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85 mph speed restriction in early '80's bikes?

  • Thread starter Thread starter robinjo
  • Start date Start date
My 1100 also has the 85mph speedo. I just figured that if I wanted to know approx speed after 85 all you had to to was run your bike to half of redline and devide by 2. Then half of that and so on. What you're after is speed per thousand Any hooo on a stock geared 1100E it works out to like 15.5 mph per 1000rpm. So 9000 rpm equals approx 139.5
1x15.5=15
2x15.5=31
3x15.5=46.5
4x15.5=62
5x15.5=77.5
6x15.5=93
7x15.5=108.5
8x15.5=124
9x15.5=139.5 MPH
Remember, these are all approx speeds while in 5th gear. But it gets you more than in theball park. I had my 1100 up to 8500 RPM or so and figured that to be about 130mph
 
Here in Canada, our bikes never came with that silliness, but our cars did. :-k
 
I once heard someone with an 85 mph speedo on a modified 1982 750 EZ

did a little over redline (9500 rpm) and calculated that every 1000 rpm in 5th gear was about worth 12 miles per hour.

Reliable calculation put the bike at around 128 mph. Heh heh.
 
I used to have a GS850GL. I took the speedo apart and pulled the little peg out. I could wrap it around to say I was going 15 mph 8)
 
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