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EBC CSK921 Diaphragm Clutch Spring Kit

(Harley Davidson XLH883 1986-90, XLH1200 1988-90, XLH883HUG Sportster 883 Hugger 1987-90, XLH1100 1986-87 + 11 more models)

Part of: EBC Heavy Duty Clutch Spring

Other options in this family: EBC CSK77 EBC CSK91 EBC CSK164 EBC CSK74 EBC CSK178

Manufacturer

Picture for manufacturer EBC

Part Number

CSK921
9 reviews
Sale Price

$38.12

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The EBC CSK921 Clutch Spring Kit is designed to prevent damage from prolonged exposure to heat and wear in diaphragm-type clutches. These upgraded springs are engineered to be 10 percent stiffer than OEM stock springs, providing enhanced performance and durability.

Key Features:

  • 10% stiffer than stock springs for improved clutch engagement
  • Diaphragm-type clutch application
  • Prevents spring degradation from heat and wear
  • Smoother and faster clutch engagement
  • Reduces effort required for speed shifting
  • Complete kit with all necessary springs

Performance Benefits:

The increased spring stiffness delivers smoother takeoffs and faster, more precise shifting under performance conditions. While the clutch lever will have a slightly firmer feel, the trade-off is significantly improved clutch response and reduced slippage during hard acceleration. Ideal for riders seeking OEM-plus performance and reliability.

Note: The firmer lever pull may cause hand fatigue in heavy stop-and-go traffic conditions.

Products specifications

Fits

Harley Davidson XLH883 1986-90, XLH1200 1988-90, XLH883HUG Sportster 883 Hugger 1987-90, XLH1100 1986-87, XLH883DLX Sportster 883 Deluxe 1986-90; Kawasaki KX450F 2019-21, KX450 2019-21, 2023-24; Harley-Davidson XLH1000 1984 + 7 more models

Great service, great price and super fast shipping. Overall an AAA+++ experience!

Muy bueno

Easy to order! Shipped promptly and was kept imformed on expected arrival date. No muss no fuss just good service! Thanks. Pete

Fast service

I probably just got lucky. I ordered a fuel filter for a sprinter. After I received and installed it I realized there are a couple different types. Thankfully TH Motorsports sent me the exact part I needed! That never happens to me.

Never received $4.99 shipping refund.

Ordering and delivery went very smoothly.

Quick service very nice including with discount

Yay

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