ST 90'S

Discussion in 'CT90, CT110, ST70, ST90 Discussion' started by farm dog, May 5, 2019.

  1. farm dog

    farm dog Member

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    Hi does anybody know length of speedo cable ? The one I got from flyboy is 34" .
     
  2. b52bombardier1

    b52bombardier1 Well-Known Member

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    I will try to remember measuring one for you later today.

    Rick
     
  3. farm dog

    farm dog Member

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    Thank you . I was starting to feel like Tonto ,when he goes to town .
     
  4. b52bombardier1

    b52bombardier1 Well-Known Member

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    I'm certainly no Kemosabe, but it looks like about 28 inches, crudely measured. I did not take the headlight bucket apart to accurately measure it but I did account for the length hidden inside as best I could.

    Happy to help,

    Rick
     
  5. farm dog

    farm dog Member

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    Thanks again
     
  6. farm dog

    farm dog Member

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    OK cables from Flyboy throttle would work / brake would work .but the speedo is to long . Buy at your own risk.
     
  7. farm dog

    farm dog Member

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    Well I got started on 1 . Looking at the wiring , seems no power to the coil . Checked the off / run switch power on blk no go on blk / w . Does this sound like a bad switch , or am I going about it wrong ?
     
  8. farm dog

    farm dog Member

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    Update messed with the switch some more , got a green light there . now on to points then coil .
     
  9. b52bombardier1

    b52bombardier1 Well-Known Member

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    Do you have six volts on the flat points spring?

    Rick
     
  10. farm dog

    farm dog Member

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    HI No I don't get a reading at all . Base plate to head continuity .
     
  11. b52bombardier1

    b52bombardier1 Well-Known Member

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    With the key on, run-stop to run and a good battery you should have six volts on the flat points spring for most of the way around for the flywheel. Disconnect the points wire and recheck for six volts.

    Rick
     
  12. farm dog

    farm dog Member

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    6.2 on battery , still nothing on conn. from coil . Checked it today , yesterday was the normal Monterey Bay June gloom drizzle all day . Coil ? all wires are connected , lifted up in case of short .
     
  13. farm dog

    farm dog Member

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    Can't find what's wrong with 1st bike , is there a easy way to check coil without pulling motor ? Good news 2nd bike squirted a little gas in carb and got a fire . Have not tried much further , want to clean tank , new fuel lines & clean carb . Waiting for gasket set to clean oil spinner . Frame has been bent in around battery box/shock mount . Best way to push back out ? Box will come out with a little force .
     

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  14. b52bombardier1

    b52bombardier1 Well-Known Member

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    There are ohms checks for the coil but I have to say, they rarely fail. However, I have needed to clip back a quarter inch of spark plug wire at the plug cap and reattach - or use a plug wire rebuild kit from Dr ATV. Plug cap resistors also fail open . . . no spark is possible. Find out if you have six volts on the flat points spring. If not, figure out why. Back track along the points wire to find where you pick up six volts again. Fix that connection to get six volts to the flat points spring.

    Rick
     
  15. farm dog

    farm dog Member

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    Thanks no volts at spring or wire that feeds points . Power to kill switch & out .
     
  16. b52bombardier1

    b52bombardier1 Well-Known Member

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    Sounds like a broken points wire or connector needs to fixed. That wire is not well protected on an ST90.

    Rick
     
  17. getalab

    getalab New Member

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    @farm dog, you said the flyboy brake cable would work, but are you happy with it? He seems to have the only grey cable for the ST, but I don’t want to buy junk. My broken cable looks to be 41” sheath, 47” overall.
     
  18. farm dog

    farm dog Member

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    Hi I sent them all back and bought them from Dr ATV
     

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