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Drivetrain› Clutches and Components

Harley-Davidson

Clutch Diaphragm Spring

$42.95 $34.95 Save $8.00

SKU: 37951-98

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

It replaces the stock diaphragm spring. This part fits 1999-2017 Twin Cam-equipped models and 1998-1999 Evolution 1340-equipped models.
Show original supplier description
The Harley-Davidson Heavy Duty Stock Clutch Spring (part number 37951-98) is engineered to assist in increasing the capacity of your stock clutch by replacing the original diaphragm spring. This heavy-duty clutch spring is compatible with 1999-2017 Twin Cam-equipped Harley-Davidson models and 1998-1999 Evolution 1340-equipped models. However, it is crucial to note specific exclusions to ensure proper fitment. This part will not fit the following models: 2016-2017 FXDLS, FLSS, FLSTFBS, and FXSE. It is also not compatible with 2013-2016 CVO Touring models that feature a hydraulic actuated clutch. Additionally, it is not compatible with 2015-2016 FLHTCUL and FLHTKL, or 2014-2016 Touring and Trike models already equipped with the Screamin' Eagle A&S Clutch Kit (P/N 37000026).

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

BrandHarley-Davidson
Part Number37951-98
CategoryDrivetrain
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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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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