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Project My Fizzer

Discussion in 'Your 250cc Projects' started by GreyImport, Sep 24, 2012.

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  1. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Its a fail
    It idles but revs are all over the shop
    It jumps from practically nothing and reached 16,000 for a second but its much the same
    Must be the coils .... all headers were the same temp

    :headbang:



    #1

     
    • Bummer Bummer x 1
    Last edited: Mar 14, 2022
    GreyImport, Mar 14, 2022
    #1081
  2. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Hi Chief,
    Sorry, the merge chamber bung o-rings are not used elsewhere in Fizzers. I will be Mr Brown-Blue soon. We will continue to use the Fluorosilicone (blue) o-rings for what I consider mission critical locations. The rest is all going to 70% Flourine FKM (Viton GF series if you are looking for what that means).
    Cheers
    Blair
     
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    maelstrom, Mar 14, 2022
    #1082
  3. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Pilot circuit in the carbs might be blocked too, or did you throw them in the ultrasonic tank?
     
    maelstrom, Mar 14, 2022
    #1083
  4. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    No I didnt seperate them .... I pulled off/out everything possible including the bung and sprayed then compressed aired everything and watched all the exits as I did it ... not perfect but ...

    While testing for spark with no coil on #1 and no fuel left in the mini bottle , it started first go and idled ... go figure!
    So plenty of spark on all 4
    Im thinking new plugs are next .... alot of ether went down the intakes and old fuel was still in the carbs during the first starting attempts the other day
     
    • Agree Agree x 1
    GreyImport, Mar 14, 2022
    #1084
  5. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    I have had instances on Chevy v8 where lots of ether literally killed a set of expensive Irridium plugs...coughed a few times so sprayed more... then swapped out the plugs for an old crappy set of standard 350 plugs and she ran like a top... allowed me to run in the cam at 2000 rpm for 20 minutes... ahhh the good old days :)
     
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    Andych, Mar 14, 2022
    #1085
  6. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    "Mr Green/Blue .... your o rings are holding up well .... its nearly 10 years since I initially did these carbs"
    Yes, once we have sold a kit to every owner on Earth we will have to shut down, but by that time I will have 1000 subscribers on YouTube and will be paid 38 cents a month. :)
     
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    maelstrom, Mar 14, 2022
    #1086
  7. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    New plugs ... CR9Es as I had a new set on hand

    Starts and idles nicely but doesnt rev out .... the slides are "jittery" so theres something going on there

    I just spent 3 hours re attaching a COPS plug .... another tip for young players ... dont pull out coil packs before unplugging the harness

    Im done with this pile of scrap metal :commando:
     
    • Bummer Bummer x 2
    Last edited: Mar 14, 2022
    GreyImport, Mar 14, 2022
    #1087
  8. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Lets put some of this back together and try it .... I LOVE CARBS!

    IMGP0242.JPG
     
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    GreyImport, Mar 15, 2022
    #1088
  9. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    You have to admit, you must be damn good at them by now.
     
    maelstrom, Mar 15, 2022
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  10. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    That's how I feel about my 3D printer. There is so much of it that has been replaced that I call it Franken-Printer now.
     
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    maelstrom, Mar 15, 2022
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  11. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Yea thats why Im going again now ..... not sure if u can become "good" at Mikunis , but its second nature these days :lolsign:

    Thanks to @Linkin buying 101 Litetek kits in his days learning his craft at the old Fizzer Factory , and leaving half of them behind , Im finding most of the needed o rings :D

    IMGP0243.JPG
     
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    GreyImport, Mar 15, 2022
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  12. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    So are you putting together another set here?
     
    maelstrom, Mar 15, 2022
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  13. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Affirmative
     
    GreyImport, Mar 15, 2022
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  14. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    @maelstrom

    I found these .... are they the first issue merge chamber o rings?

    IMGP0245.JPG

    merge chamber o ring.jpg
     
    GreyImport, Mar 16, 2022
    #1094
  15. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    No, they were a mistaken belief that the float valve o-rings were too loose. Don't use them.
     
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    maelstrom, Mar 16, 2022
    #1095
  16. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Well they look pretty but do they work ? .... no they dont

    It starts and it revved out to 16000 and blew out a massive fireball but its 'idling' at 6/7000 rpm and wont drop
    The other carbs idled nicely but nothing more :headbang:


    IMGP0248.JPG IMGP0249.JPG IMGP0251.JPG IMGP0254.JPG IMGP0256.JPG
     
    • Bummer Bummer x 1
    Last edited: Mar 16, 2022
    GreyImport, Mar 16, 2022
    #1096
  17. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Idles at 6/7000RPM with the butterflies closed at idle - air leak at manifolds or butterflies not actually closed to idle [opening] - stuck open a bit?

    Won't take much of an excess opening of the butterflies to idle that high BTW
     
    ruckusman, Mar 16, 2022
    #1097
  18. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Might need a vacuum balance?
     
    Linkin, Mar 16, 2022
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  19. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    I bench synced them .... and the butterflies are snapping shut via the throttle (not running)

    Might need a visit to the crusher :minigun:


    Edit : so I just started it from scratch , no throttle , no choke and it climbed to like 4000+ in a an instant before I shut it down :idk:
     
    Last edited: Mar 16, 2022
    GreyImport, Mar 16, 2022
    #1099
  20. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Idle adjustment it it's idling that high - won't take much of an opening to be able to rev that high
     
    ruckusman, Mar 16, 2022
    #1100
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