FZR250R vs CBR250R(RR)

I have read that the fzr can go faster in initial acceleration (this is supported at <!-- m --><a class="postlink" href="http://www.250ccbikes.com/">http://www.250ccbikes.com/</a><!-- m -->) , but both have essentially the same top speed - assuming both have 'optimal tuning'.

But even with the acceleration aspect it would probably depend more on how well tuned the bike is - a poorly tuned fzr will go terribly against a properly tuned cbr.

And of course the rider too - I hate dropping my clutch when revving at 10 000 revs from a stop, but if a cbr rider was willing to do that they would be off in a shot.

<EDIT> - Personally I like the fzr merely because every person and their dog seems to have a cbr. At least when they see my bike they ask "what's that?" and "how's it go?".

 

my brother is soon to be getting a cbr, ill race him and let your know the outcome...

 

And the prize goes to YAMAHA of course

As a moderator of this site I say YAMAHA but with out any bias its still yamaha because of many reasons. 1 is the EXUP valve on the 3LN's that produces more backpressure in the mid range revs there for getting more tourqe to the ground. 2 FZR is light now when we are talking about which bike is faster we are assuming that the bikes are both in the same cond the rider is the same person testing both bikes and the riding conditions are the same. So after saying that the FZR is faster from the aspect.

Go with the FZR if buying but beware of FZRs that have been played with but back yard butchers. FZR have very picking carbs if u do one thing wrong they will make you pay for it forever.

<!-- s:roll: --><img src="{SMILIES_PATH}/icon_roll.gif" alt=":roll:" title="Rolling LoL" /><!-- s:roll: -->

 

And the prize goes to YAMAHA of course

As a moderator of this site I say YAMAHA but with out any bias its still yamaha because of many reasons. 1 is the EXUP valve on the 3LN's that produces more backpressure in the mid range revs there for getting more tourqe to the ground. 2 FZR is light now when we are talking about which bike is faster we are assuming that the bikes are both in the same cond the rider is the same person testing both bikes and the riding conditions are the same. So after saying that the FZR is faster from the aspect.

Go with the FZR if buying but beware of FZRs that have been played with but back yard butchers. FZR have very picking carbs if u do one thing wrong they will make you pay for it forever.

<!-- s:roll: --><img src="{SMILIES_PATH}/icon_roll.gif" alt=":roll:" title="Rolling LoL" /><!-- s:roll: -->

 

when i had my FZR250R and my mate had his CBR250RR, he beat me by about a bikes length everytime. But when i raced my mate with his ZXR250a i beat him on my FZR.


BUT.............my zxr now beats my mates cbr250rr

so i guess it just depends on the tuning of the bikes.

 

tuning does a lot to 250's - when you consider that a 1 hp difference is equivelant to 2.5% of the max horsepower on most of these bikes (spec) it puts it in perspective. Most sports 250's have a max of ~44 horsepower so that means if one bike had it tuned so it could only get out 40 hp, and your competitor with 44... (10% lower power)

Tuning isn't as critical on larger bikes because if you lose 4 hp out of 100 then you are still close (4% loss).

 

250cc

I agree with Boz. It isnt hard to get 250s tuned to perfection though. But the best way to get power out is to get the pros to tune it and add some simple things like racing filter, race exhaust ( hard to find for FZR but some places get them custom made) and some clever jetting and she sould be pumping out some postive HP. Remember what you do to the air flow or jetting you must = at the exhaust end to a sertin degree.

 

250cc

I agree with Boz. It isnt hard to get 250s tuned to perfection though. But the best way to get power out is to get the pros to tune it and add some simple things like racing filter, race exhaust ( hard to find for FZR but some places get them custom made) and some clever jetting and she sould be pumping out some postive HP. Remember what you do to the air flow or jetting you must = at the exhaust end to a sertin degree.

 

Rode my mates CBR 250 RR.. pretty quick bike.. though i think the FZR has that edge over it.. espically with the EXUP system.. but it really comes down to the rider..
Knowing me.. i probably lose..
for now..

 

hehe

Yeah CBRs are nice bikes but the FZR are slightly quicker but as Dean highlighted it comes down to the rider <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s --> Stick with the FZRs guys least u can tell ya grandchildren that u rode a bike that had the Deltabox frame and EXUP power valve before the R1 came out with them <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s -->

 

Exup valve history....

I can say I rode a bike with the exup... but no delta box.... (the fzr's were the first bikes to have the exup valve, first being used in '88 I think - at this time the 400+ fzrs had deltabox, but the 250 still had steel frame and this changed sometime in 1989).

Prior to this Yamaha had their 'ypvs' (yamaha power valve system). It was effective, though not as effective as the exup. It was pretty much an identical valve system, but wasn't placed as strategically as the exup. It was actually located in/around the combustion chamber.

Since the conception of the exup several other bike manufacturers have followed suit and now have similar valves on their bikes too.

So, as Jarmizz said - you have a piece of history with the fzr - the introduction of one of the simplest/most successful mechanical upgrades to sport bikes. (the deltabox being another...)

 

lol

Yea cool.
The YPVS worked better on the 2 strokes rather than the 4 strokes. In the NSR500 and all other 2 stroke race bikes followed the EXUP or YPVS back then and they loved it. Honda had there "power valves" up by the engine block on there own extractors.

Its a very interesting way of "squezing" out more bottom end power.

 

hey guys i hate to spoil the party but i own both a fzr 3ln1 and a cbr single r 250 with the chain driven cam fzr does take off a little harder maybe half a bike length in it so they can compare that way but hit the turns and the fzr does not have anything on the cbr . different seat position ride height cbr was about 3 seconds quicker round the track and thats both bikes tuned to perform

 

Engine maybe but you also have to think about the suspension. You may find that if you got a pro to set up the suspension for you as an individual your times will drop away at the track.

 

i used to ride with anthony west back when he road for top rider on the gold coast and we learnt how to set bikes up for track days if you have ever ridden both biked the f zr is a little better in a straight run but the centre of gravity on a cbr is about half a foot lower than the fzr so of course it is going to handle better and you dont have to fight the bike in the turns as much but hey they are both 250 s and its not hard to make them go where you want them too i like both bikes thats why i have both