analog speedometer accuracy quesion

Discussion in 'Electrical' started by dotcom, Jan 26, 2015.

  1. dotcom

    dotcom Member

  2. bigbikeseat

    bigbikeseat Member

    What size are your wheels. The speedometer wants 26" or 27" wheels. Yours must be smaller.
  3. dotcom

    dotcom Member

    twenty six
  4. butre

    butre Well-Known Member

    those things are consistently 30% high. nothing to do about it but print a new faceplate for it
  5. HeadSmess

    HeadSmess Well-Known Member

    my 1960's speedwell one works ok on 20" wheels...

    theyre all wheel diameter dependent. a 27" will just get faster and fasteer with smaller wheels...a 20" model will just get slower and slower with larger wheels...

    reprinting the face plate is a good idea though ;) even laminate the little cutout so its weatherproof...
  6. FrenchFRI3S

    FrenchFRI3S New Member

    Tried the same one with mine on these... almost 20 mph over, tried a 26" on the front and got about 10 over estimated. I doubt these we're intentionally supposed to be accurate. I do however like the idea of the fix you guys mentioned about replacing the measurements with another print out. I'm waiting on a mag, replaced the factory cdi and mag but, the mag got moister due to the well hidden pinched gasket i had issues with. I'm Looking Forward to next week though. Should have it all back and ready to hit the road. I switched frames because this frame warped due to it being aluminum. I did put in a set of rear brakes after these pictures we're taken.

    10363594_752033378225059_3752414912288070655_n.jpg 10603275_752028451558885_8115699446773361518_n.jpg