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Thread: cbr250rr modifications

  1. #1
    Join Date
    14th January 2007 - 20:00
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    cbr250rr modifications

    Is there any modifications a can do to my mc22 to give it more power? if i opened up the airbox slightly and put air intake into the box would it do anything or just make it run to lean? i think they squeeze all the power they can out of these little motors but there must be something else i can do. its got a smaller front sprocket and an aftermarket can already.

  2. #2
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    28th September 2004 - 23:00
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    1992 VFR400R, 2007 SV650 Pro Twin
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    You serious about mods. Ask the guys at www.cr-x.org/cbr250/

    In reality, I always raced the mc22 as standard and I won a lot of races on them. Even in Aussie where people were allowed mods and there were plenty of major mods done. The best mod you can do is to your own riding ability, get some track time.

    If you play with the air flow ala exhaust/intake free flowing, you'll need to play with the jetting too, which is all too much of a pain in the arse in my opinion. They run awesome from standard, and are very reliable don't fuck with them.

  3. #3
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    14th January 2007 - 20:00
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    oh yea. sweet as thanks for your input. yea its a mint runner aye and faster than any of my mates 250s and realible as hell. just want a bit more out of it aye. i can get my full now so might be easier to just upgrade.

  4. #4
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    3rd October 2004 - 17:35
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    yeah mate you can do lots.

    You can rip the aribox off completely put in a full exhaust system and wack 145 main jets in ur carb and get it balanced it'll run pretty damn sweet and sound SOOOOOOOOOOOOOO good.

    You can remove the 180km/hr limiter really easily, its just cutting a wire and adding in a resistor.

    then you can play with the cam etc

    you wont gain mega hp out of it, i think you'd only be able to get 40-45 at the wheel max.

    unless you run a nitro mix in ur petrol
    Then I could get a Kb Tshirt, move to Timaru and become a full time crossdressing faggot

  5. #5
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    18th October 2007 - 08:20
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    Quote Originally Posted by renegade master View Post
    yeah mate you can do lots.



    you wont gain mega hp out of it, i think you'd only be able to get 40-45 at the wheel max.
    hmmm, dunno about 40-45 hp there mate.

    I have operated dyno's for the last 8 years or so, and the most I have seen on any 250 I.L.F is 35 HP. Most are 32HP

    45 HP is quite a bit!

    a good road going I.L.F 400 will only make 60HP, most are around 55HP

  6. #6
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    Quote Originally Posted by SS90 View Post
    hmmm, dunno about 40-45 hp there mate.

    I have operated dyno's for the last 8 years or so, and the most I have seen on any 250 I.L.F is 35 HP. Most are 32HP

    45 HP is quite a bit!

    a good road going I.L.F 400 will only make 60HP, most are around 55HP
    i reckon 10 extra hp is possiable with mods?
    Then I could get a Kb Tshirt, move to Timaru and become a full time crossdressing faggot

  7. #7
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    Quote Originally Posted by BladeBoy View Post
    Is there any modifications a can do to my mc22 to give it more power? if i opened up the airbox slightly and put air intake into the box would it do anything or just make it run to lean? i think they squeeze all the power they can out of these little motors but there must be something else i can do. its got a smaller front sprocket and an aftermarket can already.
    http://www.trademe.co.nz/Browse/List...x?id=246956229

    stack load of mc22 parts forsale
    Then I could get a Kb Tshirt, move to Timaru and become a full time crossdressing faggot

  8. #8
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    13th December 2008 - 18:22
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    Get a turbo for it.

  9. #9
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    RE: Mr.Dyno reporting 35hp L-4's, did the manufacturers take the HP readings from the crank?
    Some people just can't seem to comprehend that they do not have the right to be unoffended in their lives.
    Quote Originally Posted by Fatt Max View Post
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  10. #10
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    10th December 2008 - 07:39
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    Quote Originally Posted by SS90 View Post
    a good road going I.L.F 400 will only make 60HP, most are around 55HP
    how bout a v4 ?
    Quote Originally Posted by sil3nt View Post
    Fkn crack up. Most awkward interviewee ever i reckon haha.

  11. #11
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    4th May 2006 - 22:17
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    Quote Originally Posted by Blackshear View Post
    RE: Mr.Dyno reporting 35hp L-4's, did the manufacturers take the HP readings from the crank?
    Fairly sure they all do unless otherwise stated.

  12. #12
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    27th March 2008 - 21:19
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    A friend's CBR250RR made 44RWHP when it was dyno'd about a month ago.

    Not saying there couldn't have been dyno error, but the dyno seemed about right with the other bikes on it.
    They were an '03 GSXR600 making 103 and a Bandit 250 making 35ish but it was running averagely.


    You could always just take off the can entirely, makes quite a sound from personal experience!

  13. #13
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    Quote Originally Posted by McWild View Post
    A friend's CBR250RR made 44RWHP when it was dyno'd about a month ago.

    Not saying there couldn't have been dyno error, but the dyno seemed about right with the other bikes on it.
    They were an '03 GSXR600 making 103 and a Bandit 250 making 35ish but it was running averagely.


    You could always just take off the can entirely, makes quite a sound from personal experience!
    Like I say, I have never seen more than 35HP from an ILF 250.

    You can argue about results till your blue in the face, and at the end of the day it is all Academic.

    Do you have a printout available for your mates 44 HP run?

    I have just Googled for the last 20 mins, and all I have come up with is this......

    It always impressed me that the CBR's (later model ones) where more powerful than the ZXR's (I expected the other way round), but like I say, I never saw more than 35 HP.

    I guess it is down to the model though, and obviously I have not "seen them all", if anyone can furnish a dyno run for a CBR250 I would love too see it!

    44Hp is quite a bit!

    Although, I do remember that some later models revved to something like 20K, that's quite a bit, but at revs like that you suffer down low......
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  14. #14
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    Tyres and suspension mate.

    Steve
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    "read what Steve says. He's right."
    "What Steve said pretty much summed it up."
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    WTB: Hyosung bikes or going or not.

  15. #15
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    Quote Originally Posted by SS90 View Post
    Like I say, I have never seen more than 35HP from an ILF 250.

    You can argue about results till your blue in the face, and at the end of the day it is all Academic.

    Do you have a printout available for your mates 44 HP run?

    I have just Googled for the last 20 mins, and all I have come up with is this......

    It always impressed me that the CBR's (later model ones) where more powerful than the ZXR's (I expected the other way round), but like I say, I never saw more than 35 HP.

    I guess it is down to the model though, and obviously I have not "seen them all", if anyone can furnish a dyno run for a CBR250 I would love too see it!

    44Hp is quite a bit!

    Although, I do remember that some later models revved to something like 20K, that's quite a bit, but at revs like that you suffer down low......
    I can ask him to take a photo of it or scan it and post it up (or I will) when I get the chance. I think it would be interesting to get it run at a different place as well but really it's just not worth the money for a simple comparison.
    I have to say that it does feel like it has a bit more pull than the last MC19 I rode.

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