Runner engine strip down and re-build

Discussion in 'Scooter Projects' started by capri dave, Dec 8, 2007.

Page 5 of 8
  1. capri dave

    capri dave Active Member

    Messages:
    5,076
    update :D
     
    capri dave, Feb 26, 2008
    #81
  2. kyle1b1

    kyle1b1 New Member

    Messages:
    5,191
    :banana:

    sweet dave ! will be running soon :cool:
     
    kyle1b1, Feb 26, 2008
    #82
  3. Jamie

    Jamie Active Member

    Messages:
    5,370
    Rides:
    xt660x, 200sx s14a
    looking good dave
     
    Jamie, Feb 26, 2008
    #83
  4. lol

    lol New Member

    Messages:
    964
    u have done this well fast good to se the engine in the bike i defo want b to see a vid of this beast ;)
     
    lol, Feb 26, 2008
    #84
  5. shiny red

    shiny red New Member

    Messages:
    1,224
    have you had it running dave ,been out yet????????
     
    shiny red, Mar 8, 2008
    #85
  6. capri dave

    capri dave Active Member

    Messages:
    5,076
    yep had it running gaz ;)

    still useing the x-pro and 20.5mm carb...and i had to send my stage6 gear-up back as i ordered the earlier one by mistake :emb:

    But!!!! i havent really ragged it yet, and its not set up properly yet,

    so far seems really really torquey...and sounds different too :D

    in the words of my son "if you didnt know, you would think it was a 125 when you see it go" :cool:
     
    capri dave, Mar 8, 2008
    #86
  7. capri dave

    capri dave Active Member

    Messages:
    5,076
    UPDATE!!!
    video added :w00t:
     
    capri dave, Mar 16, 2008
    #87
  8. capri dave

    capri dave Active Member

    Messages:
    5,076
    get back to page 1 ^^^^^^

    for secret minor confusion exhaust modification ;)
     
    capri dave, Mar 21, 2008
    #88
  9. monty9120

    monty9120 Active Member

    Messages:
    3,624
    Rides:
    Vespa gts300
    perfect minors the man :bird:
     
    monty9120, Mar 21, 2008
    #89
  10. Jamie

    Jamie Active Member

    Messages:
    5,370
    Rides:
    xt660x, 200sx s14a
    i agree dave the exhuast does look/sound much better now.

    nothing like helping your engine run abit cooler aswell

    ;)
     
    Jamie, Mar 21, 2008
    #90
  11. lol

    lol New Member

    Messages:
    964
    yh minor u r a clever man u no your stuff how old where u when u first started to fix scooters and dave love the sound of the bike it look pretty fast when it reved to the biting point need to get a vid of it going along
     
    lol, Mar 21, 2008
    #91
  12. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

    Messages:
    14,276
    Rides:
    et2 monster
    been playing with engines for about 20 years.. had a smart dad and alot of shit cars when i was real young so learnt a fair bit, then started with bikes an it just went from there... havent really been playing with scoots all that long tbh

    but ye enough spam, dave, try grqabbin another one and loose 5% each time. time yourself along the same peice of road and figure what the perfect length is. old fassioned 2t pipes were exactly that, peices of pipe cut down til performance was at peak. there will be a magic length that works for your engine setup perfectly. rough workings out gave the figures i gave you but have a play. when you weld the baffel tube in try an point the exit of the pipe down as much as possible. less wind resistance forcing gas back in at high speeds that way
     
    MiNoR cOnFuSiOn, Mar 22, 2008
    #92
  13. capri dave

    capri dave Active Member

    Messages:
    5,076
    cheers minor... some valuable info there buddy ;)
     
    capri dave, Mar 22, 2008
    #93
  14. shiny red

    shiny red New Member

    Messages:
    1,224
    this thread just gets better and better :punk:
     
    shiny red, Mar 22, 2008
    #94
  15. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

    Messages:
    14,276
    Rides:
    et2 monster
    if more pople have a go at things ill let off more info.. cant answer q's that iant asked..
     
    MiNoR cOnFuSiOn, Mar 22, 2008
    #95
  16. nrgmc3

    nrgmc3 New Member

    Messages:
    111
    my dad told me about that once in the 70s when they raced grass track they would build an exhaust like 4 foot long cut an inch of after a lap of a track until they went to far then welded an inch on clever stuff
     
    nrgmc3, Mar 22, 2008
    #96
  17. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

    Messages:
    14,276
    Rides:
    et2 monster
    good thing is people turned these experiments into formula's we can all bash out on a calculator.. and with the 60's 70's and 80's works teams constantly pushing the boat out anything you can try has been done so its a case of reading up and applying calculations. 2t tuning is pritty simple compaired to the early 60';s where they thought max primary compression was the way forward, the japs soon figured how well a modularly constructed pipe of differing cone length/diameter can work with a 2t engine.
     
    MiNoR cOnFuSiOn, Mar 22, 2008
    #97
  18. nrgmc3

    nrgmc3 New Member

    Messages:
    111
    agreed. minor i no youve heard this a million times and probably wont want to no but that typhoon ive just bought would you say 4 gram rollers are to light for it its got the tkr pipe on it it seems really revvy and takes forever to get to 45 its a w reg typhoon x think there 8.5 from standard cheers mate oh and the previous owner said he upjetted it to a 70-80 jet he couldnt remember the exact size is this to high for just an exhaust?thanks alot if you can help mate
     
    nrgmc3, Mar 22, 2008
    #98
  19. capri dave

    capri dave Active Member

    Messages:
    5,076
    some czech geezer cant recall his name now, who was head tuning man at MZ of all companys... was the god father of 2 stroke expansion chamber development ;)

    But minor wasnt wrong...because the japs poached him from MZ and he took with him all his expansion chamber secrets, which the japs used to conquer
    the 2 stroke world :nerd:

    little bit of 2 stroke history for you there :nerd:
     
    capri dave, Mar 22, 2008
    #99
  20. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

    Messages:
    14,276
    Rides:
    et2 monster
    somones been reading LOL
    didnt actually know the first chambers were mz tho LOL first thing was an expantion box wich first exploited the resonant wave.. but ye, were all learning day by day ;)
     
    MiNoR cOnFuSiOn, Mar 22, 2008
    #100
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