1972 CT-90 rebuild

Discussion in 'Battle Scooters' started by sailah, Aug 24, 2010.

  1. robertjludwigsr

    robertjludwigsr Adventurer

    Joined:
    Dec 13, 2009
    Oddometer:
    89
    I did my 74 k5 a year ago powder coating the whole deal came out great. If you have not sugggest you replace the oem rectifier with a radio shack full wave rectifier better charging and your battery will hold a charge longer. Cost less than 5 bucks. get rid of the lead acid battery and replace with a Werker 6vlt 5amp hr glass matt battery. No more acid on the bike eating the paint and everything else up. Its available from batteries plus on line. These are great fun bikes on road and off top end 50 to 55mph and in the low range very capable of handling the steeps.
    #21
  2. Woodsrat

    Woodsrat Gone ridin'

    Joined:
    Apr 27, 2006
    Oddometer:
    1,273
    So how were the forks on your rebuild? I've yet to see a set that didn't have bad tubes. A set I'm rebuilding right now have the chrome worn off on the sides in roughly an oval shape, probably as a result of misalignment at the factory during assembly. Dunno if they're going to be oil tight or not--we'll see. New ones are $250+ per pair.:eek1
    #22
  3. Balootraveler

    Balootraveler Been here awhile

    Joined:
    May 3, 2009
    Oddometer:
    362
    Location:
    mississippi of the west.
    Ok I too have a 72 ct90, all the parts are present but in rough shape. I am working on the Carb right now and would like to know what the brass vent tube? on the right side of the carb is for? I'll try and get a picture posted to help show it. I know where the fuel lines go and the drain, the other tube ??? Is it a vacuum port?
    #23
  4. hugemoth

    hugemoth Long timer

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    Sep 6, 2007
    Oddometer:
    3,081
    Location:
    In the TARDIS
    It's a vent for the float bowl. Should have a tiny hole in it. Don't plug it up or attach a hose to it.

    #24
  5. Balootraveler

    Balootraveler Been here awhile

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    May 3, 2009
    Oddometer:
    362
    Location:
    mississippi of the west.
    Cool I hoped that was it and I was not missing some impossible part. Thanks
    #25
  6. bdgoose

    bdgoose Adventurer

    Joined:
    Sep 15, 2010
    Oddometer:
    11
    Location:
    North County, San Diego, CA
    Hi, I have been browsing and I have run into other rust removel tricks, one simular to what I think your doing in this photo. Can you please explain what is happening in this photo, the process involved. please:huh
    #26
  7. bbishoppcm

    bbishoppcm It ain't a moped.

    Joined:
    May 19, 2010
    Oddometer:
    666
    Location:
    Bennington, NH
    What he is doing is essentially electrolysis; using a DC current (apparently, 12v in this case), the tank is connected to the positive lead (acting as an anode) and the negative lead is placed in the liquid filled tank as a cathode. The flow of electrons from the tank to the cathode actually slowly removes metal (and rust) from the inside of the tank, as it collects on the cathode. The liquid must be conductive, so there may be an additive of some sort. This is the same concept used to chrome metal parts.
    #27
  8. joenuclear

    joenuclear Planning.....

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    Mar 16, 2007
    Oddometer:
    6,541
    Location:
    Fort Smith, Arkansas
    ?
    #28
  9. heliyardsale

    heliyardsale Always looking for Dirt!

    Joined:
    Feb 25, 2009
    Oddometer:
    420
    Location:
    CNY.. Home of too many Liberials, yuck!
    Arm and Hammer washing soda and water is used.
    #29
  10. heliyardsale

    heliyardsale Always looking for Dirt!

    Joined:
    Feb 25, 2009
    Oddometer:
    420
    Location:
    CNY.. Home of too many Liberials, yuck!
    By chance do you have a part number for the RS full wave rectifier? I'd like to upgrade my 77'.
    Thanks.
    #30
  11. sailah

    sailah Lampin' it

    Joined:
    Aug 12, 2005
    Oddometer:
    5,824
    Location:
    Turning expensive metal into scrap
    blast from the past. I did sorta finish it, got it running then promptly put it in storage. Haven't seen it in awhile and probably won't with the projects I have going.
    #31
  12. ohiomatt

    ohiomatt Adventurer

    Joined:
    Jun 17, 2012
    Oddometer:
    44
    Location:
    Perrysville, OH
    Cool that you finished it. Had a CT110 growing up and wish I still owned it. Loved the dual range transmission.
    #32