Tachometer died, where is the sensor? - SV650.org

21-01-08, 10:43 PM

Just restored my '99 to stock carb set up, from the desnorkeled/jetted/shimmed. Anyway, slapped it all together and the tach is not functioning. Everything else running fine. I assume I disconnected a wire or bumped a sensor connection while taking the carbs out, anyone have any input? Was working t!ts up 'til just now.

Cheers -D#

Oh yeah, also put in new plugs at the same time, the dual sparky type. Don't tell me I mashed the front plug connector? They related?

21-01-08, 10:48 PM

Yorkie, Northwind where are you, I know you got answers!

Sid Squid · 21-01-08, 11:02 PM

There's no sensor as such - the tach is driven from the ignition system, check you've not disturbed any of the wiring.
At the tach there are three connections - hot and cold, and one out of the ignition system.

22-01-08, 07:06 AM

Cheers Sid, will be in there tonight troubleshooting. -D

22-01-08, 07:34 AM

As far as I can tell the tach will use the positive and negative feed of the clocks along with a 3rd line from the first ignition coil to determine the firing rate. I'm currently trying to re-wire a stock tacho back into the race loom on my bike.

On a side note does anybody have experience of managing to cut down the standard clocks? The interior has both the tacho and speedo and idiot lighgts on a single large circuit board. Ideally I'd like to drop all but the tacho.

21-01-08, 10:43 PM	#1
ELR4ever Guest Posts: n/a	Tachometer died, where is the sensor? Just restored my '99 to stock carb set up, from the desnorkeled/jetted/shimmed. Anyway, slapped it all together and the tach is not functioning. Everything else running fine. I assume I disconnected a wire or bumped a sensor connection while taking the carbs out, anyone have any input? Was working t!ts up 'til just now. Cheers -D# Oh yeah, also put in new plugs at the same time, the dual sparky type. Don't tell me I mashed the front plug connector? They related? Last edited by ELR4ever; 21-01-08 at 10:46 PM.

21-01-08, 10:48 PM	#2
ELR4ever Guest Posts: n/a	Re: Tachometer died, where is the sensor? Yorkie, Northwind where are you, I know you got answers!

21-01-08, 11:02 PM	#3
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: Tachometer died, where is the sensor? There's no sensor as such - the tach is driven from the ignition system, check you've not disturbed any of the wiring. At the tach there are three connections - hot and cold, and one out of the ignition system. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

22-01-08, 07:06 AM	#4
ELR4ever Guest Posts: n/a	Re: Tachometer died, where is the sensor? Cheers Sid, will be in there tonight troubleshooting. -D

22-01-08, 07:34 AM	#5
tranx Guest Posts: n/a	Re: Tachometer died, where is the sensor? As far as I can tell the tach will use the positive and negative feed of the clocks along with a 3rd line from the first ignition coil to determine the firing rate. I'm currently trying to re-wire a stock tacho back into the race loom on my bike. On a side note does anybody have experience of managing to cut down the standard clocks? The interior has both the tacho and speedo and idiot lighgts on a single large circuit board. Ideally I'd like to drop all but the tacho.

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