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Yamaha FZR400 Racing Alternator Kit 98-02

Product "Yamaha FZR400 Racing Alternator Kit 98-02"

Please select the appropriate model year for your model, as well as the suitable accessories for installation and successful operation!

This is a complete, ready-to-install race alternator kit consisting of the rotor, stator, mounting plate and the dedicated regulator/rectifier. The kit is supplied pre-assembled with all necessary connectors.

In short: the significantly lighter rotor with a much smaller radius results in drastically reduced gyroscopic forces acting on the crankshaft. The effect is immense:

  • Easier direction changes, especially in quick chicane transitions
  • Much faster engine-speed matching when downshifting under braking, resulting in:
    • quicker downshifts
    • less chassis disturbance, improved rear-end stability
    • more time and confidence when turning in
    • later braking
  • Improved throttle response and faster acceleration

A typical power gain is around 5–6 hp, although this varies slightly from engine to engine.

The kit uses a compact 45 mm rotor weighing only 198 g.

This not only reduces the effective rotating mass on the crankshaft—since the new rotor is 78% lighter than the OEM unit (198 g vs. 890 g)—but more importantly reduces gyroscopic forces thanks to the much smaller radius (45 mm vs. 120 mm). For comparison: at 14,000 rpm the OEM rotor reaches a tangential speed of approx. 320 km/h, while the race rotor spins at only about 120 km/h.

The key performance advantage comes from the fact that a lighter rotor with a smaller radius is far easier to accelerate and decelerate.

Most racing alternators also use a smaller rotor, but typically with far fewer windings. This results in low and inconsistent output, and they still rely on the OEM regulator—which is not designed to handle surplus power at racing rpm and converts it into damaging heat.

Our alternator kits also feature a compact rotor, but we use high-efficiency, fine-gauge copper wire for the windings. This enables us to deliver strong and consistent power from lower speeds (approx. 4000 rpm).

Another key benefit is the intelligent switching system inside our dedicated regulator/rectifier. Once the required voltage is reached, no additional electrical load is generated at the crankshaft. This keeps the regulator significantly cooler and far more reliable. For this reason, never use our race alternator kits with the OEM regulator.

Insbesondere für die besonderen Ansprüche hinsichtlich notwendiger Kapazitätsreserven in Verbindung mit einer Racing Lichtmaschine empfehlen wir den Einsatz einer LiFePo4 Versorgungsbatterie mit mind. 7,5 Ah, besser 10Ah. 

When using a racing alternator, we advise against the use of a lithium polymer battery.

To remove the original flywheel, you will need a puller.

Pullers and LiFePO4 batteries are available here in the shop.

Compatibility

BrandModelYears
YamahaYAMAHA FZR4001988-1994

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ZUBEHÖR & ERSATZTEILE RACING LIMA´s

REPLACEMENT STATOR Racing ALTERNATOR
REPLACEMENT STATOR Racing ALTERNATOR

SPAREPART STATOR FOR RACING ALTERNATORS This is the basic stator only intended as a replacement part for those who are confident in wiring and fitting or including the statorcup and stator installation from us. Please choose in the options!   For DIY-Buyers: The damaged stator can be removed by being pressed out. Take note of where the stator wires should end up in relation to the stator cup fixing holes and heat the stator cup on a hotplate or similar - the stator should then drop in.  Please ensure that the wires do not touch the hot stator cup and that the stator finishes flush and fully home in the cup.  The stator core should only just be visible over the edge of the stator cup. Once cool the sheathing, grommet and connector block can be recovered but fresh crimps will be required. Please note some early model generators had a slightly different size stator, in this cases please order with stator cup!  

Regular price: From €329.00
REPLACEMENT REGULATOR Racing ALTERNATOR
REPLACEMENT REGULATOR Racing ALTERNATOR

