katana speedo drive from a gsxr front wheel

[GSX1100dreamn]

picture alone.

[coombehouse]

7 hours ago, GSX1100dreamn said:

picture alone.

That's the same drive I mentioned earlier. It's from a vfr400 or rc36 vfr750. I've just bought one from Eblag for £20 to see what it's about. 

[alboo]

wow this has got you all thinking and i thank you 

i bought the front end without checking  it was a bargain

i have to keep control of costs  but i do have an elec koso i think because of my limited exsperiance i think

dezzas solution will work for now

 

I can not thank all of you for your responces 

[johnr]

On 3/14/2023 at 7:54 AM, Gixer1460 said:

Front sprocket won't work as a) it continually changes speed as you change gears and b) its geared lower than road wheel so would always read low anyway!

BUT a speedo drive on the rear axle would work as (unless spinning) the wheel is always at road speed - can't be anything but!

let me read that again.........
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no....... let me try again.........
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 nope, so youre saying........
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erm, so let me.........
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 i mean......
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what?

[Gixer1460]

What are you having problems understanding, as I've already admitted to fucking up with the first paragraph? The second is a simple concept or can't you grasp that either?

[Suzukian]

If you had a chip in there calculating the speed of the front sprocket and comparing it with the speed of the rear wheel, then a unit on the front sprocket would be able to calculate the speed.  If you think you are going to take and mount something on the front sprocket and that will automatically match the rear wheel, with no information or means of calculating such information, you have no knowledge of electronic circuitry, chipss, etc..  How could the front sprocket know every bike made and their ratios.  The concept is wrong from the outset.  Mounting the drive on the rear wheel would be the best way to go in this case, or getting a front rim that has a speedo drive.

 

Gixer1460    That cock in your mouth is making you mean. 

 

 

 

[bluedog59]

Aftermarket electronic speedos have a section in the menu for inputting the wheel circumference to account for different wheel sizes. 

A. Measure the rolling circumference of the tyre.

B. Work out the final drive sprocket ratio ( normally around 3 to 1 ).

Dividing A by B will give you distance traveled per front sprocket revolution and an effective wheel circumference to input into the menu.

Suzukian. May I suggest you get off your "high horse", the altitude sickness is giving you brain fade.

[Suzukian]

I think I got altitude sickness by flying at 15K feet with no oxygen.  If people are going to be nasty, then have the thick skin to take the replies.  I shall struggle to maintain a proper altitude, but will always chop people down a  notch that are being undeservedly disrespectful.  Not a high horse.  Just who I am.

 

I do also agree about the electronic speedos, but the GPS speedos don't require any of that, and come inn all shapes and sizes, from super futuristic, to nostalgic/vintage. ;).

[alboo]

Thanks every one foe your input its much apreciated .I am using a koso i have had for some time the katana speedo and revcounter have been removed and the small oblonge kaso unit fits inside we  will see how it works

[coombehouse]

2 hours ago, alboo said:

Thanks every one foe your input its much apreciated .I am using a koso i have had for some time the katana speedo and revcounter have been removed and the small oblonge kaso unit fits inside we  will see how it works

Can we see a picture please