Ridernip
STATOR + KOKUSAN FLYWHEEL + REG + PULLER KIT (RMS900-103809), image 1

Rmstator

STATOR + KOKUSAN FLYWHEEL + REG + PULLER KIT (RMS900-103809)

StatorsSKU RMS900103809

Cheapest we found

$822.95

at XPERT Moto Gear

$822.95 lowest$879.99 highest

6 recent in-stock prices · spread $57.04 (7%)

Based only on in-stock prices checked in the last 30 days. 7 stores checked; dates for every store are shown below.

Recorded store prices

Prices we recorded when we last checked each store for this exact variant.

Product details

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.

Price history

Recorded changes for this exact variant.

Step chart of dated store-price observations. Solid lines show confirmed crawl coverage, dashed lines show overdue missed-check spans, and every line stops at the last confirmed price.

  1. 1XPERT Moto Gear9 points · last checked 22 Aug 2026
  2. 2MotoHeaven7 points · last checked 21 Aug 2026
  3. 3Adventure On Store3 points · last checked 22 Aug 2026
  4. 4Coffs Motorsports1 point · last checked 22 Aug 2026
  5. 5Gold Coast Dirt Bike Performance1 point · last checked 22 Aug 2026
  6. 6Shark Leathers5 points · last checked 22 Aug 2026

1 more store series is not shown to keep the chart readable.

Solid steps show periods confirmed by the store’s change-only price history and completed crawl record: if the price had changed at a check, another point would appear. Dashed steps show overdue periods with no completed crawl confirmation. Every line stops at that listing’s last confirmed check and is never extended to today. Prices are not live and may have changed since the last point shown.

How we collect and compare prices
Cheapest we found: $822.95 · XPERT Moto GearJump to comparison