# rev counter - Stone 1100
**URL:** https://forum.motoguzziclub.co.uk/t/rev-counter-stone-1100/1009
**Category:** Big Block Tonti and Loop Frame models
**Created:** [10 December 2013 11:54 UTC](https://forum.motoguzziclub.co.uk/t/rev-counter-stone-1100/1009 "2013-12-10T11:54:17Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Exmembers](https://forum.motoguzziclub.co.uk/u/Exmembers)
#### Post date: [10 December 2013 11:54 UTC](https://forum.motoguzziclub.co.uk/t/rev-counter-stone-1100/1009/1 "2013-12-10T11:54:17Z")
how do I wire up a rev counter on a guzzi stone 1100 I have found some info but mostly American, I have purchased the rev counter (vega) it has a black and yellow wire which is the one I need? I think? any one fitted a rev counter to stone?
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### Author:  [@Exmembers](https://forum.motoguzziclub.co.uk/u/Exmembers)
#### Post date: [10 December 2013 18:27 UTC](https://forum.motoguzziclub.co.uk/t/rev-counter-stone-1100/1009/2 "2013-12-10T18:27:36Z")
I wouldn’t sware to it but I think there is a plug already wired up for a rev counter as they used to offer it as a factory accessory
Mick
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### Author:  [@Exmembers](https://forum.motoguzziclub.co.uk/u/Exmembers)
#### Post date: [10 December 2013 19:38 UTC](https://forum.motoguzziclub.co.uk/t/rev-counter-stone-1100/1009/3 "2013-12-10T19:38:59Z")
Normally electronic rev counters have 3 connections.
A positive feed from the ignition.
An earth connection.
A trigger lead which connects to the negative side of the ignition coil.gtmdriver2013-12-10 19:39:20
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### Author:  [@Exmembers](https://forum.motoguzziclub.co.uk/u/Exmembers)
#### Post date: [11 December 2013 15:27 UTC](https://forum.motoguzziclub.co.uk/t/rev-counter-stone-1100/1009/4 "2013-12-11T15:27:02Z")
thanks will look in back of speedo housing
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### Author:  [@Exmembers](https://forum.motoguzziclub.co.uk/u/Exmembers)
#### Post date: [11 December 2013 15:28 UTC](https://forum.motoguzziclub.co.uk/t/rev-counter-stone-1100/1009/5 "2013-12-11T15:28:33Z")
would that be the black/yellow wire
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### Author:  [@Exmembers](https://forum.motoguzziclub.co.uk/u/Exmembers)
#### Post date: [12 December 2013 09:24 UTC](https://forum.motoguzziclub.co.uk/t/rev-counter-stone-1100/1009/6 "2013-12-12T09:24:22Z")
On my Cali III the positive wire is red, the earth is black and the trigger wire is yellow/black.