In stock form, a 2019 Honda Grom generally tops out around 60 mph (about 96 km/h). Real-world speeds vary with rider weight, wind, altitude, and the bike’s condition.
The 2019 Grom is a compact, lightweight motorcycle designed for agile city riding rather than long highway sprints. This article outlines the typical top speeds you can expect, the factors that influence those speeds, and how common modifications might change the number—while keeping safety and legality in mind.
Stock performance: what the numbers look like
Typical top speed in stock form
Most riders report top speeds in the high 50s to low 60s mph (roughly 95–100 km/h) under normal conditions with a rider of average weight.
- Rider weight and aerodynamics have a big impact on top speed.
- Engine condition, fuel quality, and maintenance affect peak RPM and power delivery.
- Wind, temperature, and altitude can push top speed up or down.
- Tire type and inflation influence rolling resistance and stability at high speed.
Conclusion: In stock form, expect roughly 58–63 mph (93–101 km/h) in typical conditions; leaning toward the upper end is common for a light, well-tuned bike.
Modifications and gearing: how to tailor top speed
What you can adjust
Gearing and selective performance upgrades can change the top-end. Remember that changes may affect reliability, warranty, and legality.
- Final-drive gearing: Taller gearing (for example, adjustments that effectively increase wheel RPM for a given engine RPM) can raise top speed but often reduces acceleration and increases wear on the drive components.
- Intake and exhaust improvements: Free-flowing intake and exhaust can yield small horsepower gains, which may translate to a slight bump in top speed under ideal conditions.
- Weight reduction: Reducing curb weight or carrying less payload can improve acceleration and may help reach a higher top speed for a given engine state.
- Maintenance and tuning: Ensuring the fuel system and ignition are properly tuned helps the engine reach its potential more consistently.
Conclusion: Modifications can add a few miles per hour at best; the Grom’s engine is small, so substantial increases are unlikely. Always verify that any changes comply with local laws and do not compromise safety.
Speed, safety, and legal considerations
The Grom excels as an urban-friendly, nimble motorcycle rather than a high-speed highway bike. Exceeding posted speed limits or riding aggressively can be dangerous. Wear proper protective gear, ride within your skill level, and ensure any modifications are legal in your area and do not jeopardize safety.
Summary
The 2019 Honda Grom typically reaches around 58–63 mph (93–101 km/h) in stock form, with occasional higher readings under favorable conditions. Modifications can shift top speed modestly, but gains are limited by the bike’s small displacement and overall design. For most riders, the Grom’s speed is well-suited to urban fun and occasional short highway bursts, provided safety and legal guidelines are followed.