/ Register

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Matt's CBR250RR(N) 1993

Discussion in 'Your 250cc Projects' started by MCiN7, Jun 4, 2015.

Page 3 of 4
  1. Damus

    Damus She is a BEAST and riding it is comparable to sex Dirty Wheel Club

    Messages:
    1,055
    Likes Received:
    426
    Trophy Points:
    493
    Joined:
    Mar 22, 2015
    Gender:
    Male
    Occupation:
    I.T.
    Location:
    Sydney, NSW
    My Bike:
    Honda CBR250RR
    Damus, Jun 24, 2015
    #41
  2. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,737
    Likes Received:
    2,883
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    FZR250R 3LN6
    EBC "CK" series is standard cork plates. For that price you can find an EBC "SRK" series which is a complete kit with kevlar lined plates, steel separator plates & clutch springs.

    Alternatively, @Grasshopper can get you the CK kit for a lot cheaper. Less than $100
     
    • Like Like x 1
    Linkin, Jun 24, 2015
    #42
  3. MCiN7

    MCiN7 Well-Known Member

    Messages:
    94
    Likes Received:
    143
    Trophy Points:
    248
    Joined:
    Dec 24, 2014
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    GSX250F
    Ebay as well from O.S - they are a hit or miss with shipping though as some arrive bent.
     
    • Like Like x 1
    MCiN7, Jun 24, 2015
    #43
  4. MCiN7

    MCiN7 Well-Known Member

    Messages:
    94
    Likes Received:
    143
    Trophy Points:
    248
    Joined:
    Dec 24, 2014
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    GSX250F
    Almost done what I've wanted...added some Carbon to the cluster - for some reason only one of my pins came out so I needed to add slits to the cover to get them over the remaining two pins. One part of it cracked but I don't mind!

    IMG_20150625_191407.jpg


    Also touched up my wheels with a black paint marker, no more white chips/scratches!

    To go:
    Front braided lines
    Remove corrosion and paint fork lowers
    Clean and paint rear brake calliper
    Rebuild/clean carbs, upgrade to 110/108 main jets
    Spark plugs
    Thermostat
    Rocker cover gasket
    Paint extractors/downpipe
     
    • Like Like x 5
    MCiN7, Jun 25, 2015
    #44
  5. Mclaren

    Mclaren Well-Known Member Contributing Member

    Messages:
    1,971
    Likes Received:
    939
    Trophy Points:
    698
    Joined:
    Jul 31, 2013
    Gender:
    Male
    Location:
    Brisbane
    My Bike:
    cbr250rr
    With disc go metal gear made in brendale Brisbane have seen the Chinese ones collapse not nice
     
    Mclaren, Jun 25, 2015
    #45
  6. MCiN7

    MCiN7 Well-Known Member

    Messages:
    94
    Likes Received:
    143
    Trophy Points:
    248
    Joined:
    Dec 24, 2014
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    GSX250F
    Done the forks and exhaust, finish on the forks is not the best but at least the corrosion is gone.

    11659356_1678879022342119_1317543521016706489_n (1).jpg
    11058761_1678879052342116_6915342798823786539_n.jpg


    Slowly it's looking and performing better, I like doing this stuff, it's all a learning progress but it's so much easier to work on motorcycles than cars.

    I'm going to do the 20 cent mod on the forks (just one in each) and see how I like it. I have no idea what the rear shock is set to so I'll check that out too.
     
    • Like Like x 5
    MCiN7, Jun 29, 2015
    #46
  7. MCiN7

    MCiN7 Well-Known Member

    Messages:
    94
    Likes Received:
    143
    Trophy Points:
    248
    Joined:
    Dec 24, 2014
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    GSX250F
    Small update
    Front braided lines have been fitted - this is definitely one of the better modifications that I've done

    Spark plugs changed for good measure

    Carbs have been rebuilt and 110 108 108 110 jets fitted, pilot at 2screws as per someone else who had their bike on the dyno, AFR's were good. May not be the case with my bike but soon will find out.

    Changed the thermostat and the bike, still doesn't get up to temp while moving always creeps back to just above the T, sometimes even below - one would think it still should get warmer while moving even in winter.
    I thought the old one was stuck open but it wasn't.

    I've cleaned around the rocker cover gasket - will inspect over time as I've got a gasket set sitting here. When I done the plugs I now believe it was just dirt/grime built up on top and has seeped down.

    Just need to finish polishing the frame once I've got time and that's about it!
     
    • Like Like x 4
    MCiN7, Jul 12, 2015
    #47
  8. Phil

    Phil Senior Member Contributing Member

    Messages:
    3,613
    Likes Received:
    1,549
    Trophy Points:
    923
    Joined:
    Aug 8, 2010
    Gender:
    Male
    Occupation:
    M C E
    Location:
    Sunshine Coast Qld
    Home Page:
    My Bike:
    Suzuki GT250X7 Kawasaki ZZR600
    You've done well, bike looks the goods........time to ride:thumb_ups:
     
    • Like Like x 1
    Phil, Jul 12, 2015
    #48
  9. kiffsta

    kiffsta Senior Member

    Messages:
    9,066
    Likes Received:
    6,872
    Trophy Points:
    1,168
    Joined:
    Aug 7, 2010
    Gender:
    Male
    Location:
    Brisbane
    • Like Like x 2
    kiffsta, Jul 14, 2015
    #49
  10. MCiN7

    MCiN7 Well-Known Member

    Messages:
    94
    Likes Received:
    143
    Trophy Points:
    248
    Joined:
    Dec 24, 2014
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    GSX250F
    Okay so bike went on the dyno today, I'm running rich, it's low 12's idle, 1/4, 1/2, 3/4 and full throttle.

