Alternator Rotor / Clutch Shell & Sprocket Assembly
OEM style replacement alternator rotor/clutch shell with primary chain sprocket combo. Incl. ball bearing. Magnets are encapsulated in a stainless steel shell. This will help prevent magnets coming loose; which fequently happens with OEM equipment. OEM replacement reference 36791-84. Note: Replacement clutch hub ball bearing is separately available as 556626/36799-84. TECH TIP: On L84-90 XL Sportster the alternator is installed on the clutch hub. This was poor design. Excessive clearance between clutch hub bearing; mainshaft ball bearing and needle bearing between the two parts of the transmission shaft allows the clutch hub to cock sideways; enough for contact between stator and clutch hub. Grinding stator and/or clutch hub is sometimes done; but not recommended by MCS; to add clearance which reduces output. Better is installing new bearings. From 1991-on the alternator was moved and the rotor is run on the sprocket shaft. This fixed the problem.
The estimated dispatch time is displayed on each product page and depends on the product’s stock location:
- In stock: dispatch within 1–3 business days
- European stock: dispatch within 2–3 business days
- USA stock: estimated dispatch within 3–5 weeks
- Products with a specific lead time: estimated dispatch according to the timeframe displayed on the product page
Once your order has been dispatched, you will receive a confirmation email with tracking information.
Estimated carrier transit times are:
- France: 1–5 business days
- Most European destinations: 5–10 business days
- Countries outside the European Union: delivery times may vary depending on the destination and customs clearance
The dispatch estimate and carrier transit time are separate.
Compatibility
You can verify compatibility in two ways:
- Use the vehicle selector on the product page to check whether the part matches your motorcycle.
- Review the fitment table for the full list of compatible models and years.
Some parts may require additional components, modifications or a specific existing setup. Always read the fitment notes and product description before ordering.
Still unsure? Contact us with:
- motorcycle make and model;
- model year;
- exact version or trim;
- current modifications;
- product reference or link.
Our team will help you confirm compatibility before ordering.
Eligible items may be returned within 30 days of delivery.
To be accepted, the item must be:
- unused and uninstalled;
- in its original condition;
- returned with its original packaging, labels and accessories.
Parts that have been installed, damaged or modified cannot be returned.
Please contact us before sending an item back. Returns sent without prior authorization may not be accepted.
Return shipping costs remain the customer’s responsibility unless the item received is incorrect, damaged or defective.
Customs Duties & Taxes
European Union
Orders delivered within the European Union are shipped from France. No import duties are charged upon delivery.
Countries outside the European Union
Local VAT, customs duties and carrier clearance fees may apply. These charges are determined by the destination country and remain the customer’s responsibility.
Payment Options
We accept major credit and debit cards, PayPal and the installment payment methods displayed at checkout.
Eligible orders may be paid in 3 or 4 installments, subject to the payment provider’s approval and applicable limits.

