6 Best Wide Band O2 Sensors and Controllers for Your Harley 110 CVO

I’ve spent more weekends than I’d like to admit with a laptop on my garage workbench and a tuner cable hanging off my CVO. If you ride a 110 and have changed the exhaust, air cleaner, or cams, you already know the stock fueling can leave power on the table. A wideband O2 sensor shows you what the engine is doing, so you can stop guessing.

The right wideband setup makes tuning faster and safer. The wrong one gives you drifting numbers and a lot of frustration. Below are the six I’d actually trust on a big-inch Twin Cam, plus what I’ve learned about installing them.

Why I Run a Wideband on My 110 CVO

The stock narrowband sensors in the headers only tell the ECM whether the mixture is slightly rich or slightly lean around 14.7:1. They can’t tell you if you’re at 12.8:1 under wide-open throttle or 15.5:1 on a part-throttle cruise. A wideband reads the whole range, which is what you need when you’re tuning.

That matters on a 110 because a lean condition makes heat fast. If you’ve ever noticed a bike running hotter than normal, the harley motorcycles overheating symptoms are worth a read. A lean mixture is one of the most common hidden contributors, and a wideband catches it before it hurts anything.

1. Innovate Motorsports LC-2 with Bosch LSU 4.9 — Best Overall Wideband Kit

The Innovate LC-2 is the one I keep coming back to. It’s a small, sealed controller that drives a genuine Bosch LSU 4.9 sensor and outputs both a 0-5V analog signal and serial data. Street pricing is usually around $200-$230 for the kit.

What I Like

The LC-2 is stable, and the free-air calibration is quick. I’ve logged runs with it into laptop software and compared them to dyno numbers, and it tracked closely. The 0-5V output also feeds many aftermarket tuners and data loggers.

It’s compact enough to tuck under the seat or inside a fairing cavity. Wiring is simple: power, ground, sensor, and output.

What to Watch

There’s no built-in display. You’ll need a gauge, a laptop, or a tuner to read it. That’s fine for tuning sessions, but it’s less handy if you want a number on the bars all the time.

2. AEM X-Series Wideband UEGO (30-0300) — Best Gauge-Style Option

If you want a readout you can see while riding, the AEM X-Series Wideband UEGO 30-0300 is a strong choice. It’s a self-contained gauge with an AFR display and a Bosch LSU 4.9 sensor, usually priced around $190-$230. It also has analog outputs for logging.

Why It Works on a Bagger

The gauge is small enough to mount in a pod or on a temporary tuning bracket. I like that you can watch the AFR in real time during a test ride. It makes it easy to spot a lean tip-in or a rich decel.

AEM’s controller has a reputation for good response time. It also has a built-in sensor health check, which I’ve found handy when I suspect a tired sensor.

Downsides

A car-style gauge isn’t pretty on a CVO’s dash. I treat it as a tuning tool, not a permanent accessory. You’ll also want to protect the wiring from vibration and heat.

3. Dynojet Wideband 2 (Power Vision 3 AutoTune) — Best for Tuner Integration

If you already use or plan to buy a Dynojet Power Vision 3, the Dynojet Wideband 2 is the cleanest way to feed it wideband data. It lets the tuner read AFR and use AutoTune to adjust the fuel table. The Wideband 2 is built around the same Bosch LSU 4.9 sensor.

My Experience

Wiring it into the tuner ecosystem is far simpler than building a custom solution. The tuning software is designed around it, and the support from Dynojet is excellent. Pricing varies by kit, so check what’s included (sensor, harness, bungs) before you buy.

AutoTune won’t replace a proper dyno session, but it gets you a very solid base map. I then fine-tune by hand on the road.

Things to Know

Your bike’s year and model matter here, so confirm compatibility with your specific CVO. It’s also pricier than a standalone controller. Still, I think it’s worth it if you want the tuner and wideband to talk to each other.

4. Bosch LSU 4.9 (Part 17025) — Best Replacement Sensor

The Bosch LSU 4.9 is the sensor inside most of the controllers on this list. Bosch sells it as part 17025 (check the connector style for your controller), typically around $70-$100. When your sensor is tired, this is what you replace it with.

Why Replacement Matters

Wideband sensors wear out, especially if you run rich or have oil getting into the exhaust. I’ve seen readings drift by half an AFR point or more on a worn sensor, which can lead to a bad tune. Swapping to a fresh LSU 4.9 often fixes it.