Spare Part: Regulator for Racing Alternator 3 Phase Regulator/Rectifier. Every year a high number of alternators fail due to lack of heat transfer and cooling. One reason for this is imbedded in the design of many Japanese and aftermarket regulators. They work by short circuiting the generator, and by doing so the regulator is running at 100% capacity all the time. This way the excess power produced at high rpm by the generator is transferred from electrical energy to heat in the alternator and the regulator. Our regulators work by disconnecting the alternator from the regulator when there is sufficient voltage in the battery. Because the alternator is running without any load it produces less heat and resistance. This design lengthens the life of both the alternator and the regulator, and less resistance on the engine (= more power). The ultimate output of the regulator voltage is adjustable and this product is suitable for use with all types of Lithium racing batteries. There is an LED fitted to the regulator which shows when the regulator is overcoming load on the system. This will work with ALL types of 3 phase alternators and generators. The 3 phase Regulator/Rectifier MUST run with a battery at ALL times. Connection: The regulator is connected to the alternator by the 3 wires in no particular order. The red wire is connected to the battery +ve, via a fuse (fitted). The black wire is connected to the battery –ve. The housing of the rectifier has to be earthed with fitting directly to the body or with an extra wire. The thin blue wire is connected to a switched +ve 12V supply (so no drain occurs when the vehicle is off). You cannot test or run the regulator without the battery connected. The battery and alternator must be charged and in good working order. Always ensure the battery is fully charged before starting. When mounting the regulator please ensure there is good airflow and as much space as possible around it. Spacers behind the regulator will allow extra airflow behind it.

Regular price: From €275.00
RACEPACE LiFePO4 Endurance Power
RACEPACE LiFePO4 Endurance Power

You are ordering a RACEPACE LiFePO4 Endurance Power battery – a high-performance battery system consistently engineered for racing applications. The focus is on electrical stability, repeatable power delivery and maximum reliability under heat, vibration and high current peaks. Compared to conventional motorcycle batteries, the Endurance Power series offers up to 75 % weight reduction while providing significantly higher performance and a substantially extended service life. Polyimide-insulated individual cells – stable electrical safetyEach individual 26650 cylindrical cell is equipped with a high-temperature, electrically stable polyimide insulation layer. This ensures permanently consistent electrical isolation even under thermal stress, vibration and tightly packed cell configurations. Unlike conventional PVC insulation, polyimide maintains its insulation properties across a very wide temperature range and throughout the entire service life – a decisive advantage in racing environments. Copper busbars & precision spot weldingCell interconnections are realized using low-resistance copper busbars, joined by a transistor-controlled bipolar spot-welding machine. Pneumatically regulated electrode pressure ensures reproducible weld quality with minimal thermal stress on the cells. Active cell balancing & external fine-balancing portAn integrated active balancer continuously monitors all cell voltages and intervenes from a voltage difference of just 0.1 V – even during charging. Cells are actively balanced down to approximately 0.01 V. In addition, an external balancing port allows targeted fine balancing using smart chargers. Fine balancing is recommended once per race weekend. Robust, high-temperature & impact-resistant enclosureThe newly developed enclosure is manufactured from a high-performance engineering polymer offering excellent temperature resistance, high impact strength and long-term dimensional stability. It reliably protects the battery pack from mechanical and thermal stress under real racing conditions. Manufactory quality – Made in GermanyEach RACEPACE Endurance Power battery pack is manually assembled and tested. The result is not a mass-produced product, but a deliberately over-engineered high-performance energy system. Optional high-current terminals & adapters: 75A battery terminal instead of standard ring terminals matching 75A onboard connection adapter matching 40A onboard charging adapter 40A charging cable for compatible smart chargers RACEPACE LiFePO4 PARAMETER 5.2 Ah 7.8 Ah 10.4 Ah 13 Ah 15.6 Ah Voltage 13.2V 13.2V 13.2V 13.2V 13.2V Number of cells 8 12 16 20 24 Capacity at 23°C 5.2 Ah 7.8 Ah 10.4 Ah 13 Ah 15.6 Ah Max. continuous discharge 104 A 156 A 208 A 260 A 312 A Max. discharge pulse (10s) 240 A 360 A 480 A 600 A 720 A LxH 110x79 mm | W 56 mm 83 mm 110 mm 137 mm 164 mm Weight 0.75 kg 1.10 kg 1.40 kg 1.75 kg 2.10 kg CHARGING AND OPERATING PARAMETERS PARAMETER 5.2 Ah 7.8 Ah 10.4 Ah 13 Ah 15.6 Ah Recommended charge current 5A 8A 10A 10A 10A Max. continuous charge current 52 A 78 A 104 A 130 A 150A Charge cut-off voltage 14.4V   Float charge voltage 14V   Discharge temperature range -30°C to 60°C   Charge temperature range 0°C to 60°C   Storage temperature -40°C to 70°C   RACEPACE LiFePO4 TECHNOLOGY – FEATURES AT A GLANCE TECHNOLOGY FEATURES ADVANTAGES Polyimide cell insulation Additional insulation on every individual cell High dielectric strength Electrically stable at elevated temperatures Mechanically stable under vibration Long-term stable electrical insulation Reduced risk of leakage currents Increased operational safety Consistent racing performance Active cell balancing Active from 0.1 V voltage difference Balancing during charging Balances down to approx. 0.01 V Energy-efficient with minimal heat generation Maximum usable capacity Uniform cell aging Significantly extended service life Stable long-term performance External balancing port Dedicated connector for smart chargers Targeted fine balancing possible Independent of onboard charging system Preventive stabilization of the cell pack Recommended for racing use Full control instead of a black-box battery Copper busbars & spot welding Low-resistance copper busbars Transistor-controlled bipolar welding Pneumatically regulated electrode pressure Minimal thermal stress on cells Extremely low contact resistance High cranking current capability Reproducible manufacturing quality Maximum electrical efficiency High-performance enclosure High-temperature resistant engineering polymer High impact resistance Dimensional stability under continuous load Protection against heat & vibration High mechanical safety Designed for racing environments   PERFORMANCE DATA AND EFFICIENCY PARAMETER VALUE DESCRIPTION Usable capacity 94.2% at 1C discharge (10.4Ah version) Capacity after 1000 cycles 86% at 1.2C charging (25°C) Weight reduction up to 75% compared to conventional motorcycle batteries Discharge temperature range -30°C to 60°C Extreme temperature range for all applications IMPORTANT SAFETY INFORMATION Water protection Do not immerse the battery in water or expose it to moisture Fire protection Do not throw into open fire or expose to extreme heat Mechanical Do not open, puncture, or mechanically damage the battery Electrical Avoid short circuits and reverse polarity at all costs Charger Use only chargers suitable for LiFePO4 with CC/CV characteristics CERTIFICATIONS AND STANDARDS SAFETY TEST RESULT STANDARD Nail penetration ✓ Passed EUCAR4 Deep discharge ✓ Passed EUCAR3 Thermal stability ✓ Passed EUCAR4 External short circuit ✓ Passed EUCAR3 Crush test ✓ Passed EUCAR3 Overcharge ✓ Passed EUCAR2 Quality standards: UN 3480 (UN38.3), UL 1642, UL1973, IEC 62133-2, REACH, RoHS, ISO-14001, TS/IATF-16949, ISO-9001

