How to Use a Strap-On Harness with the Motorbunny Buck: A Step-by-Step Setup Guide

Quick answer

To use a strap-on harness with the Motorbunny Buck, you need a compatible attachment that fits the Buck’s mounting system, such as a Vac-U-Lock dildo or a silicone attachment like the “Sweet Spot.” Secure the attachment, then strap the harness around your waist or hips so the dildo aligns with your body. Start with the machine off, adjust positioning, and always test the setup before turning on the vibration and thrusting.

Using a strap-on harness with your Motorbunny Buck opens up a world of hands-free possibilities, whether you’re riding solo or with a partner. The Buck’s powerful vibration and thrusting mechanics can be directed exactly where you need them when you secure a harness properly. This guide walks you through the setup step by step, so you can enjoy a stable, comfortable, and thrilling ride.

While the Motorbunny Buck is designed to be versatile, not every harness and attachment combination works perfectly. You’ll need to consider the attachment type, how it mounts to the machine, and how the harness fits your body. By the end of this guide, you’ll know exactly what to check and how to avoid the most common mistakes that lead to slipping or discomfort.

Choosing the Right Attachment for Your Strap-On Setup

The first step is selecting an attachment that can work with a harness. The Motorbunny Buck uses a mounting system that accepts both proprietary silicone attachments and Vac-U-Lock compatible dildos. For a strap-on setup, you’ll typically want a dildo with a Vac-U-Lock hole at the base, because it can be securely attached to a harness that has a corresponding O-ring or mounting plate.

If you prefer a non-phallic option, you can use a flat attachment like the Motorbunny Buck "Mt. Gushmore" Flat attachment. This silicone attachment features a non-penetrative sloped design with cascading ridges, making it ideal for grinding without penetration. However, if you want to use a strap-on harness with a dildo, you’ll need to ensure the dildo has a Vac-U-Lock compatible base, such as the Merci The Perfect Cock 10.5 in. Dildo with Removable Vac-U-Lock Suction Cup.

• Check if your harness has a removable O-ring that can accommodate the dildo’s base diameter.
• For Vac-U-Lock dildos, make sure the hole is clean and free of debris before attaching.

Securing the Attachment to the Motorbunny Buck

Once you have your attachment, you need to mount it securely to the Buck. The Motorbunny Buck uses a unique locking mechanism that holds the attachment in place. If you’re using a Vac-U-Lock dildo, you may need a Vac-U-Lock adapter that fits the Buck’s mounting post. Insert the dildo’s base firmly onto the adapter until you feel it click into place. For silicone attachments like the "Sweet Spot" for Motorbunny BUCK, simply press the attachment onto the machine’s mounting post – it’s designed to fit snugly.

A common mistake is not pressing the attachment all the way down, leaving a gap that can cause wobbling during use. Always double-check that the attachment is flush with the mounting base. If you’re using a Flat attachment like the "Mt. Gushmore," ensure the sloped side is facing the direction you prefer for grinding. The attachment’s ridges offer varied stimulation, so positioning matters for comfort.

• Always attach the harness before turning on the machine to avoid accidents.

Putting on the Harness: Positioning and Adjustments

With the attachment secured to the Buck, you can now put on the harness. The harness should be snug but not too tight. Position the O-ring or mounting plate over the attachment so the dildo or vibrator protrudes through. Then, fasten the straps around your waist or hips, adjusting the fit so the attachment aligns with your body. This alignment is critical: if the harness is too high or low, the stimulation will be off-target.

A common mistake is wearing the harness too loosely, which allows the attachment to shift during thrusting. Tighten the straps until the harness feels secure but allows you to move comfortably. If you’re using a harness with a removable O-ring, make sure the O-ring is the correct size for the attachment’s base – too large and it will slide, too small and it won’t fit.

• Practice sitting on the machine without turning it on to test alignment.

Mounting the Motorbunny Buck and Starting Slow

Now you’re ready to mount the Buck. Position yourself over the machine and slowly lower yourself so the attachment is in the desired spot. Keep your hands on the handlebars or the machine’s body for balance. Once you’re seated comfortably, turn on the vibration and thrusting at the lowest possible setting to ensure everything feels right. Gradually increase the intensity as you become accustomed to the sensation.

A common mistake is starting at a high intensity, which can overwhelm or cause the harness to shift. Always start low and ramp up. If you feel any discomfort, stop and adjust the harness or the attachment. It’s also important to ensure that the harness doesn’t interfere with the machine’s moving parts. Keep the straps clear of the thrusting mechanism to avoid snagging.

• Use a towel or mat under the machine to stabilize it on hard floors.

Step-by-Step Setup Checklist

1. Select a compatible attachment: Choose a Vac-U-Lock dildo or a silicone attachment like the "Sweet Spot" that fits the Buck's mounting system. Ensure the base is compatible with your harness's O-ring. Checkpoint: The attachment should fit snugly on the machine and through the harness without gaps.
2. Mount the attachment to the Buck: Press the attachment firmly onto the Buck's mounting post until you hear or feel a click. For Vac-U-Lock dildos, use an adapter if needed. Checkpoint: Test the attachment by gently pulling it – it should not move.
3. Put on the harness and position it: Slip the harness over the attachment and secure it around your waist or hips. Adjust the straps so the attachment aligns with your body. Checkpoint: Sit on the machine off to ensure the alignment feels right.
4. Start with low intensity: Turn on the Buck at the lowest setting and gradually increase the speed and thrust. Stop if you feel any pain or if the harness shifts. Checkpoint: The harness should remain secure throughout the ride.
5. Clean and store after use: Remove the harness and attachment, then clean them according to the manufacturer's instructions. Store them separately to avoid damage. Checkpoint: Regular cleaning extends the life of your equipment.

Compatible Attachments for Your Strap-On Setup

• "Sweet Spot" for Motorbunny BUCK: Made of premium, 100% silicone, the "Sweet Spot" BUCK attachment pairs best with the "G-Thrust" motion toggle (not included), and is designed for maximum G-Spot stimulation! This durable attachment is the same as the "Sweet Spot" attachment included in the Motorbunny BUCK box. It is not compatible with Motorbunny Original or Sybian. If you prefer a penetrative attachment that's designed for G-spot stimulation, this is a solid choice. Its silicone material is easy to clean, and it's specifically shaped to pair with the Buck's thrusting motion, making it ideal for a harness setup where you want the dildo to move with you.



• Motorbunny Buck "Mt. Gushmore" Flat attachment: This premium silicone attachment offers a non-penetrative sloped design to maximize vibration when grinding. Cascading ridges offer a variety of clitoral stimulation points 100% non-porous silicone for easy sterilization Mt. Gushmore Peaks 7 cm Above Base Returns for attachments not accepted Only compatible with Motorbunny Buck Not compatible with Motorbunny Original. For a harness setup that focuses on grinding rather than penetration, this flat attachment provides versatile clitoral stimulation without needing a dildo. Its non-porous silicone is easy to sterilize, and the sloped design is perfect for rubbing against a partner or the rider.

Using a strap-on harness with your Motorbunny Buck can transform your sessions into a more immersive, hands-free experience. By choosing the right attachment, securing it properly, and adjusting the harness for a snug fit, you'll avoid common pitfalls and enjoy a stable ride. Start slow, communicate with your partner if applicable, and always prioritize comfort and safety. With these steps, you're ready to take your Buck to new heights.