What does '+0.001 inch oversize' mean for this crankpin?

This crankpin is manufactured to be 0.001 inches larger than the standard size. This is typically used when the crankpin bore in the crankshaft has been machined to match, ensuring a very tight and precise fit for optimal engine performance and durability.

What is the benefit of a tapered crankpin?

A tapered crankpin, like this one, helps to center and seat itself firmly within the crankshaft bore. This design contributes to a more stable and secure connection, which is important for the high-stress environment inside an engine.

Does this crankpin come with any installation hardware?

This product listing is for the S&S Cycle 34-2103 tapered crankpin only. Installation hardware, if required, is typically sold separately. Always refer to the manufacturer's installation instructions for a complete list of necessary components.

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Trusted Since 1957

Est. 1957

S&S Cycle 81-99 BT 1.250in Tapered Crankpin

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Specifications

Brand: S&S Cycle
Part #: 34-2103
UPC: 34-2103

S&S Cycle 81-99 BT 1.250in Tapered Crankpin

Name: S&S Cycle 81-99 BT 1.250in Tapered Crankpin
Brand: S&S Cycle
Price: 165.67 USD
Availability: InStock

$165.67

On Backorder — Expected to ship by May 7, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

S&S Cycle 81-99 BT 1.250in Tapered Crankpin for engine rebuilds.

Key Features

Fits 1981-1999 Harley-Davidson Big Twin and S&S 96, 107, and 113 V-series engines.
Tapered crankpin design for precise fitment.
Oversize +0.001 inch for a snug fit in machined bores.
Replaces OEM part number 23974-87.
Well-built component from S&S Cycle.

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Will this fit your vehicle?

Product Details

If you're rebuilding the crankshaft on your 1981-1999 Harley-Davidson Big Twin or an S&S 96, 107, or 113 V-series engine, this tapered crankpin is a solid option. It's designed to replace the OEM part number 23974-87 and is built to the specific dimensions needed for these engines.

This particular crankpin is an oversize +0.001 inch, meaning it's a touch larger than the standard size. This is often used when machining the crankpin bore to ensure a tight, precise fit, which is critical for the smooth operation and longevity of your engine's rotating assembly. S&S Cycle is well-known for their engine components, and this part reflects their focus on building reliable parts for performance applications.

This crankpin fits a wide range of Harley-Davidson models from 1981 through 1999, including popular bikes like the Electra Glide Classic, Heritage Softail, Dyna Super Glide, and Softail Standard. Make sure to verify fitment for your specific model and year.