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

Help Normally open kill tether hookup?

Discussion in 'Kawasaki 250cc In-line 4's' started by DamnitLaverty, Jul 22, 2021.

  1. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

    Messages:
    319
    Likes Received:
    238
    Trophy Points:
    248
    Joined:
    Jun 6, 2016
    Gender:
    Male
    Occupation:
    Computery
    Location:
    Seattle
    My Bike:
    '00 Monster 750, '91 ZXR250c
    LSR rules require a tether. I can’t find a Normally Closed switch on speedy delivery, and the one I have is Normally Open. Not sure what on the CDi I could short to ground, so I’m considering just wiring it into the kickstand wiring- looks like that switch closes when the stands down.
    Anyone run a switch like this, or have a better suggestion of something that will kill the bike if I run it to ground without burning the bike down?
     
  2. Gen

    Gen Well-Known Member

    Messages:
    324
    Likes Received:
    330
    Trophy Points:
    273
    Joined:
    Aug 16, 2014
    Gender:
    Male
    Location:
    50 K's from South Australia, in NSW
    My Bike:
    blown CBR250r
    I wired everything thru a relay, & fed the power to that via a tether, cut the power to the relay, everything dies.
     
  3. jmw76

    jmw76 Well-Known Member

    Messages:
    1,151
    Likes Received:
    585
    Trophy Points:
    498
    Joined:
    Mar 12, 2017
    Gender:
    Male
    Location:
    Melbourne, Australia
    My Bike:
    Honda cbr250rr mc22 road + 1 track, Honda RC 162 tribute bike, Honda Spada Vt250, Honda CBR900RR
  4. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

    Messages:
    319
    Likes Received:
    238
    Trophy Points:
    248
    Joined:
    Jun 6, 2016
    Gender:
    Male
    Occupation:
    Computery
    Location:
    Seattle
    My Bike:
    '00 Monster 750, '91 ZXR250c
    So I validated- an NC switch would do it. This NO switch operates the opposite of the kickstand- kickstand up the switch has continuity, key in the kill does not.
    Guess I better find a speedy delivery NC switch.
     
  5. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

    Messages:
    3,979
    Likes Received:
    2,207
    Trophy Points:
    923
    Joined:
    Nov 19, 2013
    Gender:
    Male
    Occupation:
    Gardener
    Location:
    Tasmania
    Home Page:
    My Bike:
    Spada, VT250F & ZX2R
    I use a 30A fuse holder (& Fuse) wired into the earth circuit. Drill a hole through the 30A fuse and connect a tether to it. Works well enough for it to pass scrutineering.

    https://www.ebay.com.au/itm/382297979049

    30A cutout.jpg
     
    • Like Like x 2
  6. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

    Messages:
    319
    Likes Received:
    238
    Trophy Points:
    248
    Joined:
    Jun 6, 2016
    Gender:
    Male
    Occupation:
    Computery
    Location:
    Seattle
    My Bike:
    '00 Monster 750, '91 ZXR250c
    you sir, are a genius- simple, cheap, normally closed, low friction.
     
    • Agree Agree x 1
  7. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

    Messages:
    319
    Likes Received:
    238
    Trophy Points:
    248
    Joined:
    Jun 6, 2016
    Gender:
    Male
    Occupation:
    Computery
    Location:
    Seattle
    My Bike:
    '00 Monster 750, '91 ZXR250c
    How are you attaching it to the bike? I can't find a good place to hook it up, and I spent all tonight trying to make a bracket for it that didn't require using the wiring as the restraint mechanism!
     
  8. Gen

    Gen Well-Known Member

    Messages:
    324
    Likes Received:
    330
    Trophy Points:
    273
    Joined:
    Aug 16, 2014
    Gender:
    Male
    Location:
    50 K's from South Australia, in NSW
    My Bike:
    blown CBR250r
    one way Damnit
    killittdamitt.jpg
     
    • Like Like x 2
  9. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

    Messages:
    319
    Likes Received:
    238
    Trophy Points:
    248
    Joined:
    Jun 6, 2016
    Gender:
    Male
    Occupation:
    Computery
    Location:
    Seattle
    My Bike:
    '00 Monster 750, '91 ZXR250c
    I don’t have a way to put a screw thru it! Ugh.
     
  10. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

    Messages:
    3,979
    Likes Received:
    2,207
    Trophy Points:
    923
    Joined:
    Nov 19, 2013
    Gender:
    Male
    Occupation:
    Gardener
    Location:
    Tasmania
    Home Page:
    My Bike:
    Spada, VT250F & ZX2R

    I made a bracket to sit the fuse holder in. I attached the bracket to the top triple. The bracket needs to 'hold' the bottom of the fuse holder and also clamp around the body. When the scrutineering folks check your lanyard is working they will get you to put it on and pull away from the bike. As long as the fuse pulls out of the holder, you'll be sweet. They might ask you to run the bike to check it properly.

    ZXR Fuse Bracket.jpg

    ZXR Fuse Holder.jpg

    I used this kind of fuse holder...

    Fuse.jpg
     
    • Like Like x 1
    Last edited: Jul 28, 2021
  11. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

    Messages:
    319
    Likes Received:
    238
    Trophy Points:
    248
    Joined:
    Jun 6, 2016
    Gender:
    Male
    Occupation:
    Computery
    Location:
    Seattle
    My Bike:
    '00 Monster 750, '91 ZXR250c
    Damnit, I was building a bracket like that and it failed in construction- but I was trying to make it work without drilling holes in the bike so I needed it to bend too many ways and it failed. We were on the same page tho!
     
  12. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

    Messages:
    3,979
    Likes Received:
    2,207
    Trophy Points:
    923
    Joined:
    Nov 19, 2013
    Gender:
    Male
    Occupation:
    Gardener
    Location:
    Tasmania
    Home Page:
    My Bike:
    Spada, VT250F & ZX2R
    "failed in construction" will probably be my epitaph!
     
  13. DamnitLaverty

    DamnitLaverty Doing things the hard way since '78!

    Messages:
    319
    Likes Received:
    238
    Trophy Points:
    248
    Joined:
    Jun 6, 2016
    Gender:
    Male
    Occupation:
    Computery
    Location:
    Seattle
    My Bike:
    '00 Monster 750, '91 ZXR250c
    Just an update- I ended up just buying an NC kill switch. Wired it through the ground side like we talked about. Got out to the event, got the bike running, pulled the switch... and it kept running. Like ass, but it kept running.

    I ended up having to wire through the red wire at the kill switch instead- interrupting that killed the engine as expected.
     
    • Bummer Bummer x 1

Share This Page