Ad Widget



No announcement yet.

is my speedo off?

  • Filter
  • Time
  • Show
Clear All
new posts

  • is my speedo off?

    was cruising down michigans, i75 at the speed of traffic. I look down at my speedo and im indicated at 90mph. i'm in the far right lane and i get passed on the left. do you guys think this is a case of some aggressive drivers, or is my speedo way off?

  • #2
    Way off, what's your gearing?
    "I'm sorry, I didn't mean to upset you when I called you stupid. I thought you already knew..."
    spammer police
    USAF veteran
    If your a veteran, join the KR veterans group


    • #3
      Speedo just being off, especially if you no longer have OEM sprockets. +-10% is normal...
      1998 Katana 750
      1992 Katana 1100
      2006 Ninja 250

      2006 Katana 600 RIP - 130k miles


      • #4
        Originally posted by 92xjunker View Post
        Way off, what's your gearing?
        stock gearing. guess i will compare speeds with an app on my phone in the morning. why would my speedo be off by so much?


        • #5
          My Kat and my VFR were off slightly when compared to the speed on the GPS, they were low on both bikes.


          • #6
            Pre kat speedo is cable driven off the front wheel. It's naturally about 10% off, showing you going faster than you are. That's with the stock 110 front tire.

            Now days everyone uses the 120//70. It's not as large, so you get an even more out of whack reading off further.

            So if your speedo is reading 90... and it's off at least 10%, then your actual speed was closer to 80... or less.

            93 750 Kat

            Modified Swingarm, 5.5 GSXR Rear with 180/55 and 520 Chain, 750 to 600 Tail conversion, more to come. Long Term Project build thread

            "I've done this a thousand times before. What could possibly go wron.... Ooops!"


            • #7
              Mine is off too by 10% exactly. But I have the Post Kat and changed the rear tire for a wider one. Speedo says 100KM/H and I'm actually doing 90KM/H