Harley Stage Kits Explained: Cost, Benefits and More

Dive into the realm of horsepower and torque with “Harley Stage Kits Explained: Costs, Benefits and More”. As an experienced motorcycling enthusiast, you know that optimizing your Harley-Davidson with the right stage kit is no simple task. It’s not just about power, but also performance, efficiency, and reliability.

This comprehensive guide will debunk the nitty-gritty of Harley Stage 1 vs Stage 2 vs Stage 3, helping you pick the perfect match for your motorcycle needs. Whether you’re looking to understand cost implications, advantages, or attempting to compare stages, we’ve got you covered. Unleash your Harley’s true potential, keep reading!

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Table of Contents

Harley Stage 1 vs Stage 2 vs Stage 3 Overview

The term “stage” in motorcycle tuning is a legacy from the early days of the aftermarket industry. It’s used to describe the level of modifications applied to a bike, with each stage representing a different set of performance upgrades. In the context of Harley-Davidson, the stages usually refer to the Screamin’ Eagle Upgrade kits, which are comprehensive packages of OEM performance parts.

The three primary stages are Stage 1, Stage 2, and Stage 3. Each stage represents a different level of performance enhancement, with the modifications becoming more extensive as you go up the stages.

What Is Stage 1 On A Harley-Davidson

The first stage, known as Stage 1, represents the initial level of performance enhancement. It’s the most basic stage and is considered the foundation for all future stage upgrades.

Related article: Harley Stage 1 Upgrade Cost

harley davidson ECU tuner that's used on Stage 1 kits

Stage 1 Intake, Exhaust, and Tune Upgrades

A Stage 1 upgrade typically includes modifications to the intake, exhaust, and Electronic Control Module (ECM) remapping. This stage is designed to increase the engine’s intake and exhaust flow, thus increasing its power. The changes generally result in a 10-15% power increase over stock, which translates to improved throttle response and acceleration. However, it’s worth noting that some riders prefer an aftermarket tuner for their bike.

Read more: Harley 96 vs 103

What Is Stage 2 On A Harley-Davidson

Moving up to Stage 2, the modifications become more extensive. This stage is generally referred to as a performance cam upgrade, which is added to the existing Stage 1 components. However, it’s worth nothing that a stage 2 air cleaner is also recommended.

Related article to read next: Harley Stage 2 Upgrade Cost (Revealed)

example of the camshaft kit used for harley davidson's stage 2 upgrade

Stage 1 vs Stage 2 Camshaft

The main difference between Stage 1 and Stage 2 lies in the camshaft upgrade. The Stage 2 cam is designed to open the engine’s valves further and keep them open longer, allowing more air to enter the engine. This results in a significant increase in power, especially in the mid-to-upper RPM range. Typically, a Stage 2 upgrade can result in a 20-25% power increase over stock.

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What Is Stage 3 On A Harley-Davidson

Stage 3 represents an even higher level of performance enhancement. This stage generally involves a big bore upgrade and a cam upgrade.

example of the piston and cylinder kit used to make the stage 3 kit for harley davidson motorcycles

Stage 2 vs Stage 3 Camshaft

The cam used in Stage 3 is typically a high-performance cam that provides a longer valve opening duration and higher lift than the Stage 2 cam. This, along with the big bore upgrade, allows the engine to take in even more air and fuel, leading to an even greater increase in power. A Stage 3 upgrade can result in a power increase of anywhere from 30-40% over stock.

Related article: Harley Stage 3 Upgrade Cost

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What Upgrades Does Each Stage Involve

The specific modifications involved in each stage vary depending on the specific model of the bike and the exact kit used. However, in general, the stages can be summarized as follows:

Stage 1: This involves modifications to the intake, exhaust, and ECM remapping.
Stage 2: This involves a performance cam upgrade and adjustable pushrods.

Stage 3: This involves a big bore cylinder upgrade, matching pistons, and a high-performance cam upgrade.

How Much Does Each Stage Cost?

The cost of each stage varies depending on the specific components used and whether you choose to do the installation yourself or have it done by a professional. However, as a general guide:

Stage 1: The cost of a Stage 1 kit can range from $1,000 to $1,500.
Stage 2: A Stage 2 kit can cost between $450 and $550.
Stage 3: A Stage 3 kit can cost between $1,700 and $1,900.

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Can You Do These Upgrades Yourself?

Whether you can do these upgrades yourself largely depends on your mechanical skills and the complexity of the modifications. Stage 1 upgrades are typically the easiest to do and can often be done at home with basic tools. Stage 2 and 3 upgrades are more complex and may require more advanced mechanical skills or professional installation.

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Are There Stages Beyond Stage 3? (Stage 4 and Stage 5 Explanations)

harley stage kits infographic showing the difference between each stage up to stage four

Yes, there are stages beyond Stage 3. These stages, known as Stage 4 and Stage 5, involve even more extensive modifications and can result in significant power increases. However, they also require a high level of mechanical skill and can be quite expensive.

Are Stage Upgrades Worth It? How To Tell

Whether a stage upgrade is worth it depends on your specific needs and desires. If you’re looking for a significant increase in power and performance, and you’re willing to invest the time and money required, then a stage upgrade can definitely be worth it. However, it’s important to remember that as you go up in stages, the complexity and cost of the modifications increase, so it’s important to carefully consider your needs and budget before deciding on a stage upgrade.

Related article: Are Harleys Reliable?

Frequently Asked Questions

In this section, we’ll answer some commonly asked questions about Harley-Davidson stage upgrades.

What is the Screamin’ Eagle package?

The Screamin’ Eagle package refers to Harley-Davidson’s OEM performance parts package. These packages provide a significant performance boost without voiding the bike’s warranty.

What are the 4 stages for Harley-Davidson?

The four stages for Harley-Davidson are Stage 1 (intake, exhaust, and ECM remapping), Stage 2 (cam upgrade and adjustable pushrods), Stage 3 (big bore cylinders, matching pistons, and cam upgrade), and Stage 4 (Stage 3 plus upgraded heads, clutch components, throttle body, and lifters).

How much is a Screamin’ Eagle upgrade?

The cost of a Screamin’ Eagle upgrade depends on the specific stage. Stage 1 kits can cost between $1,000 and $1,500, Stage 2 kits can cost between $450 and $550, Stage 3 kits can cost between $1,700 and $1,900, and Stage 4 kits can cost between $2,200 and $3,800.

Is Screamin’ Eagle made by Harley?

Yes, Screamin’ Eagle Performance Stage Kits are manufactured by Harley-Davidson.

In conclusion, the Harley-Davidson stage upgrades offer a systematic approach to enhancing your bike’s performance. While each stage involves an increased level of complexity and cost, they also provide an increased level of power and performance, making them a worthwhile investment for many riders.

Looking for maximum performance? Check this out: ThunderMax Tuner Reviews: A Complete, In-Depth Analysis