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Engines and Components› Crankshafts and Components

Rotary Aviation

Mazda WEIGHT, COUNTER

$302.48 $164.95 Save $137.53

SKU: N3Y8-11-52X

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In Stock
Ships by Aug 31
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$100 Minimum Order
30 Days Return
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Overview

The Mazda WEIGHT, COUNTER is a genuine OEM replacement part for RX-7 models. This part is specifically designed for the 1986-1988 Series 4 FC3S 13B engines.
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The Mazda WEIGHT, COUNTER (part number N3Y8-11-52X) is a genuine OEM component designed to ensure proper balance for the eccentric shaft and flywheel assembly in specific Mazda RX-7 models. Constructed from durable aluminum, this counterweight is a direct replacement for the original part, ensuring a precise fit and function. This component is specifically engineered for the 1986-1988 Series 4 RX-7 FC3S equipped with the 13B rotary engine. It is compatible with both automatic and manual transmissions and is suitable for applications using lightweight flywheels. The package includes one genuine Mazda Japan counterweight and six flywheel bolts, guaranteeing authenticity and quality. For optimal performance and to maintain the integrity of your rotary engine, it is crucial to use genuine Mazda parts. This counterweight plays a vital role in the smooth operation and longevity of the 13B engine by counteracting rotational forces and vibrations.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandRotary Aviation
Part NumberN3Y8-11-52X
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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