It is important that you exercise caution when testing the voltage to avoid being shocked and you should know the basic safety requirements for working with electric systems. Auto VR is a stabilizer. There are two connectors on the regulator/rectifier. Use a 12 volt battery with an ampere-hour rating of at least 18 AH. Click here to download a set of instructions that you can print out. So it just runs the battery down because its getting no charge at all. Place the red probe (+) on the anode the diode. Put the multimeter's negative lead on the positive terminal of the black two-terminal connector. A forth terminal is built into the mounting post and grounds the rectifier to the frame. If the readings are not within the normal range, it is time to begin testing the charging system components. You cannot test the new MOSFET regulator/rectifiers in this way, as they don’t use standard diodes. Using the multimeter, test the same battery terminals again. The rectifier converts the three AC-phases to a single 14.4 Vdc output, a ground and a positive. Set your multimeter to measure DC voltage and connect the positive and negative leads to the matching battery terminals. It looks like this: A popular upgrade is to combine the rectifier and regulator (the zener diode) with one, single unit. This is the place a rectifier or can say the regulator come into existence. To do this, place the positive lead into the positive diode. How to make a reliable motorcycle voltage regulator. How to Test a Motorcycle Rectifier using a digital multimeter The multimeter should be set to Volts DC. This is where the Rectifier comes in to play. Fit for XL600 XL600R 1983-1987 Motorcycle. Check the resistance between the pins and earth (the chassic, or the negative terminal of the battery). With nothing connected, the needle will be at rest, over to the left. Hopefully this will help someone somewhere! $29.99 $ 29. Note the reading you get. Fit for XL250 XL250R 1984-1987 Motorcycle. A Rectifier is the part of the charging system that convert the AC voltage from the alternator into DC voltage which can be used to charge the battery. If you have a factory original rectifier, make sure you have a new battery in your multimeter – the diodes are chunkier than on the modern equivalents. First, check the positive diode. These components are probably the most mis-diagnosed parts in the charging … In the tests below – the green arrow on tests 1, 3, 5 and 7 indicate that you should see a value on your multimeter. Start the motorcycle and rev the motor to 5000rpm. The rotor is mounted directly to the engine’s crankshaft. Set your multimeter to diode test. In this piece of writing, we will try to address “what does a rectifier do to a motorcycle?” We will try to understand the underlying working of the rectifier and how it is responsible for providing DC power to … Here I am only testing the regulator portion of a common Regulator/Rectifier. With your leads connected to each other, your multimeter will read 0. You could also perform some basic postmortem checks on the regulator/rectifier itself, and attempt to determine what has failed, internally if you have the necessary test equipment. If the readings are not within the normal range, it is time to begin testing the charging system components. Make sure you throw the defective part away, rather than put it in a drawer in your workshop. If you believe you are qualified to proceed, then the next step is to check running voltage across the battery. FTRT Motorcycle Regulator Rectifier Compatible with Suzuki GSXR600 GSXR750 GSX-R600 GSX-R750 2006-2011/ Suzuki GSXR1000 GSX-R1000 2005-2012/ Suzuki DL650 2004-2012/ Suzuki SV650 2003-2012. To determine that the regulator/rectifier is working properly, it's necessary to test each of its diodes. This is because older motorcycles often have inadequate charging systems, depriving you of a lot of potential power. the volt drop as current passes through in the right direction). This value will vary per unit but importantly the value from all four readings should be the same or very nearly the same. Most modern multi-meters come with a diode test function. First perform the static stator tests. Motorcycle Regulator Rectifier Connectors Regulator and rectifer, generator and stator wiring connector plugs that are used on older and modern Japanese motorcycles using the unsealed 6.0mm and 6.3mm terminals to the modern Honda, Suzuki,Kawasaki and Yamaha that use the sealed type connectors. Fit for XL500 XL500R XLX350R XLX 350R 1982 1988 Motorcycle. Connect. As the magnets in the rotor spin round they excite the coils of wire which are embedded in the green resin on the stator. Types of Motorcycle Regulator/Rectifiers There are two main types of alternator that are fitted to most motorcycles, each requiring a different type of regulator rectifier. Generally, the three yellow wires connect to the three wires from the stator. Unfortunately, these are not user serviceable or repairable, so you need to replace it. Your battery should be charged, giving you a reading of approximately 12.5-12.9 volts DC (check your particular battery’s specifications for exact numbers). Then the AC-current is led through the rectifier inside the regulator-rectifier-unit. With the Battery on the bike and connected … Selenium rectifiers are recognizable by the cooling fins, which are often painted green or orange. IGNITION OFF. This handheld tester allows you to test the voltage and will help determine if the rectifier should be replaced. The motorcycle regulator, rectifier tester circuit presented here can be used to test a 6-wire shunt type regulator-rectifiers for a 3-phase charging system of motorcycles. Please check with an experienced GSR member before using a part you picked up from ebay. Here is the testing procedure as printed in the 1970 onwards Norton Commando Workshop Manual: I don’t think their description of the test procedure is particularly clear. Ricks Motorsport Electrics offers the industry’s most reliable OEM rectifier-regulators, including a full line uniquely designed to also work with lithium ion batteries. eBay Motorcycle Rectifier Regulator Review. Place the black probe (-) on the cathode the diode. Step 1. With your test leads connected to each other, the needle will be at the opposite end of the scale resting on the stop – reading 1. Motorcycle VR is a rectifier + stabilizer. Your battery should be charged, giving you a reading at or just above 12 volts. You will be looking for a voltage range of 13.2 Volts DC and 14.8 Volts CD. The rectifier regulator converts AC power to DC allowing the alternator to charge the battery, and controls the amount of power delivered to the battery. Next, connect your negative lead to the stator inputs. I suspect I have a bad Regulator/Rectifier unit as I am getting A/C from the alternator into the unit but when rev'd I get nothing out. As always, the internal electronics and overall build quality of motorcycle regulator rectifiers vary between manufacturers. The display will read “OL” which means “Open Line” when there is nothing connected to your test leads. Your email address will not be published. The ORIGINAL RECTIFIER looks something like this: The diodes on the original units were prone to rattling off, due to the vibrations on cars and bikes. If you’re restoring your vintage Honda or Kawasaki motorcycle, one of your key priorities should be getting an upgraded rotor. If you are seeing lower readings, that implies that there is a failure in your charging system and the rec/reg may be the culprit. Many Rick’s Motorsport Electrics Rectifier/Regulators eliminate what is commonly referred to as a “signal wire” on OE pieces. The is now DC, and can be used to charge the battery! Touch the other probe to any chassis ground. To service these bikes I add a removable ground wire so it can be used for … The “Full Wave Bridge Rectifier” to give it the correct name uses four diodes which basically takes everything below the green line, flips it, and puts it above the line! How to Test a Motorcycle Rectifier The motorcycle’s rectifier is another part of the charging system. You should produce a set of 8 numbers – follow the process below, and write the numbers down as you go, so you don’t lose track. Ok, bringing this one back. 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