Aftermarket Speedometer for 2000 SV650 (Y)

[gt alex]

Originally Posted by gt alex

Hi just replaced mine after the retifier failed killing everything including battery cdi headlight and tacho.
I bought a chinese one which seems good. heres a couple of things that may help.
Modern tachos often don't use coil signal, they use a pulses from the crank trigger. I ran a wire from the pulse in ata the cdi. also the standard speedo rotor has 4 magnets and worked well with the aftermarket speedo.
Hope this is helpful

Tring to post picture of the aftermaket speedo on my sv650

[R1ffR4ff]

Originally Posted by DonSteve

I too have a blown tacho (I think), it was a long time since this posting but can you remember how you diagnosed/fixed it?

On the Circuit board behind the clock on mine there were two Charred components e.g a Diode and a Resister close together.

I had an old 1n4004 diode


https://www.ebay.com/itm/10-PCS-1N40...8AAOSwPK1ZTq33

in my bits box and used that but you can use a modern equivalent.

Then also replace the Resistor which I think a 30 ohm will do the trick.

Remember the Diode is directional so MUST be soldered the correct way round so if there are any markings left on the Diode on the board take a Photo with your phone.The resistor isn't so it doesn't matter.

If you are lucky like I was these two components acted as a Fuse and blew saving the rest of the circuitry.

Once all done I had to fiddle around with the Tacho needle to set to right.

Tip:I used a kitchen fork to keep taking the Need off and putting it back on the Tacho with the engine running until I go close to the correct position.Once set and after a few miles the Tacho settled back to being ok

Note:The cause of the Tacho failure was,"Over-Voltage" caused by a failing Regulator/Rectifier.Before repairing the Tacho I replaced the failed one with an Updated Mosfet version as per this page I made,

https://cx500.000webhostapp.com/Mosf...sfetUniRR.html

[DonSteve]

That's great, thanks. I removed the clock and it was clear that a resistor (R1) was burned out, a friend is now working on it for me.
Thanks again.
Regards Steve

[R1ffR4ff]

Originally Posted by DonSteve

That's great, thanks. I removed the clock and it was clear that a resistor (R1) was burned out, a friend is now working on it for me.
Thanks again.
Regards Steve

Great. Keep us posted