89 fj speedo reads way high.

[FJmonkey]

Just sent in my speedo to Foreign Speedo in San Diego.  In our discussion, he said they usually set the speedo to Yamaha's stock setting, which i am understanding by posts is way off. I then asked him if they could set it to be exact and he said yes.  There is a way to set it by measuring out 52 ft. 9 1/2 in.  and counting  the number of revolutions the cable makes, both full and the last part revolution. They then set the speedo to the number given to them.  I am in the process of doing that now and he told me the speedo would be accurate. Just thought I would post this for you all.

Do these guys repair speedos as well? I lost the name of the place in San Diego that repairs them.

[Arnie]

I thought that 52ft 9.5in was a strange number, until I realized that it was 1/100 of a mile. :-)
So, they spin the cable at that rpm and set 100mph on the dial.  Great work.

Arnie

[Pat Conlon]

Do these guys repair speedos as well? I lost the name of the place in San Diego that repairs them.

Mark, yea, it's the same place. I saved the info over in the Files section: http://www.fjowners.com/index.php?topic=5718.0

[bigbore2]

Arnie- you are  one clever guy.

[bigbore2]

Got my speedometer back from Foriegn Speedo in San Diego and this is the scoop.  Odometer and speedometer are fed by the same cable,as you know.  So not only is one's speedo off but the odometer as well.  Both are set by the # of speedometer cable turns. Yamaha's stock number is 2240.  When I measured the # of turns, according to the 59 ft  9 1/2 in. they gave me, I came up with 2380. That is a difference of 5.88 %.  So I had them adjust my odometer as well- went from 36,318 mi. to 34,182 mi. All for a cost of $80.