SKU: 13947763061

Stator + Kokusan Flywheel + Regulator + Puller Kit (RMS900-103809)

Sale price$458.55 Regular price$509.50
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Oct 19 - Oct 24

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Stator + Kokusan Flywheel + Regulator + Puller Kit (RMS900-103809)RMSTATOR is specialized in designing and manufacturing innovative electrical and electronic components for Powersports vehicles like motorcycles, ATV, SxS, UTV, snowmobiles, and PWC. Through unrelenting quality control, we ensure that each component meets or exceeds the OEM specs. With over 25 product families, rest assured that you will find the part you need. Anyone who rides or repairs Aprilias motorcycles is probably familiar with the stator,

RMSTATOR is specialized in designing and manufacturing innovative electrical and electronic components for Powersports vehicles like motorcycles, ATV, SxS, UTV, snowmobiles, and PWC. Through unrelenting quality control, we ensure that each component meets or exceeds the OEM specs. With over 25 product families, rest assured that you will find the part you need.

Anyone who rides or repairs Aprilia’s motorcycles is probably familiar with the stator, flywheel, and sometimes voltage regulator issues common to these models. Most of these bikes will have had at least one stator fail in its lifetime. The main problem was extremely strong magnets were used on the original flywheels, creating a very high power stator output, which generated excessive heat. This usually resulted in burned up, or shorted stator winding, and often in a failed voltage regulator.

To prevent or correct the flywheel problems, our engineers at RMS Labs have come up with a complete reliable heavy-duty charging system replacement kit for your Aprilia. Upgrade today if you haven’t already!

  • Heavy-duty Kokusan brand recall-type OEM flywheel
  • Triple-tested heavy-duty stator
  • Voltage regulator rectifier
  • Crankcase cover gasket
  • Flywheel puller

With this kit, you will be able to upgrade your current failure-prone charging system with a heavy-duty version using the latest technologies

 

  • Kokusan upgrade/recall type flywheel Lower-strength magnets for correct stator output, low heat generation, and long-term reliability.
  • Built to OEM size Fits precisely in your ride: install it and forget it.
  • Improved epoxy Uses high-temperature epoxy that is stronger than OEM, eliminating the possibility of magnet detachment
  • High-grade steel capping Prevents harsh additives in motor oil from degrading the epoxy attaching the magnets. Though extremely unlikely, if a magnet did ever come loose, it would remain in the sleeve preventing contact with the stator.
  • Precise balancing Eliminates crankshaft vibrations for longer engine longevity.

Don't waste time with temporary solutions, and start fixing your ride like a pro!

Please note: There are two possible kits for RSV4 engine. This kit ONLY fits RSV4 engine numbers HIGHER than 3413 with Kokusan flywheels. Please compare our flywheel to your original.

If your RSV4 engine number is LOWER than 3413, your motor uses the Mitsubishi flywheel, and will need Stator Assembly 857201. See kit RMS900-104929

Please Note:

  1. All electrical components must be fitted by a qualified technician.
  2. Before fitting electrical components ensure the root cause of the original failure has been addressed.
  3. The absence of either of points 1 or 2 above, will void any warranty.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 13947763061

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4.2 ★★★★★
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Brittney Oliver
Charlottesville, US
★★★★★ 5
Great Quality
My son Loves this Jacket. He specifically asked for one for Christmas and this one met his every expectation. It is great quality. It is thick and warm without being too bulky. I sized up for him since he is a growing teenager and it still fits great and he will be able to wear it next winter too if he wants.
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Reviewed in the United States on February 20, 2026
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Ridwan Omar
Dallas, US
★★★★★ 4
Cotton as Stylish as Snow
So far, after only wearing it a handful of days, I have already fallen deeply in love with this jacket. With its quality fleece jean material and stylish look, it's arguably climbed at record speed to being my favorite winter jacket thus far. It won't exactly cut it for the days of extreme cold, but it's practically perfect for those high 30s to low 50s degree Fahrenheit weather! The cotton on the inside is both soft and warm, and the overall fit of it hits a perfect sweet spot of being weighty without feeling too hefty or dragging on the body. The pockets aren't the deepest in the world, but with four of them, they'll be more than able to carry an decently sized arsenal of your everyday items. It lays on nicely, and is able to be worn with an extra layer or two underneath, in case a bit of extra warmth is needed. The only caveat that I could give it, hence why I gave it 4 stars instead of 5, is that if you choose to dawn on clothes that are rather lint susceptible, this jacket will be a direct enemy to it. But that is where the criticisms start and end, and is why I wish there were a way to give a product a 4.5 stars review here on Amazon. Otherwise, this is a must buy for anyone looking for a winter jacket that packs a bit more visual finesse than a typical puffer jacket. If only I had the sense to buy a winter jean jacket such as this one sooner rather than later!
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Reviewed in the United States on February 21, 2026
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Monica Hastie
Lowell, US
★★★★★ 5
⭐️⭐️⭐️⭐️⭐️
Size: X-Large, Color: Black-grey Lined
Perfect fit. Color and quality were great! Awesome jacket for the money
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Reviewed in the United States on January 9, 2026
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Prajina
Charlottesville, US
★★★★★ 5
Absolutely loved this
First of all, I loved that it came in a nice transparent bag. And it is the perfect fit. The inside is lined sherpa fleece, which is really warm in freezing temperature. The outside is denim material. It's not stretchy but is soft from inside. The color I got is dark brown.
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Reviewed in the United States on December 30, 2025
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Indiana homestead
Omaha, US
★★★★★ 3
Runs small if you are wearing layers
Runs small
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Reviewed in the United States on January 21, 2026

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