The '93 - '96 1000F all came with a 17T front and a 42T rear sprockets.

 

How does the speedo get it's signal? Does it sense rpm's of the tranny output shaft?

I'll check my sprockets when i get a chance to pull the front cover off. Thanks for the help.
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BUY GRINDER

 

The speedo cable is driven off of a plastic nut that fits over the main front sprocket bolt. If you do a search under my name, there is a thread on how to replace the nut and what it looks like.

 

Um, the speedo drive is independant of the sproket size. It's driven off the same bolt, and spins that same regardless of the number of teeth on the sproket.
FWIW, myspeedometerreads about 10% fast, according to my GPS.

 

That doesn't sound right to me. If the speedo drive spins the same regardless of the number of teeth, then it's telling the speedo that the rear wheel is spinning at a certain speed based upon the stock gearing. When you change the gearing, then the rear wheel's rpm's are lower than with the stock gearing- just the speedo doesn't know this. Rick's dad's speedo is running closer to 20% fast than it is to 10%.

 

pacojoseph's right. If you change the gearing, the indicated speed on the speedometer will change. Yes, the relationship between the speedometer and the sprocket won't change, but the relationship between the transmission and the real wheel will change if you change sprocket ratios.

 

But the front sproket spins the same RPM's regardless of how fast the rear wheel spins.
So the speedometer will read the same regardless which sprocket you are running. Yes your actual speed will change in relation to your RPMsbut your displayed speed will remain the same. I was looking at the issue from the other side. In other words, no matter what sprocket you use, the displayed speed will always be the same.
Which on a stockCBR displayed is about 10% faster then actual speed.

 

Tell that to the cop who clocked me at 86 while my speedo read 105 with 17/46

 

I never drive over the speed limit...you guys are a bad influence on me.

My speedo shows 0 all the time now

 

We can actually figure this out without looking at the sprockets.

If someone posts their exact speedo reading on a stock bike - 6th gear @ 5000 rpm. The original poster posts their exact speedo reading (6th gear @ 5000 rpm).

Do some basic math - do +1,0; +1,-1; +1,-2 and compare to the Original posters indicated speed - done.

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