Can You Use Any Dildo with a Motorbunny? Myths and Facts About Attachment Compatibility

Quick Answer

No, you cannot use any dildo with a Motorbunny. The machine uses specific attachment systems—like Vac-U-Lock and the Grip—so only compatible dildos and strokers will fit securely. Always check the attachment type before buying.

Shopping for dildos to use with your Motorbunny can feel confusing. You'll see claims that any dildo works, or that you just need a simple adapter. But the truth is more specific: Motorbunny machines are designed around a few attachment systems, and knowing which one you have makes all the difference.

In this guide, we bust common myths about Motorbunny dildo compatibility. We'll explain how Vac-U-Lock and Grip attachments work, what to look for when buying dildos, and how to avoid wasting money on toys that won't fit.

Myth #1: Any Dildo Will Work with a Motorbunny

The reality is that Motorbunny machines use specific attachment systems. For example, the Motorbunny BUCK Thrusting Sex Machine comes with a Vac-U-Lock adapter, which means it's compatible with any Doc Johnson Vac-U-Lock dong or dildo. But a standard dildo without a Vac-U-Lock base won't attach securely.

Some attachments, like the Bunny Slope Silicone Attachment for BUCK, are designed specifically for the BUCK machine. Others, like The Grip for Motorbunny BUCK, are made to hold Doc Johnson Main Squeeze strokers. So, before buying a dildo, check whether it's designed for the Vac-U-Lock system or another compatible mount.

• Look for 'Vac-U-Lock compatible' or 'fits Motorbunny' in the product description.
• If a dildo has a smooth, flat base without a hole or locking mechanism, it likely won't fit securely.

Myth #2: Vac-U-Lock and Grip Are the Same Thing

Vac-U-Lock and Grip are two different attachment systems. Vac-U-Lock uses a hole in the base of the dildo that fits over a locking post. The Grip is a separate attachment that holds strokers—like Doc Johnson Main Squeeze—using a locking lever. They serve different purposes and are not interchangeable.

If you want to use a Vac-U-Lock dildo, you need the Vac-U-Lock adapter (included with the Motorbunny BUCK Vac-U-Lock Edition). If you want to use a stroker, you need The Grip. Trying to force a stroker onto a Vac-U-Lock post won't work, and vice versa.

• Decide which type of toy you prefer—dildo or stroker—and choose the corresponding attachment system.
• The Grip includes a pull-tab locking lever for one-step mounting, making it easy to switch between strokers.

Myth #3: You Can Use Any Vac-U-Lock Dildo with the BUCK

This is mostly true, but with a caveat. The Motorbunny BUCK Vac-U-Lock Edition includes a Vac-U-Lock adapter, which allows you to use any Doc Johnson Vac-U-Lock dong or dildo. However, some Vac-U-Lock attachments may not be compatible with the BUCK specifically—for example, the 7 Inch Thin ULTRASKYN Dong notes it's 'compatible with Motorbunny BUCK using Vac-U-Lock adapter, not compatible with...' (the description cuts off). So always check the product details for explicit BUCK compatibility.

Also, not all Vac-U-Lock attachments are the same size or shape. The 8-Inch ULTRASKYN Cock, for instance, is a larger, dual-density option, while the 7 Inch Thin Dong is slimmer. Both will attach, but the riding experience will differ. Choose based on your preferences for girth and length.

• Read the full product description to confirm BUCK compatibility, especially for attachments that mention specific machine models.
• Consider the size and shape of the dildo—not just the base—to ensure it meets your needs.

Myth #4: You Need a Special Adapter for Every Dildo

Not exactly. The Motorbunny BUCK Vac-U-Lock Edition already includes a Vac-U-Lock adapter, so you don't need to buy an extra one for Vac-U-Lock dildos. But if you want to use non-Vac-U-Lock toys, you'll need a different attachment—like The Grip for Main Squeeze strokers. There's no universal adapter that fits every dildo on the market.

So, instead of buying adapters for each toy, focus on buying toys that are designed for the attachment system you already have. This saves money and ensures a secure fit.

• Check what's included with your Motorbunny machine before buying additional adapters.
• If you want to use strokers, invest in The Grip rather than trying to find a generic adapter.

Compatibility Verdicts

• Any dildo works: False. Only dildos designed for the machine's attachment systems (like Vac-U-Lock) will fit securely. Check the base of the dildo for a Vac-U-Lock hole or other compatible mount.
• Vac-U-Lock vs Grip: Different systems. Vac-U-Lock uses a hole in the dildo base; Grip holds strokers with a locking lever. Choose based on the type of toy you want to use.
• All Vac-U-Lock dildos fit the BUCK: Mostly true, but always confirm BUCK compatibility in the product description, as some attachments may have limitations. Read the full description before buying.
• You need a special adapter for every dildo: No. The BUCK Vac-U-Lock Edition includes the adapter. For strokers, you'll need The Grip. Buy toys that match the attachment system you already have.

Compatible Products and What They Mean for You

• Motorbunny Buck - Thrusting Sex Machine (Doc Johnson Vac-u-lock Edition): The world’s first and only hybrid saddle vibrator and thrusting sex machine. This exclusive edition comes with 3 attachments, a vac-u-lock adaptor allowing you to use any Doc Johnson Vac-U-Lock dongs or dildos, as well as 2 Doc Johnson select favorites. If you buy this edition, you get the adapter and attachments you need to start using Vac-U-Lock dildos right away—no extra purchases required.
• Vac-U-Lock - 8-Inch ULTRASKYN Cock White: Made from Ultra Realistic ULTRASKYN material, with a look and feel like no other. Attach it to your Vac-U-Lock Harness and you'll think it's the real thing! phthalate-free, body-safe. Proudly made in America. Dual Density Design Feels Real, Soft Exterior and Firm Core. This dildo is designed for the Vac-U-Lock system, so it will fit securely on the BUCK with the included adapter. Its dual-density design offers a realistic feel that can enhance your ride.
• The Grip for Motorbunny BUCK - Fits Doc Johnson Main Squeeze Strokers: Designed to firmly support any Doc Johnson Main Squeeze stroker. Mounting the Grip in one easy step is simple thanks to a pull-tab locking lever. If you prefer strokers over dildos, The Grip is the attachment you need. It locks the stroker in place for hands-free use, expanding your toy options beyond Vac-U-Lock.

Understanding Motorbunny dildo compatibility doesn't have to be complicated. Stick to the attachment systems your machine supports—like Vac-U-Lock for dildos and The Grip for strokers—and always verify product compatibility before purchasing. This way, you'll get the most out of your Motorbunny and avoid the frustration of a toy that just won't fit.