Question about 2008 Beta RR 400

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General electronics Can someone explain silicon rectifiers and pointless regulators to me? I'm having some electrical problems and these are the two things that I don't understand in my harness. What do they do

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And what wouldn't work if one or the other went bad? Right now when I turn the key from OFF to ACCESSORIES the headlight will come on and the starter will run when pressed (the bike won't start though) but when I switch the key to IGNITION everything goes dead. The switch is new so it's probably not that. I'm not an electrical system expert but this guy's page has helped me many times. He discusses rectifiers about a third of the way down... but you'll probably learn a lot by reading the whole page and eventually the whole site. He has really good info about most aspects of MC repair.,,

Posted on Nov 10, 2008

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Where can i see rectifier on my burgman 125uh 2003 model..which part of the scooter thanks in advance

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Oct 28, 2015 | Motorcycles

1 Answer

1993 Vmax. Why is regulator/rectifier overheating?

You are not going to like this answer but here goes. All Motorcycles, mopeds, scooters, quads, etc, that have have a stator to regulator/rectifier to battery generating system all have the same design flaw. They all have lousey electrical connectors. Heres what happens: the stator produces 204-220 volt ac current. The same thing that will run an electric dryer in your home. It's a lot of power. That power gets changed to dc current by the recifier and converted into about 15 volts by the regulator in the same unit. That's a lot of heat energy. If at any time the electrical connections become compromised by vibration, oxidation, dampness, salt, or will see the wires fry. It's an over load...not a short. Power sports shops are well aware of this and are happy to charge you list price to replace the entire system for several hundred dollars. Usually between $800-$1000. You can get after market sets of the component parts and do it yourself and that's the only way I know of to avoid the cost & it still ain't cheap. Many moto-X riders replace the connectors with automotive plugs that seal out water, dust, etc with a recessed plug with a silicon gasket and seal it with dielectric grease to prevent oxidation. Like the plugs on a car's O2 sensors. Hope this has been helpful, Sorry to be the bearer of bad news.

Jul 31, 2015 | Yamaha Motorcycles

1 Answer

Generic xor 125 2012 model

rectifiers all perform the same job. They convert ac voltage to dc and regulate how much gets let out to protect the battery and other modern electronics. Most all stators are supposed to put out 30-32 volts ac. The rectifier converts that to dc which equals about 15 volts. Your main concern is being able to supply the motors draw and charge the battery without cooking everything. The smaller the draw ( i.e. headlights, taillights, radio, heated grips, piaa's) the smaller the rectifier needed. So check the specs and resistance on the rectifier you intend to use.

Aug 27, 2014 | Motorcycles

1 Answer

Alternator not charging

Hi, Anonymous and the usual suspects are:
1. Voltage regulator/rectifier not grounded.
2. Engine ground wire loose or broken.
3. Faulty voltage regulator/rectifier module.
4. Loose or broken wires in charging circuit.
5. Faulty stator and/or rotor.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
How to test and repair the charging system on scooter
Motorcycle Battery Charging System Explained
How to diagnose and repair motorcycle charging problems
benelli velvet service manual pdf 1 Search Document com

Jul 18, 2013 | Benelli Velvet 125 Motorcycles

1 Answer

Suzuki boulevard rectifier problem

Suzuki recalled the regulator/rectifiers in 2011. Check with your dealer, however get a voltmeter installed at the same time as the replacement caused $3,000.00 damage to my electrical system by overcharging my battery and Suzuki won't stand behind it!!!!!!

Sep 19, 2012 | 2008 Suzuki Boulevard C109RT

1 Answer

Hi hope someone can help my o8 r1 has an intermittent problem the engine dies at low revs,i have just had it serviced including new air filter now it is worse it restarts ok and idles ok any ideas

Well many years ago I used to production race Yamaha motorbikes, I have always found them to be among my favorites.

