What Is the Zero Resistance Throttle Tube?

The Zero Resistance Throttle is a U.S. patented dual-bearing throttle assembly engineered to eliminate friction, binding, and premature wear found in traditional throttle tubes.

Unlike plastic throttle tubes that rely on direct contact with the handlebar — creating drag over time — the ZRT throttle rides on precision bearings, delivering ultra-smooth, consistent throttle control for the life of your bike.

This is the Bark Buster–compatible version, featuring a Rulon® J bearing bar-end system designed to work seamlessly with traditional handguard setups.

How the U.S. Patented Dual Bearing System Works

At the core of the ZRT throttle is a U.S. patented dual radial ball bearing design:

• One sealed radial bearing inside the throttle housing, protected from dirt and debris

• One precision bearing at the bar end, mounted via a reverse-expansion collet system

When installed, the throttle tube bottoms against the bearing, not the handlebar. As the throttle is pushed or pulled, the bearing transfers load directly into the bar — not the tube.

The result:

• Zero bar-to-tube friction

• No throttle drag under load

• No wear to the handlebar or tube

• A solid, damage-resistant throttle end

This creates an ultra-smooth, positive throttle action that remains consistent ride after ride.

Why Traditional Throttle Tubes Fail

With conventional plastic throttle tubes, any rider input — pushing, pulling, or bracing against the throttle — creates friction. Over time, this friction:

• Wears the throttle tube

• Deteriorates the handlebar

• Increases drag and inconsistency

• Reduces throttle feel without the rider realizing it

We’ve already solved this problem in other controls — modern clutches are hydraulic for a reason. The ZRT throttle applies the same thinking to throttle control: remove friction entirely.

By isolating the throttle tube on bearings, friction is eliminated. Throttle effort is reduced. Control improves.

Bark Buster Compatibility — Now Better Than Ever

This version of the ZRT throttle is designed specifically for Bark Buster and traditional handguard systems.

With our latest design:

• No cutting

• No grinding

• No guesswork

The throttle tube features a precision-machined bar-end bearing that integrates cleanly with Bark Buster-style handguards, allowing proper clamping and alignment with zero modification.

The bar end uses a Rulon® J bearing interface, chosen for its:

• Exceptional wear resistance

• Low friction under load

• Long service life in dirty, high-impact environments

Built to Take Abuse

Yes — it’s tough. Tough as nails.

The ZRT throttle is CNC-machined from billet aluminum and tested in real off-road conditions by riders who don’t baby their equipment. Many of our test riders run exposed throttle ends with roost guards and need a throttle that won’t fail in a crash.

This design creates a solid throttle end that resists impact damage, making it ideal for aggressive off-road, enduro, and motocross use.

Maintenance-Free Performance

The Zero Resistance Throttle is virtually maintenance-free.

Occasionally:

1. Remove the throttle

2. Clean with contact cleaner

3. Lightly re-lubricate with a few drops of oil

That’s it.

Your throttle will be smooth as butter again — and stay that way.

Once You Ride It, You’ll Never Go Back

By eliminating friction you don’t see, the U.S. patented ZRT dual-bearing throttle delivers smoother control, reduced fatigue, and more consistent throttle response.

Riders report improved feel immediately — and once you experience it, going back to a standard throttle tube simply isn’t an option.