Speaking of oil, I’m picky about what goes in my crankcase, in part because it affects exhaust deposits. I covered my thinking in my guide to the best oil for a harley davidson motorcycle, and it’s worth a look if you want a longer-lived sensor.

Caveat

This is only a sensor. You still need a controller to run it. Make sure the connector and the calibration match your controller, because they aren’t all interchangeable.

5. 14Point7 Spartan 3 Lite — Best Compact Standalone Controller

The 14Point7 Spartan 3 Lite is a neat, small controller that pairs with a Bosch LSU 4.9. It’s usually priced around $150-$200. I like it for riders who want a clean install and don’t mind using a laptop or a gauge for the readout.

What Stands Out

It’s easy to set up and has a solid reputation for accuracy. The controller has a simple analog output and works well with common data loggers. It’s a good choice if you want to go lighter on the wallet than the Dynojet route.

Where It Falls Short

It isn’t a plug-and-play tuner solution for Harley’s ECM. You’ll need to handle your own logging or tuning workflow. That’s fine for experienced DIYers, but beginners might prefer a more guided system.

6. Innovate MTX-L Plus — Best Dedicated Dash Gauge

The Innovate MTX-L Plus is a larger, brighter gauge that includes the wideband controller and display in one unit. It generally runs around $230-$280. If you want a permanent AFR readout, this is the one I’d consider.

Why I Like It

The display is easy to read in daylight, and the unit has a configurable analog output. It’s a more robust package than a basic add-on gauge. The sensor is the same Bosch LSU 4.9 design I trust.

Trade-Offs

It’s bulky for a CVO cockpit. It also costs more than the LC-2, and you’re paying mainly for the built-in display. I’d choose it only if you really want that always-on readout.

How to Choose the Right Wideband Setup

Match It to Your Tuning Style

If you use a Power Vision 3, go Dynojet. If you log with a laptop, the Innovate LC-2 or Spartan 3 Lite is perfect. If you want a visible readout on the road, pick the AEM X-Series or Innovate MTX-L Plus.

Think About Sensor Placement

Placement affects accuracy more than most people think. I install the sensor in a weld-in M18x1.5 bung downstream of the collector, angled at least 10 degrees upward so condensation doesn’t pool on the element. Avoid placing it right at the head pipe flange.

Also keep it ahead of any slip-on junction that could draw in outside air. Leaks create false lean readings that lead to a bad tune.

Keep the Stock Sensors Alive

I don’t remove the factory narrowband sensors. The ECM still uses them for closed-loop fueling in part-throttle areas. I add a separate bung for the wideband so the stock system keeps working.

Installation Tips From My Garage

Start With a Healthy Engine

A wideband will only tell you the truth about a bike that’s in good shape. I always change the oil and filter first. If you need a refresher, see my picks for the best motorcycle oil filter for harley and my deeper dive on what is the best oil for a harley davidson motorcycle.

Do the Free-Air Calibration

Before you install the sensor, run the controller’s free-air calibration with the sensor in open air. It sets the baseline and is the single most common step people skip. A bad calibration gives a bad tune every time.

Protect the Wiring

Route the sensor cable away from the header and keep it from rubbing. I use heat sleeve and zip ties every few inches. Heat and vibration are what kill wideband harnesses on a V-twin.

Mind Your Exhaust Setup

Your exhaust has a big effect on where the wideband can go. If you ride in California or another strict state, check my notes on the best harley motorcycle exhaust for california riders. Compliance matters, and a tuned bike with a legal system is the best of both worlds.

Common Mistakes I See

The biggest one is trusting a wideband reading without checking for exhaust leaks. Even a tiny leak at a slip-on connection will make the bike appear lean. I always smoke-test or at least check every joint first.

Another is chasing a “perfect” AFR number. Targets vary by RPM, load, and cam. A good tune is about smooth, safe, repeatable fueling, not one magic number.

Finally, don’t ignore sensor age. If your readings are suddenly erratic, replace the sensor before you rewrite your fuel table.

My Final Pick

For most riders, I recommend the Innovate LC-2. It’s accurate, affordable, and flexible enough to work with almost any tuning workflow. If you’re already in the Dynojet ecosystem, the Dynojet Wideband 2 is the logical upgrade.

Whichever you pick, take your time with the install and the calibration. A good wideband setup on a 110 CVO pays for itself in smoother throttle response, cooler running, and peace of mind.

Frequently Asked Questions