Motorbunny Buck With Vac-U-Lock by Doc Johnson

The Motorbunny Buck With Vac-U-Lock by Doc Johnson is a saddle-mounted sex machine that combines powerful all-the-way-to-11 vibration with two independent thrusting motions. It uses the Vac-U-Lock system, letting you swap between hundreds of attachments from one base unit. Built for anyone seeking serious intensity and endless customisation without buying multiple machines.

What it is and how it's made

The Motorbunny Buck With Vac-U-Lock by Doc Johnson is a hybrid saddle machine engineered to deliver both vibration and thrusting motion in one unit. You straddle it or recline against the included wedge, then attach your chosen silicone piece using the Vac-U-Lock locking system. The base houses dual motors that power the vibration independently from the thrust mechanisms, giving you granular control over each sensation layer.

What sets this apart from standard sex machines is the Vac-U-Lock compatibility. Rather than being stuck with one fixed attachment, you can swap between hundreds of Doc Johnson attachments—each one transforms the machine into a different experience. The dual thrust options (standard straight motion or angled G-thrust) mean you can hit completely different angles and intensities without leaving your position.

What stands out

• All-the-way-to-11 vibration power: The intensity genuinely builds from whisper-quiet to overwhelming in seconds, giving you precise control over sensation without artificial limits.
• Two independent thrust motions: Toggle between straight up-and-down stimulation and forward-driving G-thrust, completely changing the angle and sensation profile mid-session.
• Vac-U-Lock attachment system: Hundreds of Doc Johnson attachments click into place instantly, meaning one machine becomes dozens of different experiences without repurchasing a base unit.
• Multiple control methods: Manual controls let you adjust on the fly, preprogrammed routines handle auto-play, and wireless Bluetooth control lets you hand over command or run it remotely.
• Adjustable positioning wedge: Shift from straddling to reclined angles, changing where you feel sensation and letting you target different areas with precision.

Dimensions and materials

• Base dimensions: Designed for stable straddling; the ABS plastic base provides a solid platform with the included positioning wedge for angle customisation.
• Attachment materials: All silicone pieces are body-safe silicone; the 7-inch thin dong and 7-inch realistic cock with balls suit varied preferences.
• Included attachments: Six pieces total—three classic Motorbunny silicone shapes, the thin 7-inch dong, the realistic 7-inch cock, and one Vac-U-Lock adapter for third-party attachments.
• Weight and portability: Sturdy enough for stability; the base stays grounded during thrusting without shifting or tipping.
• Power source: Electric mains-powered for continuous, unrestricted performance; no battery fade or charging downtime.
• Vac-U-Lock compatibility: Click-lock system accepts any Vac-U-Lock attachment from the Doc Johnson catalogue and many third-party makers.

Setting up a sex machine

Unpack the Motorbunny Buck and place it on a flat, stable surface—a bed works well, though a sturdy chair or padded bench gives you more angle options. Insert the positioning wedge beneath the base or behind it, depending on whether you want to straddle or recline. Select your attachment and press it firmly onto the Vac-U-Lock mount until it clicks; you'll feel and hear the connection lock in place.

Start by choosing manual control and setting both vibration and thrust to low. Straddle the machine or position yourself against the wedge, then gradually increase vibration intensity while leaving thrust low. Once you're familiar with the sensations, experiment with the G-thrust option to find the angle that works for your body. If you're using the wireless app or preprogrammed routines, familiarise yourself with manual control first so you understand how the machine behaves. Always apply plenty of water-based lubricant to the attachment before use, and take breaks to avoid overstimulation. Unlike stationary dance poles, this machine demands active positioning; shift your weight and angle to guide sensation rather than staying static.

Should you choose this one?

Care and storage

Clean all silicone attachments with warm water and mild soap immediately after use, or use a dedicated toy cleaner; allow them to dry completely before reattaching. Wipe the ABS plastic base and Vac-U-Lock mount with a damp cloth and dry thoroughly. Store in a cool, dry place away from direct sunlight to preserve silicone integrity. Keep the mains cable coiled loosely and the wedge with the base to avoid losing pieces. Check Vac-U-Lock connections regularly for any wear; if the seal weakens, clean the connection thoroughly or replace the adapter.

Background reading

Understanding how dual-motion machines work, how to position your body for optimal sensation, and what to expect during your first session helps you get the most from the Motorbunny Buck. Learn more about technique, safety, and getting started by reading Using Sex Machines, which covers preparation, positioning, and how to use preprogrammed routines effectively.

What to expect

The vibration on this machine is genuinely intense when you push it toward 11. Unlike machines that plateau, the Motorbunny Buck keeps building; many people find they use it at 60–70% intensity rather than maximum. First-timers often underestimate how much sensation two independent thrusting motions create when stacked together—combining high vibration with G-thrust can feel overwhelming until you've acclimated, so start conservatively and build up over several sessions.

The Vac-U-Lock system is genuinely seamless once you've done it twice. The attachment clicks in firmly and stays put during vigorous thrusting—there's no slipping or partial disconnects. The positioning wedge completely changes the experience; straddling feels different from reclining because gravity and angle shift where sensation concentrates. Most people find one or two preferred positions and stick with them, though experimenting early pays off.

Cleaning is straightforward—silicone attachments rinse clean easily and dry quickly. The mains-powered design means you never face the battery-fade problem where power gradually weakens. Most owners report the machine holds up reliably over years of regular use; motors don't wear out and Vac-U-Lock connections remain tight unless deliberately overtightened. The main maintenance task is checking the power cable for damage and ensuring silicone attachments are completely dry before storage.

Noise levels are moderate during low-to-mid vibration but rise noticeably at high intensity. If discretion matters, running it below 80% intensity keeps the sound manageable. The preprogrammed routines vary in intensity; some start gentle and build, while others maintain steady power, so you can match your mood without constantly tweaking manual controls.

How it compares

Why it earns its place

Find the Motorbunny Buck With Vac-U-Lock by Doc Johnson from Malechastity.com.au, where you can order it with discreet Australia-wide delivery. This machine combines genuinely powerful vibration, two independent thrust motions, and the ability to transform itself through Vac-U-Lock attachments into dozens of different experiences—all without buying multiple base units. If intensity, customisation, and hands-on or app-controlled command matter to you, this is the machine that delivers on all three fronts. Genuine Brands, Backed by Warranty.