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General Category => General Discussion => Topic started by: yackee on August 29, 2025, 05:45:50 PM

Title: Aux/fog lights on tonti
Post by: yackee on August 29, 2025, 05:45:50 PM
Moto, on this board, very kindly gave me a pair of nice LED auxiliary/fog lights for my T3. He has similar lights mounted on his T3, under the headlight with a clever homemade bracket.

I was hoping that others on the board might be able to share their strategies for mounting aux lights on their Tonti-frame bikes so that I can think through the possibilities. I have the "civilian" crash bars, but they don't seem adequate, either because of angle/height that the lights would be mounted at, or because they would be close to the exhaust port, which I don't want to obstruct. And I have the "tall" police-style windscreen on, as sold my mgcycle. my turn signals are mounted on a bar, also sold by mgcycle, on the bottom fork cross-brace.

Thoughts appreciated. And a shout out to Moto for his generosity and deep experience with these old bikes.
Title: Re: Aux/fog lights on tonti
Post by: StuCorpe on August 29, 2025, 06:50:19 PM
I used a pair of clamps from Harpers that they use to mound their fairing.  A long threaded rod filled up with stainless steel nuts to make it larger diameter (probably not necessary).  It looks like this.
(https://i.ibb.co/Yv07bb6/moto-guzzi-april-2010-001.jpg) (https://ibb.co/Yv07bb6)
Title: Re: Aux/fog lights on tonti
Post by: guzzisteve on August 29, 2025, 07:49:49 PM
On the bottom triple tree in front is where the brake fitting for front brake is, this is perfect place to mount bracket w/brake piece on top.
Title: Re: Aux/fog lights on tonti
Post by: kingoffleece on August 30, 2025, 08:18:04 AM
I'd be concerned that lights mounted too close to the turn indicators.  Could wash out the signal to approaching drivers.
Title: Re: Aux/fog lights on tonti
Post by: StuCorpe on August 30, 2025, 10:25:44 AM
King of Fleece- Doesn't seem to.  I have them connected like the aux driving lights on autos are supposed to be.  They are only on while driving on high beam headlight, whenever I go to low beam they go off.  That way no one coming toward me is not blinded like so many of todays super bright LED headlights do.
Title: Re: Aux/fog lights on tonti
Post by: Kiwi_Roy on August 30, 2025, 10:56:21 PM
I used a pair of clamps from Harpers that they use to mound their fairing.  A long threaded rod filled up with stainless steel nuts to make it larger diameter (probably not necessary).  It looks like this.
(https://i.ibb.co/Yv07bb6/moto-guzzi-april-2010-001.jpg) (https://ibb.co/Yv07bb6)

I like that look but I would have used a different spacer rather than the nuts.
When I put spots on my V7III Special I found that the factory had drilled and tapped holes under the bottom triple tree so I simply carved out a 3mm Aluminium plate for the two spots and a pair of fiaam freeway blaster horns.
I wired the spots thru a pair of 2 Amp reed switches inside the headlight bucket a small magnet on the outside of the plastic bucket closes the reeds. If I don't want the lights on I just move the magnet further away.
I used a pair of diodes one from High beam one from Low beam so the spots are on Low or High.
High beam ----->|----/------Spots
Low beam  ----->|---/
Title: Re: Aux/fog lights on tonti
Post by: Perazzimx14 on August 31, 2025, 07:19:43 AM
There are 100's f different light mounts n Amazon for short money. Peruse page after page of them until you find something you like. While looking also look for a LED replacement bulb for the headlight.

Here is a wiring diagram should you want use a relay with a keyed power source as a trigger.


(https://i.ibb.co/MyB5w95H/Screenshot-2025-08-31-081726.png) (https://ibb.co/MyB5w95H)
Title: Re: Aux/fog lights on tonti
Post by: StuCorpe on August 31, 2025, 09:46:10 AM
Kiwi Roy - I like the idea of something larger than the nuts.  But I used what was available and free.  I happen to have a lot of stainless steel (mostly 3/8" and 1/4") hardware from working with television transmission line so what was on hand and free is what got used.  I used One relay energized off the High beam light to turn on the aux lights.  Here again used a relay that I had on hand and was free.