2016 TV Clutch sensor thread is 1/8" bsp - MVAgusta.net
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post #1 of 17 (permalink) Old 12-07-2018, 12:36 AM Thread Starter
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2016 TV Clutch sensor thread is 1/8" bsp

I was surprised to discover that the thread on the hydraulic clutch sensor switch wasn't M10x1.0. It is 1/8 bsp. I ran a 1/8" bsp die over an M10x1.0 switch and it screwed in and sealed fine using a bonded washer.

1/8"bsp switches seem to be expensive but I see cheap car brake light switches on eBay for US cars. These are 1/8" NPT which is a tapered 28 tpi thread vs 1/8" bsp which is parallel 27tpi. I haven't tried one but they will probably work fine as long as they are not over-tightened.
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Last edited by silentservice703; 12-07-2018 at 06:09 AM. Reason: Clarification
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post #2 of 17 (permalink) Old 12-07-2018, 10:23 AM
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I found this switch https://www.merlinmotorsport.co.uk/p...-51650-bps-1-m earlier this year.
However, the thread does not match, and I did not know the OEM pitch. So I reinstalled the original switch.

The switch on my Turismo was not leaking; failure mode: always open circuit.
Funny thing the OEM switch has worked as normal since reinstalling it earlier this year.

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post #3 of 17 (permalink) Old 12-07-2018, 11:52 AM
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Quote:
Originally Posted by Teeps View Post
The switch on my Turismo was not leaking; failure mode: always open circuit.
Funny thing the OEM switch has worked as normal since reinstalling it earlier this year.
You probably removed the air bubble that was preventing function!?!
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post #4 of 17 (permalink) Old 12-07-2018, 12:06 PM
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Quote:
Originally Posted by esq'z me View Post
You probably removed the air bubble that was preventing function!?!
Agreed, that was my thought too.
Glad I didn't order the ($130usd) switch from MV.

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post #5 of 17 (permalink) Old 12-18-2018, 10:52 AM
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On the subject of the hydraulic clutch sensor, I have scoured the TVL workshop manual from end to end and I fail to see any reference or picture as to exactly where this sensor is mounted. Before I start disassembling the obvious locations, could someone please give me either a clue or starting point?
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post #6 of 17 (permalink) Old 12-18-2018, 11:41 AM
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Based on the following picture, I would say the actual clutch switch is installed at the slave cylinder on the left had engine casing. Follow the shown wires to the switch.

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post #7 of 17 (permalink) Old 12-18-2018, 12:45 PM
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Quote:
Originally Posted by Sebraun View Post
... I fail to see any reference or picture as to exactly where this sensor is mounted. Before I start disassembling the obvious locations, could someone please give me either a clue or starting point?
Switch is screwed on the RH side of the clutch receiver.
Take out the 3 small screws that from the quick-shifter cover.

then the 3 that hold the chain cover.
Undo the gearbox link to the QS from the gearbox shaft... On top easy.

Remove cover
The big brass wart on the top left is the switch.


Unless you're lucky reaching the end of the wires is iffy at best.

Tried that on the roadside. No good.


Either lift the tank = more wrenching
or unsolder the wires.
No proper tools, in my case: snip.
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post #8 of 17 (permalink) Old 12-18-2018, 01:57 PM
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I went through this on my TV earlier this year.
Takes longer to type this than access the sensor.

I unsoldered the wires from the sensor to remove it. Much easier than removing or lifting the fuel tank.

Note: the circuit is not polarized.

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post #9 of 17 (permalink) Old 12-18-2018, 01:58 PM
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Quote:
Originally Posted by Sebraun View Post
On the subject of the hydraulic clutch sensor, I have scoured the TVL workshop manual from end to end and I fail to see any reference or picture as to exactly where this sensor is mounted. Before I start disassembling the obvious locations, could someone please give me either a clue or starting point?
What is wrong with your bike that you need to access the clutch sensor?

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post #10 of 17 (permalink) Old 12-18-2018, 04:55 PM
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It's just a fluid pressure open/close switch....just like a brake light switch on some vehicles, or an oil pressure sensor/switch

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