1. What is Gear Ratio?

The gear ratio is the ratio of the number of teeth between two meshing gears. In go-karts with jackshafts, the total ratio is calculated by multiplying the ratio from the engine to the jackshaft by the ratio from the jackshaft to the axle.

2. How Does the Calculator Work?

The calculator uses the gear ratio formula:

Where:

• Engine Sprocket — Number of teeth on engine sprocket
• Jack In — Number of teeth on jackshaft input sprocket
• Jack Out — Number of teeth on jackshaft output sprocket
• Axle — Number of teeth on axle sprocket

Explanation: The formula calculates how many times the engine must rotate to make the axle rotate once.

3. Importance of Gear Ratio Calculation

Details: Proper gear ratio is crucial for go-kart performance. Lower ratios provide more torque (better acceleration), while higher ratios provide higher top speed.

4. Using the Calculator

Tips: Enter the number of teeth for each sprocket. All values must be positive integers. The calculator will compute the total gear ratio including the jackshaft.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical go-kart gear ratio?
A: Most go-karts use ratios between 6:1 and 9:1, depending on track size and engine power.

Q2: How does jackshaft affect gear ratio?
A: Jackshaft allows for two-stage gearing, enabling finer adjustment of the final ratio without extremely large or small sprockets.

Q3: What's better - higher or lower ratio?
A: Lower ratios (like 6:1) give better acceleration but lower top speed. Higher ratios (like 9:1) give higher top speed but slower acceleration.

Q4: How do I choose sprocket sizes?
A: Start with manufacturer recommendations, then adjust based on track conditions and desired performance characteristics.

Q5: Can I use this for other vehicles?
A: This calculator is designed for go-karts with jackshafts, but the principle applies to any chain-driven vehicle with similar gearing.