RAM® Base H-Bar Combination Base (RAM-B-309-7) by RAM Mounts

Your phone, GPS or gear belongs where you can use it safely, not bouncing around in a pocket or a cubby. The RAM® Base H-Bar Combination Base (part number RAM-B-309-7) is a base that replaces the screws on a motorcycle brake or clutch reservoir cover and adds a 1" B-size ball, with no bar clamping required. Built by RAM Mounts, the brand trusted by riders and off-roaders, first responders, pilots and anglers, it is engineered to hold tight on rough roads and rougher trails.

At Witchdoctors we stock genuine RAM Mounts parts with the same part numbers RAM uses, so you can build a new setup, replace a worn piece or expand the system you already own with confidence.

Why Choose the RAM® Base H-Bar Combination Base

Reservoir bases free up handlebar space and put your phone or GPS right where you glance naturally. They use the existing reservoir cover screws, so there is nothing to clamp and nothing to slide around.

It uses a combination brake/clutch reservoir and handlebar base (handlebar clamp range about 0.5" to 1.25").

Key Features and Benefits

• Base: combination brake/clutch reservoir and handlebar base (handlebar clamp range about 0.5" to 1.25")
• Mounts to the brake or clutch reservoir cover using the cover’s screws
• Leaves handlebar space free for controls and accessories
• 1" B-size rubber ball for RAM arms and holders
• Compact, clean look on cruisers, touring and sport bikes
• Ideal for bikes with crowded bars

Specifications

• Brand: RAM Mounts
• Part number: RAM-B-309-7
• Product type: brake / clutch reservoir base
• Ball size: B size (1" diameter rubber ball)
• Base: combination brake/clutch reservoir and handlebar base (handlebar clamp range about 0.5" to 1.25")
• Warranty: RAM limited lifetime warranty on the mount and components (devices are not covered)
• Origin: listed as Made in the USA

From the Manufacturer

• Hardware: Standard or metric thread stainless steel bolts, provided in the kit. The zinc coated metal u-bolt accommodates rails in diameter from 0.50" to 1.25" in diameter

How the RAM Ball-and-Socket System Works

Every RAM mount is built from three interchangeable parts: a base that attaches to your vehicle, a double socket arm, and a holder or accessory for your device. Each base and holder ends in a rubber ball, and the arm’s sockets clamp around those balls when you turn the center knob. The rubber gives the joint grip, lets you set almost any angle, and helps soak up shock and vibration.

Parts only connect within the same ball size, so it pays to know the system:

• A size: 0.75" ball for lightweight devices
• B size: 1" ball, the most popular size for phones, GPS units, cameras and cup holders
• C size: 1.5" ball for tablets and heavier equipment
• D size: 2.25" ball for laptops and heavy-duty loads

This part uses the B-size 1" ball, so it works with all RAM B-size bases, arms and holders.

Materials and Build Quality

RAM builds its mounts from high-strength composite, powder-coated marine-grade aluminum and stainless steel hardware, depending on the part. Composite parts (usually marked with a RAP prefix) are light, strong and rust-proof. Aluminum parts are powder-coated to resist corrosion. Stainless hardware won’t rust in rain, mud, road salt or salt spray, so the mount keeps working season after season.

Fitment and Compatibility

The RAM® Base H-Bar Combination Base is a universal-fit RAM part. It isn’t tied to a model year. Fit depends on the mounting point, such as bar or tube diameter, reservoir screw spacing, thread size or surface type, and for holders on the size of your device.

• Motorcycles, including cruisers, baggers, touring, sport and adventure bikes, with Indian and Victory motorcycles specifically tagged for fit on our site
• ATVs, UTVs and side-by-sides from Arctic Cat, Can Am, CFMOTO, Honda, John Deere, Kawasaki, Polaris, Yamaha
• Boats, trucks, tractors, mowers and equipment wherever the base can attach

Model years: all years, provided the mounting point matches the specifications above. Not sure of your bar size? Use our Roll Cage / Handlebar Measurement Guide before you order.

