. So this bike (cibby 900 back in the early 90s - took it to 1080cc and fitted various bits to it. Was clocked at 215mph on bruntingthorpe ) must have had more than a few various bits fitted to it and a big bore kit to reach 215mph, unless you include a turbo in those various bits.

[gav]

Exactly, sounds like BS to me, the first CBR900RR were actually only 892cc and were anywhere from 105-120hp.
Its pretty hard to get alot of power from these bikes
Lookee here, stage 2 motor tune by BigCC Racing is around 135 hp
http://www.bigccracing.com/welcome.asp?page=47
Holeshot Racing in the UK offer this, note stage 4 is only 973cc
http://www.holeshotracing.co.uk/tuni..._fireblade.asp
Dynobike again, offer up to 970cc big bore, no mention of a 1080cc kit anywhere
http://www.dynobike.com/news6.htm
Again Cycle World took a CBR900RR and threw heaps at it, but this is 2000, not the early 1990's
http://sportrider.com/features/146_0004_blow/
No mention of top speed, but safe to say, it wouldnt be 215 mph!
Got anymore info on this "1080cc" "215mph" monster?

[speedpro]

Fuk me........ (that wasent a offer, beit the best you have had this week either) thats some MB100 Mr Speedy pro, so spill whats the turb in ya profile??? :spudwhat:

'73 Z1 with 72mm (1075cc)pistons. Z1R-tc intake, carb & turbo. 75% methanol / 25% 100 octane (plus a few other bits and pieces). McIntosh frame, custom triple-clamps and tank. Typically 12-15lbs boost but have run 19lbs at Taupo where it'd pick the front up in top at 6000rpm. Gearing for Puke is 15-27, stock is 15-35, and it'll lift the front at 8000rpm in top with 15lbs boost.

[dangerous]

'73 Z1 with 72mm..........

ohhhhh arrrrrrrr........ very very nice, ya dont have any pics do ya would love to see it. Theres a guy down here with 3 Z1TC's dont know who tho
I cant help myself and have moded every turb I'v had from the bike to the 4x4 trucks god I love the wistle they emit on wind up even better the sound at Idel through a big bore pipe..... gezzz I'm sad

[speedpro]

I cant help myself and have moded every turb I'v had from the bike to the 4x4 trucks god I love the wistle they emit on wind up even better the sound at Idel through a big bore pipe..... gezzz I'm sad

I've grown out of that.

[TwoSeven]

Exactly, sounds like BS to me, the first CBR900RR were actually only 892cc and were anywhere from 105-120hp.
Its pretty hard to get alot of power from these bikes
Lookee here, stage 2 motor tune by BigCC Racing is around 135 hp
http://www.bigccracing.com/welcome.asp?page=47
Holeshot Racing in the UK offer this, note stage 4 is only 973cc
http://www.holeshotracing.co.uk/tuni..._fireblade.asp
Dynobike again, offer up to 970cc big bore, no mention of a 1080cc kit anywhere
http://www.dynobike.com/news6.htm
Again Cycle World took a CBR900RR and threw heaps at it, but this is 2000, not the early 1990's
http://sportrider.com/features/146_0004_blow/
No mention of top speed, but safe to say, it wouldnt be 215 mph!
Got anymore info on this "1080cc" "215mph" monster?

The problem is with using google when you dont know much about tuning a specific bike is that you'll still not know anything about it afterwards. And I get the feeling you dont really know about the state of tune that a cbr engine can be taken to. I'm not meaning this as an insult (since I only know the basics myself), but google isnt as great as some people believe.

First of all - a little history on the F2 and CBR900 engine. The 900 engine is the same as the 600 engine (in 91) in design. Up until then the standard engine that tuners used was the old suzi engines (1100 I think) and because of its capability to be re-worked, the 900 also became popular - the 600 didnt receive as much attention because they were all being brought for super-sport racing that took off big time in 92.

The standard tune for the 900 engine for people that overbore is to take it to 997cc since Wiseco do a kit for it - in the same way they do a kit for the F2 to take it out to 637cc.

A little unknown thing is that both engines will go bigger again with the exception that you have to use a kit from a different machine and as you do with a 997 kit, you still need to resleave it. The new sizes for both the F2 and 900 are 698cc and 1080cc (I think 1079 or something silly like that). I think the latters piston kit comes off the cibby 1000F - if not it may have been a kwaka.

The other thing is that the cibby engine is capable of running a 13:1 compression which few bikes of the time were, although i'm cant remember if any extra head work was done other than the porting work that was usual.

It was for this reason that the cibby engine became popular with bike tuners and both Harris (the magnum 5) and Spondon produced frames for it - the most popular being the spondon single sided swingarm version (one sexah frame indeed). People still use them as well on the later model bikes.[IMG]


A 145bhp 900 in a double sided swingarm spondon frame


It used to be nitrous kits were the popular addon, but later on when the F3 came out, the turbo kit had become popular (mrTurbo is a name I remember) - I think they did a bolt on kit that just required some engine work.

The biggest drawback of it all was that if the engine tuning wasnt done just right - they tended to go bang, which is one of the reasons why the 997 and 637 are the most popular mods - since they were very reliable.

Its also the reason why I am restoring my old F2 as a race bike, because there is much more leeway in modifying it and you end up with somethng with about the same capability of a new stock 600RR in performance for not far off the same amount of money and far more enjoyment in doing so. I suspect any streetfighter enthusiast (or car modder for that matter) will tell you the same thing.

[onearmedbandit]

Yes yes, engines can be modified, no problem there. But we're still interested in what 'various bits' were added to your friends CBR900 to get it to top out at around 215mph (345.935km/h), because at the moment that story smells a bit fishy to me and others. What hp was it generating, because to overcome drag at that speed would require some serious power.

[TwoSeven]

I give up.

I think your problem is that you seem to have gotten into your head that big numbers are required to top 200 when they are not. Its just simply a matter of reducing resistance. Most modern bikes will do that without much effort, and 15 years ago it was just a matter of adding an nitrous bottle to punt it up there.

To get faster than 200 you need to increase the baseline of the engine before you apply the punt to it, the result - more than 200. And if you knew about street fighters, you'd know that 215 is the easy speed to reach - 230 is the hard one

So if you are looking for thousands and thousands of dollars of mods in a list, then you are in dream land because they are not needed. And if you read my previous post a little more carefully, you'll see I have listed the mods.

[onearmedbandit]

Okay, so a ZZR11 required around 420hp to do 213mph, but your mates CBR900 required some minor mods to do the same speed. Now I've got it, the air is much thinner in England therefore less resistance hence why a lightly (in relation) modd'ed CBR can do 215. Fark me, should be able to get 200+ out of my gixxer in England.

Come on twoseven, you seriously think that big numbers are not required to do 215mph (remember guys thats 345km/h) on a road bike. If so, maybe you can enlighten us all as to how this is done. After all, as you said it comes down to resistance. Now maybe if his bike had some super-duper slippery fully enclosed fairing along with modifications to the engine and gearing, and a suitably long enough stretch of road I might be more inclined to believe it. But seeing as this bike is the only one I've heard about that can top that sort of speed without major engine work (read turbo and or nos, etc)to produce serious power I'm calling your bluff.

BTW, where exactly are the spec's relating to your mates CBR? Maybe my computer isn't working properly as I can't see to find them.

[TwoSeven]

I dont know why you think 420hp is only good for 213. Have you actually ridden a motorcycle - because some of your statements are really wierd at the best of times - scary.