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Thread: Performance upgrades for 250s

  1. #31
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    30th September 2004 - 20:08
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    Quote Originally Posted by SimJen View Post
    Its not a case of "dont waste your money" but if you mess around to much without the knowledge/ability, then your finely tuned and well performing 250 will put out less power and be harder to ride.
    I made my 250 go faster, so meh! A' course, it guzzled fuel like crazy afterwards...
    Think boi racers with 1.6litre non-turbo cars and 3" exhaust systems losing around 20% of their power to no back pressure.......but it looks cool
    Actually, I think you'll find it's the increased mass of the exhaust gas that makes the exhaust gas too heavy for those little engines to move out of the pipes at 'normal' revolutions. Hence the spot where the scavenge kicks in has moved further up the rev-range, and possibly to a useless spot beyond peak power with standard cams and fuelling. An exhaust shop worth a few dollars should probably inform boy racer that 3" all the way from the manifold (Or extractor of they have spent the dosh) to the tip of the pipe is silly, and would sir like a 2" pipe running the length of the car plus a dinner plate at the end of the pipe for vanity?
    Even if you could get a few mods for the motor, its not going to give more than an extra couple of horses. Which odds are you'll be unlikely to feel, as it will inevitably lead to a loss in bottom end torque.
    Concentrate on riding better and getting the most from the bike.
    Not true, the engine could have designed in dead spots. Take my RVF400 for example, it's got a horrible bloody hole till about 7000rpm that is easily fixed, and tapers off at about 12,000rpm where it should not. Put in an HRC CDI and you fix get a bit more oomph at the top. The HRC CDI made a difference, I stopped hitting the limiter all the time once I fitted it. Also said vehicle is electronically limited to 180km/h, and this restriction can also be removed.
    Learning to ride the wheels off an underpowered bike will give you skills you will use all your life.
    That I can't disagree with.

  2. #32
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    23rd April 2004 - 19:16
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    Quote Originally Posted by xerxesdaphat View Post
    What's a two-stroke conversion kit?
    a piss take
    KiwiBitcher
    where opinion holds more weight than fact.

    It's better to not pass and know that you could have than to pass and find out that you can't. Wait for the straight.

  3. #33
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    Quote Originally Posted by hurricane_r View Post
    how to dereistric ignition?, iv heard some cdi's have 1st gear limiters? is this that
    for later model bikes they have electronic fuel injection and computers that run the engine etc. These are generally limited in the first few gears for 'stupid' people that can't handle the power (talking superbikes etc here)

    for the 250's they'll have an ignition cut out at around 180kmh... tristans bike was dynoed to 204kmh as he has a 'black box' that tricks his bike in to thinking it never goes over 180kmh.

    If you have a restricter you'll know because you'll hit 'the wall', more to the point you'll stop accelerating all of sudden at around 180kmh instead of just running out of steam.
    KiwiBitcher
    where opinion holds more weight than fact.

    It's better to not pass and know that you could have than to pass and find out that you can't. Wait for the straight.

  4. #34
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    3rd August 2006 - 19:35
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    160+ on a naked bike feels fast enough thanks
    Quote Originally Posted by NinjaNanna View Post
    Wasn't me officer, honest, it was that morcs guy.
    Quote Originally Posted by Littleman View Post
    Yeah I do recall, but dismissed it as being you when I saw both wheels on the ground.
    Quote Originally Posted by R6_kid View Post
    lulz, ever ridden a TL1000R? More to the point, ever ridden with teh Morcs? Didn't fink so.

  5. #35
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    22nd December 2004 - 20:50
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    If you think going 160km/h on a naked is fast, you should try passing people at 120kmh on an fxr. That takes real skill.

  6. #36
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    I used to pass people of my 180cc scooter at 130+, and that only had 14'' wheels
    Quote Originally Posted by NinjaNanna View Post
    Wasn't me officer, honest, it was that morcs guy.
    Quote Originally Posted by Littleman View Post
    Yeah I do recall, but dismissed it as being you when I saw both wheels on the ground.
    Quote Originally Posted by R6_kid View Post
    lulz, ever ridden a TL1000R? More to the point, ever ridden with teh Morcs? Didn't fink so.

  7. #37
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    22nd December 2004 - 20:50
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    Lol your 180cc scooter has 120% of the displacement of my bike though.
    But yeah... 14", remember seeing the BRM issue that had the Gilera(?) in it, 650cc, top speed of about 170k's... all on small tyres. scary.

  8. #38
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    I used to overtake Michael Schumacher in his F1 car on the motorway every morning, lanesplitting miles of cars commuting at 200km/h, erratically switching lanes, on my 50cc Suzuki Sepia ZZ.



    p/t
    .
    .
    "All that is necessary for the triumph of evil is that good men do nothing." Edmund Burke

  9. #39
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    Oh yeah... mods for a 250...

    an extra 350cc...
    .
    .
    "All that is necessary for the triumph of evil is that good men do nothing." Edmund Burke

  10. #40
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    Quote Originally Posted by Bend-it View Post
    I used to overtake Michael Schumacher in his F1 car on the motorway every morning, lanesplitting miles of cars commuting at 200km/h, erratically switching lanes, on my 50cc Suzuki Sepia ZZ.
    You sound like skidMark. Are you his alter-ego who dwells further south?

    There's some people on here who've bored their nsr's out to 300cc I think...

  11. #41
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    Quote Originally Posted by jeremysprite View Post
    There's some people on here who've bored their nsr's out to 300cc I think...
    TYGA Performance make a kit
    http://tyga-performance.com/site/pro...089a5df7d73b34

    And there's a guy selling them in NZ
    www.dsracing.com

    As much as I would like a 600, I'm thinking of upgrading to a 400 and modding the hell out of that. Twin intercooled turbos, Nitrous, adjustable suspension, Carbon Fibre fairings, the works. I plan to make/install them myself (at least try to). That'll be cheaper and I don't want a trained mechanic or specialist spoiling my fun

  12. #42
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    Quote Originally Posted by SimJen View Post
    A set of NSR forks would be perfect.....and possibly the shock could be made to fit too??
    Point in that is what? They're the same, aren't they?

    Best performance mod for any bike, is learn to ride the fucker properly first. Don't start dicking with performance mods, before you can ride. And for a 250, a diet.

    Peace hath higher tests of manhood

    than battle ever knew.

  13. #43
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    Quote Originally Posted by hXc View Post
    Point in that is what? They're the same, aren't they?

    Best performance mod for any bike, is learn to ride the fucker properly first. Don't start dicking with performance mods, before you can ride. And for a 250, a diet.
    That's easy for you to say - you're about 12 years old with the metabolism of a cheetah...what about us fat ol' fuckers that have still got 2 months of restricted service to go?
    In space, no one can smell your fart.

  14. #44
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    22nd December 2004 - 20:50
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    Quote Originally Posted by Coyote View Post

    As much as I would like a 600, I'm thinking of upgrading to a 400 and modding the hell out of that. Twin intercooled turbos, Nitrous, adjustable suspension, Carbon Fibre fairings, the works. I plan to make/install them myself (at least try to). That'll be cheaper and I don't want a trained mechanic or specialist spoiling my fun
    Make your project an XV400

    Or Turbo a pocket bike, then sell it as a Moped/learner license bike.
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  15. #45
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    Quote Originally Posted by McJim View Post
    what about us fat ol' fuckers that have still got 2 months of restricted service to go?
    Put in some more k's on that Campag groupset you keep talking about..

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