Melotti - which resistor ? - MVAgusta.net
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post #1 of 17 (permalink) Old 05-21-2014, 05:09 PM Thread Starter
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Melotti - which resistor ?

Gents I need Your help again!
I bought a tail tidy from Alex at GP Racing with the LED turn signals.
Reason is that I broke the CF rear fender and since this is the second of these brittle pieces at my 01 F4, I'm just sick of spending fortunes on it anymore.
Now I got from Alex the advise to use 10 Watt resistors.
So I went to Radioshack and they looked at me and asked what resistance do I need.
He gave me 1 Ohm, 10 Ohm and 50 Ohm 10 Watt resistors.
Well to make the story short.
None of them work !
The light goes on for a few seconds and than off, the front signal stays on.
So does it without a resistor.
Now my question is, what kind of resistor do I need ?
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post #2 of 17 (permalink) Old 05-21-2014, 09:55 PM
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I used to run the Melotti indicators until I switched to Corse which have inbuilt resistors.I still have the resistors at home.When I get home tonight I will let you know whats written on them.


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post #3 of 17 (permalink) Old 05-22-2014, 01:12 AM
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The ohm value will set the flash rate the wattage rating relates to how much load the resistor can handle the higher the wattage rating the cooler the resistor will run. Question did you wire the resistors in series or parallel, they need to be in parallel. I wouldn't put the 1 ohm in parallel and possibly not the 10 ohm you could short somthing out, when Mitchy gets back back to you with a value try that in parallel.
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post #4 of 17 (permalink) Old 05-22-2014, 04:41 AM
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I got home from work and took a photo of the Melotti resistor and the writing on the resistor doen't mean a lot to me but I hope it helps you mate.

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Last edited by mitchy; 05-22-2014 at 04:43 AM.
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post #5 of 17 (permalink) Old 05-22-2014, 06:07 AM
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That's the heat shrink rating on the covering of the resistor...

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post #6 of 17 (permalink) Old 05-22-2014, 09:06 AM
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I have a bunch of extra resistors from the Rizoma signals I have installed and you can have them if you want. If you ran the signals without any resistor you may have burned them out, sorry to say. I did that with a $60 Rizoma. Nothing to do but get a new one.

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post #7 of 17 (permalink) Old 05-22-2014, 09:43 AM
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Got a pic of what you have George, it sort of depends on the amount of diodes per indicator, but from what I remember here on the forum, most where between 20 and 30 Ohm.
A bit like these http://www.ebay.com.au/itm/Motorbike...p2054897.l5661
Or theses http://www.banggood.com/Motorcycle-T...FVgnvQodUGIA-A

Can you warm that heat shrink Mitch and pull it of to check the resistor value?

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Last edited by Donsy; 05-22-2014 at 09:46 AM.
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post #8 of 17 (permalink) Old 05-22-2014, 11:01 AM
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Haupti...you have to back calculate the resistance from the original load on the system. How many watts (each side) were the bulbs you are replacing?

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post #9 of 17 (permalink) Old 05-22-2014, 02:13 PM
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Quote:
Originally Posted by Donsy View Post
Got a pic of what you have George, it sort of depends on the amount of diodes per indicator, but from what I remember here on the forum, most where between 20 and 30 Ohm.
A bit like these http://www.ebay.com.au/itm/Motorbike...p2054897.l5661
Or theses http://www.banggood.com/Motorcycle-T...FVgnvQodUGIA-A

Can you warm that heat shrink Mitch and pull it of to check the resistor value?

the installation instructions use wattage values of the oem indicators. One resistor is used for 10Watt systems and 2 resistors for 21 Watt systems. When I installed the Rizomas on my 2007 F4 I used 1 resistor. You cannot hurt the diodes by installing resistors too large. It will just slow down the blinking. How these would work with a different brand is an unknown since my multimeter quit working so I cannot check the resistance. Probably 10 ohms. I have at least 4 if you want them
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post #10 of 17 (permalink) Old 05-22-2014, 02:15 PM
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Quote:
Originally Posted by silentservice703 View Post
Haupti...you have to back calculate the resistance from the original load on the system. How many watts (each side) were the bulbs you are replacing?
The MV is a 10 watt system
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