Click & Collect or Delivery options available.
LITHIUM-ION CHARGING SYSTEM CONVERSION (RMS900-106857)
$1,339.99
Brand new aftermarket stator, magneto flywheel rotor, lithium-ion-compatible voltage regulator, gasket and connector kit.
- Crankcase cover gasket included.
- Connector kit included.
- All products are tested.
Stator
- Direct replacement for the original unit.
- Plug-and-play, direct fit and easy installation.
- High-grade lamination materials.
- High-grade copper windings resistant to temperatures up to 200°C.
- Connector included.
- Rubber grommet included.
MOSFET Voltage Regulator Rectifier – Lithium Batteries Only
This advanced MOSFET voltage regulator is designed specifically for lithium batteries. It runs cooler than traditional SCR diode-style OEM regulators and includes overheat protection. If the unit overheats, it temporarily shuts down to cool rather than continuing to operate at excessive temperatures.
Why Use MOSFET Enhanced Technology?
- Runs cooler: Operates at lower temperatures than traditional shunt voltage regulators.
- Saves fuel: Reduces the load on the stator, requiring less engine work and fuel.
- Steadier charging: Provides smoother, more stable power to the battery.
- Extended battery life: Helps extend battery life and maintain cold-cranking capacity.
- More engine power: Reduces stator load, allowing more engine power to be available.
- Improved longevity: Advanced design lowers operating temperatures for better performance and service life.
- Optimised power delivery: Regulates power by switching the stator coils on and off.
Regulator Features
- Works with lithium batteries only.
- Direct replacement for the original unit.
- Plug-and-play, direct fit and easy installation.
- Quality exceeds the OEM part.
- Higher-grade electrical components.
- Opposite connector for the main harness side included. These connectors are commonly affected by melting, corrosion and defects that can cause recurring electrical issues.
Why Do Lithium Batteries Need a Different Voltage Regulator?
Lithium batteries have different charging requirements from lead-acid and AGM batteries. These differences can significantly affect battery lifespan and performance. Two important factors for safe and reliable lithium battery charging are DC voltage ripple and average output voltage. This RMSTATOR regulator is designed around the optimal parameters for these factors.
The Ripple Effect
Charging voltage ripple is the difference between the highest and lowest voltages at the regulator output. Traditional shunt-style regulators can produce relatively high voltage ripple because their regulation switches open and close frequently. Each transition causes variations in output voltage. Keeping this ripple low is particularly important for lithium batteries.
Ideally, ripple would be less than 10% of the output voltage (approximately 1.5 V for a typical regulator), although this is not practical for this type of regulator. The RMSTATOR lithium regulator maintains output ripple below 4 V, compared with verified competitor test results of 8 V. This ripple is measured using an oscilloscope sampling voltage thousands of times per second. It is not the same as average charging voltage measured with a multimeter.
Before Installing the New Stator
- Check the AC output of the stator.
- Replace any burned or corroded connectors on the stator and regulator rectifier.
- Check and repair any melted wiring.
- Apply high-temperature dielectric grease to all connectors.
The stator may use a different wire colour code from the original part. All wires are installed in the correct order; do not change the wiring configuration. This stator is designed as a direct plug-in replacement. Always use thread-locking compound when securing the stator bolts. If the stator includes a pickup coil, check the air gap during installation. Adjust it as close as possible, but no less than 0.010 inches.
Before Installing the New Voltage Regulator Rectifier
- Check the AC output of the stator.
- Replace any burned or corroded connectors on the stator and regulator rectifier.
- Check and repair any melted wiring.
- Apply high-temperature dielectric grease to all connectors.
Flywheel Installation
Before starting the Yamaha motorcycle, adjust the air gap. Rotate the flywheel until the raised node is aligned with the pickup/pulser coil. Adjust the gap as close as possible, but no less than 0.010 inches.
Warning
Risk of electric shock. Disconnect the battery before servicing. Installation should be carried out by a qualified technician to avoid malfunction.
Stator Dimensions
- Interior diameter: 18 mm
- Exterior diameter: 68 mm
- Thickness: 42 mm
- Stator-to-grommet wire length: 125 mm
- Grommet-to-plug wire length: 500 mm
Other Stator Specifications
- Number of wires: 3
- Number of plugs: 1
- Number of pins: 3
- Alternator resistance: Between each white wire = 0.4 ohms ±20%
Regulator Dimensions
- Width: 94 mm
- Length: 114 mm
- Height: 32 mm
- Mounting hole centre-to-centre distance: 74 mm
Other Regulator Specifications
- Number of plugs: 2
- Number of pins: 5
- Number of wires: 5
- Minimum charging voltage: 14.0 V ±0.2 V DC
- Maximum charging current: 50 A / 500 W
- Operating temperature: -20°C to 85°C
Flywheel Dimensions
- Exterior diameter: 80 mm
- Interior diameter: 69 mm
- Centre housing interior diameter: 12 mm
- Centre housing exterior diameter: 18 mm
- Exterior thickness: 11 mm
- Interior thickness: 6 mm
Shaft Diameters (Largest to Smallest)
- 26 mm
- 20 mm
- 18 mm
- 15 mm
Shipping Once your payment has been confirmed, we make every effort to get your items to you as quickly as possible.
Our items are shipped from our Auckland-based storage facility or our shop, so please allow between 2-4 business days if you are in an urban area, and a little bit longer if you are a rural address.
We use NZCouriers and CourierPost as our shipping companies.
They cannot deliver to PO Boxes, and items must be signed for. If delivering to a company address, please ensure the company name is included in the address details. Please note: items purchased after 2.00pm may not be dispatched until the following business day.
Weekends and all public holidays are not classed as business days. Items purchased on non-business days will be processed on the first available business day.
If you are not 100% happy with your purchase, you can return it within 14 days of receipt for either an exchange, store credit or full refund of the price paid (less any shipping costs). Please adhere to the following conditions for returning your item:
- Items must be in new and saleable condition, with original packaging, labels, tags and all accessories intact
- Product packaging must be wrapped / protected before shipping to avoid damage. Do not stick anything to product packaging
- Items must be undamaged and unused
- Items must be returned freight paid (for your security, we recommend you use a courier that requires signature delivery)
- A note explaining the reason for return/exchange request and your contact details is sent with the item If you have any concerns about your return meeting these conditions, please contact us before sending, thereby avoiding unnecessary courier costs. Exchange Procedure If your original order qualified for freight free delivery, any additional exchanges on the same order will incur a freight charge.
Refund Policy Due to security measures, refunds will be processed back to the credit card or bank account used for the original payment. Refunds will be processed within 5 business days of receipt of the returned item. If an item needs to be returned due to a defect or warranty issue, please make contact with us and we will endeavour to sort it out for you.