When ever I had a problem like that I would always swap out my electrics, the whole lot, plugs leads, coils, ignition, distributor, the lot... Now if the problem then remained, it must be petrol, either not enough, or a blockage or even an air lock in the tank, but mainly carburetor or injectors, or indeed the electronics to do with the injectors, yous is however I would think is a normally aspirated motor? anyway, to this end, it was, then, Petrol flow, float bowl, float bowl inlet valve, Jets and idle.filters. All one can really do is isolate and swap out suspected components. It can get expensive. But unless one can point the finger directly at a known faulty bit, one has to work through the list, so to speak.

When a motor dies at low revs, usually it is something in common to ALL the Ignition/Firing/Fuel system, as most often a single system failure, unless a major one like NO fuel, well, a single system, say like a, one, bad spark plug lead/plug, well this may cause a problem, but not a complete loss of power see?

Also dying at low revs can often be an alternator/magneto problem, depending on what's used, here we must check the Connections, Diodes etc, that rectify the Voltage and also the Voltage Regulator, Vreg. both of which can cause a loss of power and a cut out, when at low revs, either there isn't enough voltage/current being generated, or if there is the Vreg is failing/failed. Intermittent problems are the hardest to find.

Now if using a "Pointless" system of distributor, then make sure that the "sensor" in the distributor is working OK., again the only way to tell is to swap out, blind, and see if any different.

Ensure too that the Electrical Earth of the system is good and secure too. Also check the battery & connections too.

Hope this may help...

Apr 25, 2011 | 2007 Yamaha YZF-R1

2 Answers

How do iknow if my voltage regulator is bad on my 1993 yamaha fzr 600

hi normaly replacing it with another 1 is sometimes the only way to tell, even when tested some electrical items *** up as testing ok, and when you replace them the fault is cured, what is the fault you are getting? is your machine fitted with a seperate voltage regulator, most machines have a regulator rectifier combined, the rectifier converts alternating current ac to direct current dc, where as the regulator controls the amount of voltage, regulator problems overcharging, rectifier problems not charging, and discharging as the rectifier only alows current to travel in 1 direction, when it fails the battery voltage can then travel past it causing a discharging state

Jan 04, 2011 | Yamaha FZR 600 Motorcycles

1 Answer

What is the function of rectifier? And how will I know if it is broken already

The rectifier convers AC current to DC current by blocking the wrong polarity of charge from the altenator allowing the correct polarity charge to enter the battery and run the electrical stuff on your bike. If the rectifier or Diode Pack fails, you will not be able to charge your battery and if it is short circuit will flatten the battery very quickly. There should be some form of regulator after the rectifier that stops the battery from being over charged.
Hope this explains it for you.

Dec 31, 2010 | Sym Husky 125 Motorcycles

1 Answer

The battery will not stay charged and the regulator rectifier get hot after running the bike for a short period of time. bike runs but not well when you disconnect the negative battery cable

sounds like the regulator/rectifier has failed. you need to check that you are getting 13.5 14.8 volts at the battery when bike is running, higher means failed unit and under means same. you need a diode tester to measure reg/rectifier and will also need to check stator output with multi meter on AC, should get 60-100 volts when bike revved with stator wire unplugged from regulator.
best solution is to take to your local shop and get them to perform these and other tests to confirm as electrical parts are generally not returnable once purchased as very easy to damage if put into a bike with other charging system faults

Aug 31, 2010 | kawasaki ZX-6R Motorcycles

1 Answer

Replace regulator/rectifier with a different brand?

Not always necessary to change the regulator/rectifier. Check all connections to make sure they are clean, use a good contact cleaner and finish off with dielectric grease on your electrical connections.
When some bikes get a few years on them the connections get dirty. Check to see if there are any burned or discolored wires anywhere around the regulator. The FIX on some bikes is to cut the connector completely out and solder the wires together and either seal them with heat shrink of a good electrical tape. Loose or bad connections get hot. As long as the regulator and rectifier are working there is no need to replace them if the connections are good.
Ride Safely, Ed

Apr 08, 2010 | 2005 Kymco Zing 125

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