I want a tachometer on my TW.
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Thread: I want a tachometer on my TW.

  1. #1
    Member ShaggyAnt's Avatar
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    I want a tachometer on my TW.

    What do you think? I don't see a tach threading the stickies. I'm sure someone must have done this on a TW before. I see a lot of cheap motorcycle tachs on eBay. Is there a recommended one?

  2. #2
    Senior Member Dryden-Tdub's Avatar
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    Quote Originally Posted by ShaggyAnt View Post
    What do you think? I don't see a tach threading the stickies. I'm sure someone must have done this on a TW before. I see a lot of cheap motorcycle tachs on eBay. Is there a recommended one?
    Here you go

    https://tw200forum.com/forum/technica...ach-tw200.html



    Tom
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    Senior Member NoHair McNair's Avatar
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    I got this off eBay for about $8. Using longer front brake master cylinder screws to mount it.

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    Senior Member Indiana's Avatar
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    Quote Originally Posted by NoHair McNair View Post
    I got this off eBay for about $8. Using longer front brake master cylinder screws to mount it.
    Do the mounting holes line up with the screws on the master cylinder cover? If so, I think I'm going to spend the $8! I have the hour meter only version of that and I like it a lot.
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    Senior Member ssgtrillium's Avatar
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    I don't want to know how fast that little motor is turning or I would never go over 30 mph.
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    Senior Member scotti158's Avatar
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    Shift when it won't go any faster in the gear your in. I do that all the way to 5th gear and try to grab 6th.
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    Senior Member Dryden-Tdub's Avatar
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    Quote Originally Posted by scotti158 View Post
    Shift when it won't go any faster in the gear your in. I do that all the way to 5th gear and try to grab 6th.
    Not sure if you are serious or not but that is essentially how I ride mine. On the road at least.


    Tom
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  9. #8
    Senior Member NoHair McNair's Avatar
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    Quote Originally Posted by Indiana View Post
    Do the mounting holes line up with the screws on the master cylinder cover? If so, I think I'm going to spend the $8! I have the hour meter only version of that and I like it a lot.
    I enlarged one of the holes and used a stainless steel allen head bolt to mount it. That worked well enough so I never bothered with the second bolt. I used a small piece of double sticky tape as well.

    There is a 4-stroke and 2-stroke version of the tach. On the 4-stroke version, the tach figures that, for every spark firing, the motor turns 2 revolutions. The 2-stroke version figures that every spark is one revolution. I have the 4-stroke version.

    However, I think the TW200 fires on every revolution even though it doesn't need to. It triggers off the sensor from the crank, which is every revolution. My tach reads 600rpm at idle and 3800 rpm or so at 55mph or so. (Never really checked it. )

    Does anyone here know if the TW200 ignition sends a spark out every revolution or has some way of knowing when it is on the compression stroke as compared to the exhaust stroke?
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  10. #9
    Senior Member ssgtrillium's Avatar
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    Yes it is a wasted spark system.

  11. #10
    Senior Member jbfla's Avatar
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    Quote Originally Posted by NoHair McNair View Post
    .... My tach reads 600rpm at idle and 3800 rpm or so at 55mph or so. (Never really checked it. )

    Does anyone here know if the TW200 ignition sends a spark out every revolution ...
    Yes, the spark plug fires every revolution...."wasted spark".

    You should check your tach... idle speed on the TW should be 1,300 ~ 1,500 rpm.

    I think your tach is for a "single spark" system. Some tachs have a switch to change from single spark to wasted spark.

    jb
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