✓ VERIFIED
Oct 14, 2019
Perfect for the money
S&S CYCLE
SKU: T14-619295
S&S Cycle Sidewinder .650" Valve Spring Kit - 1984-2004 Harley Sportster
$254.95
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About S&S Cycle
S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.
Unleash the full potential of your 1984-2004 Harley-Davidson Sportster with the S&S Cycle Sidewinder .650" valve spring kit. Engineered from high-strength Kobe alloy wire and nitrided for extreme durability, this kit is designed for high-RPM applications. It includes everything needed for a comprehensive valve spring upgrade.
Why riders pick this
- Kobe alloy wire with nitriding for extreme durability
- High-performance conical single-wire spring design
- Includes chromoly forged retainers and all hardware
- Supports high-RPM applications and increased valve lift
- Complete kit for 1984-2004 Harley Sportster
This S&S Cycle Sidewinder valve spring kit is a critical upgrade for any 1984-2004 Harley-Davidson Sportster owner looking to enhance their engine's performance and reliability, especially with aggressive cam profiles. The high-performance conical single-wire springs are crafted from Kobe alloy wire, micro shot peened, and nitrided for exceptional strength and fatigue resistance in high-RPM environments. This complete kit ensures your valve train can handle increased lift and RPM without compromise.
Robust Design for High-Performance V-Twins
- Kobe alloy wire construction with micro shot peening and nitriding
- High-performance conical single-wire spring design
- Includes chromoly forged retainers with CNC-machined 9-degree locks
- Complete kit with springs, keepers, top and bottom collars, and shims
- Designed for .650" spring height, compatible with stock and S&S Super Stock heads
Unlock Your Sportster's Potential
Upgrading your valve springs is a fundamental step when building a high-performance Sportster engine. This S&S Cycle Sidewinder kit provides the necessary valve train stability to support higher lift cams and increased engine speeds, preventing valve float and ensuring consistent power delivery. It's a comprehensive solution for riders who demand maximum output and reliability from their Harley-Davidson, whether for spirited street riding or track days.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 900-0050
- Weight: 1.35 lb
- Category: Engine Components / Valve Springs, Retainers
Common questions
Does this valve spring kit include all the necessary components for installation?
Yes, this S&S Cycle kit is comprehensive, including valve springs, chromoly forged retainers, keepers, top and bottom collars, and shims for a complete upgrade.
What type of wire are these valve springs made from?
These valve springs are engineered from high-strength Kobe alloy wire, which is then micro shot peened and nitrided for enhanced durability and performance in high-RPM applications.
Is this valve spring kit compatible with all Harley-Davidson Sportster models?
This kit is designed to fit 1984-2004 Harley-Davidson Sportster models. It is also compatible with Twin Cam 88 Big Twins using stock heads (7mm and 5/16" valve stems) and all S&S Super Stock heads (5/16" valve stems). Always confirm fitment with Shop by Bike.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | S&S Cycle |
| TYPE | Valve Springs, Retainers |
| SKU | T14-619295 |
| WEIGHT | 1.35 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
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✓ VERIFIED
Sep 5, 2019
work great on 1992 XL
✓ VERIFIED
Sep 11, 2014
fit great, fast shipping
