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New Member CBR250RR racer in California

Discussion in 'New Members Say Gday' started by Dave Moss Tuning, Dec 31, 2015.

  1. Dave Moss Tuning

    Dave Moss Tuning Member

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    Hi everyone,

    I've been racing a 250RR MC22 for the last couple of years with the American Federation of Motorcyclists which is the oldest racing club in the US). I've managed to win a championship with that bike and come second in the class.

    With the introduction of the 300's the rumor is that the Yamaha R3 should put down 50bhp to the rear wheel so all the old parts went away for cryo and other treatments. The new race engine will be put together in January 2016 and we will be making some major modifications to it to try to get our minim blade to 50bhp to the rear wheel. MC19 cams are a big part of the improvement.

    To that end I am on a quest for information especially in regards to seeing if there was ever an HRC Manual for these engines? The engine builder is asking.......(and that isn't me lol).

    I'm hoping to fight for another 250 Superbike Championship in 2016 so any help would be greatly appreciated!
     
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    Dave Moss Tuning, Dec 31, 2015
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  2. risky

    risky risky

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    welcome.
     
    risky, Dec 31, 2015
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  3. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    maelstrom, Dec 31, 2015
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  4. thebeefsalad

    thebeefsalad Well-Known Member

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    Howdy Dave!
     
    thebeefsalad, Dec 31, 2015
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  5. KICKERMAN360

    KICKERMAN360 Well-Known Member

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    I've never seen any HRC parts for the MC22. I don't think there was even a HRC Jet Kit for it. Despite being an RR model (and one of the few bikes that wasn't a CBR1000RR to be called a Fireblade), it was never really a race derived production bike. So you'll have to figure it out yourself! I can't see a R3 making 50HP when most 450cc dirt bikes barely even hit 45HP though.
     
    KICKERMAN360, Dec 31, 2015
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  6. mboddy

    mboddy Well-Known Member Premium Member Contributing Member

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    I always thought the engine was a modern reproduction of the Honda RC162.
    The RC 162 was a very important machine to Honda being the first Honda to win a grand Prix with a Japanese rider when Kunimitsu Takahashi won the German 250cc GP, July 24, 1961 at Hockenheimring.
     
    mboddy, Dec 31, 2015
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  7. KICKERMAN360

    KICKERMAN360 Well-Known Member

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    Could be. I thought it was to do with Japanese law regarding learner bikes and they were trying to give their domestic market some small displacement bikes with relatively high outputs (hence the other I4 250s from Yamaha and Suzuki). Which is pretty much why the CBX was 6 cylinder too, to get a higher horsepower per displacement unit (although in this case it was the 'battle of speed' between manufacturers and Honda thought 6 cylinder was a good idea (not really)). Nonetheless, the MC22 engine is from the MC14 and is relatively unchanged from my understanding. Most (if not all) the differences are in the design of the head and there really isn't much between the MC19 and MC22. Not enough to really retrofit one head to another anyway for most people. A great engine, reliable and a marvel of engineering in many ways but not a race derived bike like the NSR250 (which used engine designs very similar to the RS250s of the same age) or RC30 and RC45 which were designed by HRC.
     
    KICKERMAN360, Dec 31, 2015
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  8. Mclaren

    Mclaren Well-Known Member Contributing Member

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    Don't be fooled the top mc22 racers here go fastest than the ninja 300 I imagine r3 much the same
    My race mc22 is around 45/46hp and standard as we can't touch motor and still pulls hard
    We had 20 mc22 on grid last round and 33 over the season image.jpeg image.jpeg
     
    Mclaren, Dec 31, 2015
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  9. kiffsta

    kiffsta Senior Member

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    There is a hrc cdi for the mc22 , its a very small improvement over stock
     
    kiffsta, Dec 31, 2015
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  10. Dave Moss Tuning

    Dave Moss Tuning Member

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    Hi Blair. I'm running the stock carbs at this point (different jets obviously) so I'm open to more information on better fueling if there are flat slides available. Thank you.
     
    Dave Moss Tuning, Dec 31, 2015
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  11. Mclaren

    Mclaren Well-Known Member Contributing Member

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    There is a set cant remember name but they roughly 1500 for a set and think not much gain have u upgraded suspension
     
    Mclaren, Dec 31, 2015
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  12. Dave Moss Tuning

    Dave Moss Tuning Member

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    Thanks for all the welcomes and insights.

    The MC19 cams give a little more than the 22's so I'm certainly going to take advantage of that. There are some other tricks that can be used on the gear driven motors apparently, so I'm optimistic about gains over stock. Enhanced ignition will help as well as featured in another 250 forum by Motthomas with the possibility of FCR flat slides existing to replace the stockers we are using now. I'm even looking at full fuel injection as a budget item with a local expert who also does Bonneville land speed bikes. All in all I'm sure we can get to 50bhp with good knowledge and sensible approaches to reliability.

    The first race is in March and the bike should be ready by the end of February.

    I can assure you that anything I learn will be shared for the benefit of all :)
     
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    Dave Moss Tuning, Dec 31, 2015
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  13. Dave Moss Tuning

    Dave Moss Tuning Member

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    Y
    The bike is far from stock at this point so I could not enter it into the Classic at Phillip Island (so is my VFR428 as well for that matter). I'll do a breakdown next week of the 250.
     
    Dave Moss Tuning, Dec 31, 2015
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  14. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    :welcome: Dave.
    R3 @ 50hp could just be a rumor put out by the Yamaha riders?
     
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    Murdo, Dec 31, 2015
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  15. Moo

    Moo Plodge Racing!!!

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    Welcome!
     
    Moo, Dec 31, 2015
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  16. Mclaren

    Mclaren Well-Known Member Contributing Member

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    U can but it be in unlimited class against modified bikes
     
    Mclaren, Dec 31, 2015
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  17. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Contact Marc Salvisberg at Factory Pro in the US http://www.factorypro.com/ he will be be able to set you straight on setting up a set of FCR's. Tuned correctly they will make a big difference. In fact if I was in your position I would be booking time with him to set them up on his Dyno. He would have forgotten more than most mortals about tuning race bikes.
    FCRs are available from Webike. Yes they are expensive but it is bolt on power and racing costs money.
     
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    maelstrom, Dec 31, 2015
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  18. Brizfox

    Brizfox Well-Known Member Premium Member Contributing Member

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    wow.....and welcome.
     
    Brizfox, Dec 31, 2015
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