Installation

1. Park the bike level so the reservoir is upright.
2. Remove the reservoir cover screws, taking care not to drip brake fluid on paint.
3. Place the base and install the screws (longer screws may be required).
4. Tighten the screws evenly without disturbing the cover gasket.
5. Attach a RAM arm and holder and test the brake or clutch lever operation.

Most installs take under 15 minutes with basic hand tools. Recheck knob tension and fasteners after your first ride.

Where the RAM® Base H-Bar Combination Base Works Best

• Turn-by-turn navigation on cross-country tours and weekend rides
• Music, intercom and ride-tracking apps within easy reach
• Commuting with your phone visible and secure
• Trail maps and GPS tracks on ATV and UTV rides
• Ride-tracking, comms and camera apps on group trail days
• Work use on farm, ranch and job-site machines

Protecting Your Phone From Vibration

High-amplitude vibration, especially from powerful motorcycle engines, can damage the optical image stabilization and autofocus systems in some smartphone cameras. Apple publishes guidance warning iPhone owners about this. To reduce the risk, keep arms short, use rubber-ball joints like RAM’s, and consider adding a RAM Vibe-Safe™ dampener. RAM notes that reducing vibration does not guarantee full protection, so use your judgment on very high-vibration machines.

Care and Maintenance

• Clean with mild soap and water. Avoid harsh solvents that can dry out the rubber balls.
• Check knob tension and base fasteners periodically, especially on off-road machines.
• Replace worn X-Grip post caps or tethers to keep full grip.
• Inspect rubber balls for cracking after long sun exposure, and replace the part if needed.

Complete Your RAM Setup

Build out or upgrade your mount with these compatible RAM parts:

• RAM® Double Socket Arm (RAM-B-201-C)
• RAM® X-Grip® Large Phone/Phablet Cradle (RAM-HOL-UN10BU)
• RAM® Vibe Safe Adapter (RAP-462NPT)
• RAM® X-Grip® Replacement Tether (RAM-HOL-UN8TU)

Browse the full range in our RAM Phone and Device Mounts collection or our Victory and Indian phone and drink mounts.

Helpful Guides From the Witchdoctors Blog

• How to Measure Motorcycle Handlebars
• Discover Top Destinations & Explore the Thrilling Motorcycle Lifestyle
• The Mechanic's Handbook: A Guide to Popular Fasteners and Tools Used on Motorcycles and UTVs

Frequently Asked Questions

Will it work on my reservoir?

It is designed for reservoirs whose covers are held by two screws. Check the screw spacing on your bike before ordering.

Is it safe to remove the reservoir screws?

Yes, as long as the bike is level and the cover stays seated. Brake fluid damages paint, so cover nearby surfaces.

Is it waterproof?

RAM mounts are built for all-weather use and the hardware resists corrosion. Unless a holder is specifically rated waterproof, your device still needs its own protection from rain and dust.

Will it damage my handlebars or paint?

Rubber-padded contact points and correct hardware torque prevent damage. Do not over-tighten clamps on chrome or painted parts.

What warranty does RAM offer?

RAM Mounts backs its mounts and components with a limited lifetime warranty. Mounted devices are not covered.

Is the RAM® Base H-Bar Combination Base compatible with my other RAM parts?

Yes. It uses RAM’s 1" B-size ball, so it works with any RAM B-size arm, base or holder.

Where to Ride

Put your new RAM mount to work on one of these rides:

• Needles Highway and Custer State Park Scenic Drives (Black Hills, South Dakota): granite spires, tunnels and pigtail bridges
• Black Rock Adventure Park (Conneaut, Ohio): about 50 miles of trails

Order Your RAM® Base H-Bar Combination Base Today

Stop juggling your phone and gear and mount it the way the pros do. Add the RAM® Base H-Bar Combination Base (RAM-B-309-7) to your cart today. Witchdoctors ships genuine RAM Mounts parts fast, and our team of riders is ready to help you build the right setup. Questions about fitment? Contact us and we’ll help you choose.

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If your order arrives and it is not right, we will we'll fix it. We promise!

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