How Fast Is a Honda Trail 70? Top Speed Explained

The Honda Trail 70 (CT70) typically tops out around 40 mph (64 km/h) in stock, well-tuned condition. Most 3‑speed semi‑automatic models run about 38–40 mph, while the 4‑speed CT70H can reach roughly 42–45 mph under ideal conditions. Actual results vary with rider weight, elevation, mechanical condition, and gearing. Below, we unpack how model differences and real‑world factors influence what you’ll see on the road.

What We’re Talking About: The Honda “Trail 70” Family

Sold in the U.S. primarily as the Trail 70, Honda’s CT70 minibike was produced in several waves (notably 1969–1982 and 1991–1994). It used a 72 cc air‑cooled, four‑stroke single with either a 3‑speed semi‑automatic transmission or, in the CT70H variant, a 4‑speed manual clutch. Outside the U.S., similar models carried ST70/Dax badging. Because power output, emissions equipment, and gearing differed by year and variant, “top speed” isn’t a single number—but a range.

Typical Top-Speed Ranges by Model

The figures below reflect common real‑world results for stock bikes in good tune, on level ground, with an average‑weight rider and no significant headwind. They synthesize period specifications and owner testing.

• CT70 (early 3‑speed semi‑auto, e.g., K0–K1, circa 1969–1971): typically 38–40 mph (61–64 km/h)
• CT70 (later 3‑speed semi‑auto, 1972–1982): typically 37–40 mph (60–64 km/h)
• CT70H (4‑speed manual, early 1970s): typically 42–45 mph (68–72 km/h)
• CT70 reissue (1991–1994, 3‑speed semi‑auto): typically 34–38 mph (55–61 km/h)
• ST70/Dax (overseas counterparts, stock trim): broadly similar to the above ranges depending on tune and gearing

While some speedometers may suggest slightly higher figures, CT70 instrumentation is often optimistic by several mph. GPS checks usually align with the ranges above.

What Affects a CT70’s Top Speed

Even among identical models, on‑road top speed is sensitive to setup and conditions. The factors below explain why two Trail 70s can post different numbers on the same road.

• Mechanical condition: valve adjustment, carb tuning, ignition timing, compression, and exhaust condition
• Gearing: front/rear sprocket tooth counts materially change top speed versus acceleration
• Rider and load: total weight and riding posture (aero drag) make a noticeable difference
• Environment: elevation, temperature, humidity, wind, and road grade
• Tires: correct size, pressure, and rolling resistance
• Instrumentation: stock speedos often read 5–10% high; GPS tends to be more reliable

Because the 72 cc engine’s power curve peaks modestly, small changes in drag or tune can shift the top‑speed figure by several mph.

Verifying and Safely Reaching Top Speed

If you want to confirm your Trail 70’s capability, a controlled, methodical approach will give the most reliable—and safest—result.

1. Ensure maintenance is current: valve lash, spark plug, air filter, fuel system, chain condition, tire pressures.
2. Warm the engine fully, then test on a flat, low‑traffic road in calm weather.
3. Make two runs in opposite directions to cancel wind/grade effects; use GPS to record speed.
4. Check gearing: note sprocket sizes; very short gearing can cap speed even with ample power.
5. Respect the machine’s limits: drum brakes, small wheels, and vintage components warrant conservative margins.

Following these steps will yield a realistic top‑speed number and keep stress on a vintage minibike to a minimum.

Summary

In stock condition, a Honda Trail 70 (CT70) generally runs about 40 mph, with 3‑speed models clustering around 38–40 mph and the 4‑speed CT70H reaching roughly 42–45 mph when everything is in its favor. Variations in tune, gearing, rider weight, and conditions explain most outliers. For an accurate reading, verify with GPS over two‑way runs on level ground and keep safety—and the bike’s age—in mind.

How fast does a 70 cc Honda go?

Average Top Speed of a 70cc Dirt Bike
Different models offer differing top speeds; for instance, one of the more popular 70cc bikes out there, the Honda CRF70F, can reach roughly 30mph. Conversely, other brands like SSR or TaoTao might push closer to 35-40 mph speeds.

How much is a 1970 Honda CT70 worth today?

Typically, you can expect to pay around $4,000 for a 1970 Honda CT70 H K0 in good condition with average spec. What is the highest selling price of a 1970 Honda CT70 H K0? The highest selling price of a 1970 Honda CT70 H K0 at auction over the last three years was $29,158.

What is the top speed of the Honda XR70?

The top speed for a Honda XR70 can vary, but for an XR70R, it’s around 50 mph. Other 70cc dirt bikes can reach speeds in the range of 30-40 mph, depending on the model and brand. 
Here’s a breakdown of factors influencing the top speed:

• Model: The XR70 was a play bike, and the CRf70F, a popular 70cc dirt bike, reaches around 30 mph, while other brands like SSR or TaoTao can go 35-40 mph. 
• Rider Weight: Larger riders will experience lower top speeds than lighter riders. 
• Terrain: The speed will be affected by the terrain the bike is ridden on. 
• Engine: The XR70 features a 70cc, 4-stroke engine with an automatic clutch. 

How fast does a Honda Trail 70 go?

A stock Honda CT70 Trail 70 typically has a top speed of around 47 mph. This is due to its 72cc 4-stroke engine producing around 6 horsepower. Some owners modify their CT70s, such as by upgrading to larger engines like a 140cc, which can increase the top speed to 55-65 mph or even higher, depending on the modifications. 
This video shows a top speed test of a modified CT70 with a 140cc engine: 24sSoutheast Vintage Cycle RescueYouTube · Mar 22, 2024