Regular price: From €199.00
SPARE ADAPTER PLATE COIL Racing ALTERNATOR
SPARE ADAPTER PLATE COIL Racing ALTERNATOR

ERSATZ ADAPTERPLATTE SPULE RACING LIMA

Regular price: €145.00
Puller 2-piece for Racing Alternator Rotor
Puller 2-piece for Racing Alternator Rotor

2-piece puller for racing alternator rotorWhen pulling rotors with the two-piece puller: First, carefully remove the aluminum threaded washer (with nut head). With newer versions, removing the nut/threaded washer is not necessary, as sufficient thread is available. Engage the outer puller completely. Tighten the central puller bolt until the rotor is released. On some models, the bolt securing the rotor may need to be loosened so that the puller can press against it to release it.

Regular price: €59.00
Battery Isolator Switch 12 - 32 V 3 Positions
Battery Isolator Switch 12 - 32 V 3 Positions

Battery Disconnect Switch 12 - 32 V 3 positions Recommended for all motorcycles with racing alternator. Comfortable and secure battery disconnection. protect the battery when bike is not in use from discharge. Switch has 3 setting position, removeable in Off-Setting. Needed whole cut for installation 29mm12-36V100A max.

Regular price: €22.90
DIRKO HT BLACK Sealant ProfiPress 200ml 471.501
DIRKO HT BLACK Sealant ProfiPress 200ml 471.501

Sealing compound DIRKO HT BLACK ProfiPress 200ml 471.501 Very easy to dose and a perfect consistency. Resealable. Suitable for Don't buy anything cheap. Should always be with you. Nnow based on oxime (neutral cross-linked) - silicone Temperature range from -60°C to + 285 °C (on 24h to + 315°C) pasty, stable, permanently elastic when cross-linked not solvent based UV-resistant non-flammable pressure packaging with new closure technology (handy clip closure and 90° locking nozzle) Color: Black Content: 200ml max. sealing gap: 2.0mm electrically insulating no drying out MEKO-free Reliably seals surfaces, crevices and cracks even when moving. Can be used as a seal for aggregates, engine housings, gears, end caps, oil pans and various engine parts. Neutral cross-linked, also suitable for light alloy engines. Resistant to ozone, extreme weather conditions, cold and hot water, salt water, fats and mineral oils.