    There's no flat spots which I'm happy with

    afr.JPG hptq.JPG
     
    • Like Like x 1
    MCiN7, Jul 17, 2015
    #50
  11. Damus

    Damus She is a BEAST and riding it is comparable to sex Dirty Wheel Club

    Messages:
    1,055
    Likes Received:
    426
    Trophy Points:
    493
    Joined:
    Mar 22, 2015
    Gender:
    Male
    Occupation:
    I.T.
    Location:
    Sydney, NSW
    My Bike:
    Honda CBR250RR
    This is with uni filter?
     
    Damus, Jul 17, 2015
    #51
  12. MCiN7

    MCiN7 Well-Known Member

    Messages:
    94
    Likes Received:
    143
    Trophy Points:
    248
    Joined:
    Dec 24, 2014
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    GSX250F
    Yep, Unifilter, Shorty bolt on, 110 108 108 110 mains. Pilot at 2 turns, odo at 785##km's
     
    MCiN7, Jul 17, 2015
    #52
  13. Damus

    Damus She is a BEAST and riding it is comparable to sex Dirty Wheel Club

    Messages:
    1,055
    Likes Received:
    426
    Trophy Points:
    493
    Joined:
    Mar 22, 2015
    Gender:
    Male
    Occupation:
    I.T.
    Location:
    Sydney, NSW
    My Bike:
    Honda CBR250RR
    And it shows up rich? That's insightful news. I wasnt expecting u to roll with 2 turns out. would have love to known results at stock turns.

    if that's the case I might run some 8 5 5 8's with 1 & 3.5quater turns out balanced with 1 washer.
    Very helpful indeed. Thanks!
     
    Damus, Jul 17, 2015
    #53
  14. kiffsta

    kiffsta Senior Member

    Messages:
    9,066
    Likes Received:
    6,872
    Trophy Points:
    1,168
    Joined:
    Aug 7, 2010
    Gender:
    Male
    Location:
    Brisbane
    How much was the Dyno Matt ?
     
    kiffsta, Jul 17, 2015
    #54
  15. Mclaren

    Mclaren Well-Known Member Contributing Member

    Messages:
    1,971
    Likes Received:
    939
    Trophy Points:
    698
    Joined:
    Jul 31, 2013
    Gender:
    Male
    Location:
    Brisbane
    My Bike:
    cbr250rr
    That's pretty good man
     
    Mclaren, Jul 17, 2015
    #55
  16. MCiN7

    MCiN7 Well-Known Member

    Messages:
    94
    Likes Received:
    143
    Trophy Points:
    248
    Joined:
    Dec 24, 2014
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    GSX250F
    $120 for 6 runs, could have got a $55 run somewhere else but it's a fair bit out of the way.

    I'm not sure if I want to run slightly smaller main jets to try get it to run slightly leaner or what - you lot got any ideas?
    I could try 108 105 105 108
     
    MCiN7, Jul 19, 2015
    #56
  17. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,111
    Likes Received:
    3,478
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    First of all that looks like a good result right from the get go. Is there a rev limiter kicking in at some rpm? Just asking because of the 13.5 AFR at the end.

    "For most spark ignition engines, there is a specific small window of AFR in which maximum horsepower and best throttle response will be found. For gasoline, that range is 12.5 to 13 AFR." http://www.ngksparkplugs.com/pdf/afx_tuning_manual_rev_06.pdf

    There is a limit as to what can be done here because of the options available to tune the carburettor and the dyno type. At half throttle with a variable load is a lot different on a brake dyno to that of an acceleration run on a rolling road.

    What would I do? Well it would be nice to try some different needles to address the lean area at 7000, but I am sure they will not be available. If you do make any changes then one change at a time of course.
    cheers
    Blair
     
    • Like Like x 2
    maelstrom, Jul 19, 2015
    #57
  18. Damus

    Damus She is a BEAST and riding it is comparable to sex Dirty Wheel Club

    Messages:
    1,055
    Likes Received:
    426
    Trophy Points:
    493
    Joined:
    Mar 22, 2015
    Gender:
    Male
    Occupation:
    I.T.
    Location:
    Sydney, NSW
    My Bike:
    Honda CBR250RR
    Based on the fact the pilot screw affect the whole throttle range is just return them to the stock setting and balance the carbs in your situation. Main jets are close enough to perfect.
     
    Damus, Jul 19, 2015
    #58
  19. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,929
    Likes Received:
    6,720
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Between a Rock and a Hard Place
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Yamaha FZR400 *Triumph Bonneville 750 T140V *Triumph Daytona 675 *Triumph Tiger 800XC
    carb_jet_usage1.jpg jet-chart.jpg
     
    • Like Like x 3
    GreyImport, Jul 19, 2015
    #59
  20. aky141

    aky141 Well-Known Member

    Messages:
    196
    Likes Received:
    122
    Trophy Points:
    248
    Joined:
    Jan 18, 2014
    Gender:
    Male
    Location:
    Kempsey, New South Wales
    My Bike:
    Yamaha DT200R, Honda NSR250SE
    Schooled
     
    • Like Like x 2
    aky141, Jul 19, 2015
    #60
Page 3 of 4

Share This Page