Regulator/Rectifier - MVAgusta.net
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post #1 of 37 (permalink) Old 03-15-2018, 11:04 AM Thread Starter
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Regulator/Rectifier

Hi,

Brutale Dragster 800 rr 2015.

So i've been having issues with juice. So the symptoms is the bike doesn't start. I think the battery is slowly draining to the point it doesn't have enough juice to fire it up. I tend to get an E00 battery error code. On holding in the started button and pulling in the clutch (sprag issues) the biek attempts to turn over then stops and the dash dies on me.

What have I done to try to remedy this? I've replaced the OEM SLA with a Yuasa YTZ10. Twice.
I've also swapped out the regulator/rectifier for a part from https://www.boonstraparts.com/.
Second hand I know, but I thought it would be ok.

The problem still persists.

I've got a voltmeter turning up tomorrow to check across the battery and to check voltage on starting and a load test. I'll post these results up for more information when I have them.

It has oxford grips on it that are hooked up to the battery. Which I think coincides with the start of the issues. I'm going to disconnect these from the battery as the weather has warmed up now.

It also has a tracker on it.

My question is this. How do i check the regulator is doing it's job properly and that the problem isn't further up the foodchain, i.e. the stator etc. Which I don't think it is as the bike runs fine for a week or so.

Any advice is gratefully received.

cheers.
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post #2 of 37 (permalink) Old 03-15-2018, 11:08 AM
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"the bike attempts to turn over then stops and the dash dies on me"

Your battery is empty/dead. Put your bike on the charger when you get home from riding. After every ride.
If your battery isnt holding its charge, its a broken battery get a new one.

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Last edited by Black_Gold_Saw; 03-15-2018 at 11:14 AM.
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post #3 of 37 (permalink) Old 03-15-2018, 11:25 AM
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Troubleshootng is in the manual!!!!

@Digital: Please download you manual form Donsy's site here: Team Double 3 Racing | MV Agusta

Here is one procedure outlined:


Team Double 3 Racing | MV Agusta

You can also check that voltage at the battery terminals. Engine RPM 2000 or greater.
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post #4 of 37 (permalink) Old 03-15-2018, 11:55 AM
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The tracker will draw a surprising amount from the battery but it sounds as if the issue is with the hot grips.

My understanding is that these really shouldn't be connected directly to the battery

Proud owner of a 2015 F4 and a graduate of the school of 'stupid hurts!'
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post #5 of 37 (permalink) Old 03-15-2018, 12:00 PM Thread Starter
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cheers.

Could be a coincidence, surprised that 3 batteries would be dead in quick succession.

Don't worry about the manual, it's already downloaded .
Read up on the testing, but can't do until the multi meter turns up.

I'm at work so cant check directly, so sorry if stupido question and apologies in advance if I'm an idiot.

But, this battery here. https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1
it has the same spec as the OEM one?
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post #6 of 37 (permalink) Old 03-15-2018, 12:28 PM
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I'm going out on a limb here and assuming you are not stupid. Of course baiting doesn't' help.

You can continue to replace batteries until the cows come home, but if the problem reared its ugly head when you did the grip installation, then the problem is related to that.

If the problem started when you installed the immobilizer, then the problem is related to that.

Disconnect one and fully charge your battery. See what happens. The try it with the other.

As for the Yuasa YTZ10S...that is the battery that I have in all of my MV Agustas. It is the battery I unapologetically recommend.

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post #7 of 37 (permalink) Old 03-15-2018, 01:05 PM Thread Starter
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Good. Just wanted to make sure the battery specs were sound
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post #8 of 37 (permalink) Old 03-15-2018, 09:20 PM
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You may need to do a current draw test with your multimeter.
Disconnect negative battery terminal.
Connect red probe to battery cable.
Connect black probe to battery terminal.
Reading should be less than 50mA.
If it is above you need to start disconnecting accessories to see where the current draw is from.
Before you do any of this your battery must be at full voltage.
Good luck.


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post #9 of 37 (permalink) Old 03-17-2018, 05:55 AM
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I don't see any mention of a battery maintainer/tender. Do you have one? Do you park where there is a power outlet? With the addition of your heated grip and tracker you have more potential parasitic drain. Motorcycles notoriously ruin batteries due to low useage and small capacity. So, even if there is a problem keep the bike on a tender.

Love the Dragster RR. It was my gateway drug!
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post #10 of 37 (permalink) Old 03-17-2018, 05:57 AM
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If you are drawing, say 45mA from your tracker/alarm then that will kill a new battery dead in around 150hrs of no charging.

Fwiw-I have Oxford heated grips on mine...cause no problems.

Get a new battery, fully charge it, fit it and fire the bike up. Rev to around 4000-5000 The voltage across the battery terminals should be between 14v and 15v. If it is your reg rec is fine.
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