Regular price: €17.90
Voltmeter Display DC 8-16V
Voltmeter Display DC 8-16V

Voltmeter Display DC 8-16V Specifications: Display mode: LED digital Display color: Green Measurement Range: DC 8V - 16V Measurement accuracy: ±(0.2%) Dimension: 5.7 x 2.9 x 1cm / 2.2" x 1.1" x 0.4" Wire length: 90cm / 35.4" Waterproof, Dustproof, Shockproof. Simple connection, easy to use. Mini size with 3-digit LED Digital Display. Measures DC Voltage precisely from 8V to 16.0V. Widely used for cars, motorcycles, bikes, substation automation, distribution automation, test equipment, voltage regulator and so on. Displays "LLL" when the voltage is lower than measuring range; displays "HHH" when the voltage is higher than the measuring range. Installation: red to switsched 12V source black to mass

Regular price: €14.90
1m charging cable XT60 to 4mm banana plug AWG12
1m charging cable XT60 to 4mm banana plug AWG12

1m charging cable XT60with 4mm banana plug with AWG 12 silicone wiressuitable for LiFePo4 battery and HTRC 150 charger

Regular price: €14.90
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Spezifische Ersatzteile YAMAHA FZR400 RACING LIMA

SPARE magnet rotor Yamaha FZR400
SPARE magnet rotor Yamaha FZR400

Racing Lima ERSATZ MAGNET rotor YAMAHA FZR400

Regular price: €340.00
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PRODUKTE FZR400

Yamaha FZR400 Racing Alternator Kit 98-02
Yamaha FZR400 Racing Alternator Kit 98-02

Please select the appropriate model year for your model, as well as the suitable accessories for installation and successful operation!This is a complete, ready-to-install race alternator kit consisting of the rotor, stator, mounting plate and the dedicated regulator/rectifier. The kit is supplied pre-assembled with all necessary connectors.In short: the significantly lighter rotor with a much smaller radius results in drastically reduced gyroscopic forces acting on the crankshaft. The effect is immense: Easier direction changes, especially in quick chicane transitionsMuch faster engine-speed matching when downshifting under braking, resulting in:quicker downshiftsless chassis disturbance, improved rear-end stabilitymore time and confidence when turning inlater brakingImproved throttle response and faster accelerationA typical power gain is around 5–6 hp, although this varies slightly from engine to engine.The kit uses a compact 45 mm rotor weighing only 198 g. This not only reduces the effective rotating mass on the crankshaft—since the new rotor is 78% lighter than the OEM unit (198 g vs. 890 g)—but more importantly reduces gyroscopic forces thanks to the much smaller radius (45 mm vs. 120 mm). For comparison: at 14,000 rpm the OEM rotor reaches a tangential speed of approx. 320 km/h, while the race rotor spins at only about 120 km/h.The key performance advantage comes from the fact that a lighter rotor with a smaller radius is far easier to accelerate and decelerate.Most racing alternators also use a smaller rotor, but typically with far fewer windings. This results in low and inconsistent output, and they still rely on the OEM regulator—which is not designed to handle surplus power at racing rpm and converts it into damaging heat. Our alternator kits also feature a compact rotor, but we use high-efficiency, fine-gauge copper wire for the windings. This enables us to deliver strong and consistent power from lower speeds (approx. 4000 rpm).Another key benefit is the intelligent switching system inside our dedicated regulator/rectifier. Once the required voltage is reached, no additional electrical load is generated at the crankshaft. This keeps the regulator significantly cooler and far more reliable. For this reason, never use our race alternator kits with the OEM regulator. Insbesondere für die besonderen Ansprüche hinsichtlich notwendiger Kapazitätsreserven in Verbindung mit einer Racing Lichtmaschine empfehlen wir den Einsatz einer LiFePo4 Versorgungsbatterie mit mind. 7,5 Ah, besser 10Ah.  When using a racing alternator, we advise against the use of a lithium polymer battery. To remove the original flywheel, you will need a puller.Pullers and LiFePO4 batteries are available here in the shop.

Regular price: From €969.00
SPARE magnet rotor Yamaha FZR400
SPARE magnet rotor Yamaha FZR400

Racing Lima ERSATZ MAGNET rotor YAMAHA FZR400

Regular price: €340.00