Janus 450 Stock tuner unit

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Ships May / June 2026

 Reserve a unit from the first production batch now.

Janus 450 Stock Tune (Phoenix • Griffin • Halcyon)

Fix the Mid-Range. Make the Bike Feel Right.

If your Janus 450 feels like it has a dead spot, pulsing, or hesitation in the middle of the RPM range—you’re not imagining it.

That’s coming from the factory fueling.

What’s Going On (Simple Version)

We ran a stock Janus 450 on the dyno.

The engine is running too rich in the mid-range

• Around 4,000–6,000 RPM,
• the air/fuel ratio is about 11–12:1

In plain terms:

It’s getting more fuel than it needs.

How That Feels When You Ride

That extra fuel causes:

• A pulsing or surging feeling
• Sluggish throttle response
• A “flat” spot in the power
• Uneven acceleration

Right in the RPM range you use the most.

What This Tune Does

This plug-and-play tuner corrects that fueling.

You’ll Feel:

• Smoother power through the mid-range
• Better throttle response
• More consistent acceleration
• A bike that just feels “right”

Plug & Play — No Hassle

• Installs in under 5 minutes
• Plugs directly into your injector connector
• No permanent changes to the bike

Fitment

• Designed for stock Janus 450 bikes only
• (Phoenix, Griffin, Halcyon)
• Not for bikes with performance exhausts

FAQ (Straight Answers)

 Q: Will this hurt my engine?

No. This tune is designed to improve how the engine runs—not stress it.

Q: Is this hard to install?

No. If you can plug in a connector, you can install this. It takes about 5 minutes.

Q: Do I need to adjust anything after installing it?

No. It’s fully plug-and-play.

Q: Will this work with an aftermarket exhaust?

No. This version is for stock bikes only. A performance version is coming.

Q: What’s the biggest difference I’ll notice?

The mid-range smoothness. The bike will feel more responsive and consistent instead of pulsing or hesitating.

Bottom Line

The engine is solid.

The fueling just needs help.

This fixes it.