Motorcycle performance hinges on precise, quick shifting. The right air shifter or related transmission upgrade can reduce wear, improve shift speed, and enhance overall ride quality. Below are five well-regarded options from trusted brands that help modernize your transmission air system or upgrade your shifter components. Each entry includes a concise look at build quality, compatibility, and installation considerations to help riders and shop technicians decide which kit or part best fits their bike.
| Product | Brand | Key Benefit | Compatibility note |
|---|---|---|---|
| Foruly Air Line Kit | Foruly | Increases air volume to shift valve for quicker shifts | Replaces fittings; suited for Fuller transmissions |
| Auxazalux Air Line Kit | Auxazalux | Long lifespan with 12 ft PU lines and plug-and-play fittings | 9–18 Eaton Fuller transmissions |
| Benlari Inner Shifter Lever Shaft Kit | Benlari | Rust-resistant 304 stainless steel; smooth shifting | Harley-Davidson Touring models (various years) |
| Dreamseek Heel Toe Shifter | Dreamseek | Eco-friendly chrome look with broad Harley compatibility | Harley FL Softail and Touring models |
| VG MOTO Gear Shifter Linkage | VG MOTO | Adjustable linkage for positive, precise shifts | Harley Dyna/Softail/ Touring (1986 onward) |
Foruly Air Line Kit for Fuller Transmissions
Foruly offers an air line kit tailored for Eaton Fuller transmissions, featuring four 12-inch, 5/32″ air lines with push-in fittings and four air line shift knobs. The kit aims to update the transmission air system, replacing fittings and increasing air volume to the shift valve. By delivering more air to the shift valve, the setup is designed to shorten gear-change times and reduce wear on synchronizers during both high and low-speed shifts. This kit targets drivers seeking faster, more reliable shifts without replacing the entire air system.
Auxazalux Air Line Kit For Eaton Fuller Transmissions
Auxazalux provides a complete air line kit designed for 9, 10, 13, 15, and 18 Eaton Fuller transmissions. It includes four 12-foot, 5/32″ PU air lines with flame-retardant properties and multiple fittings. The package covers 3 x 90-degree fittings and 5 x straight fittings, enabling a robust plug-and-play installation. The kit claims to restore performance by eliminating aging-related shifting issues and preserving air transmission efficiency, with lines that can be cut to fit specific setups.
Benlari Inner Shifter Lever Shaft Kit
The Benlari kit uses 304 stainless steel for the inner shifter lever shaft, offering corrosion resistance and long-term durability. The design focuses on smooth, precise shifting while adding a chrome finish for an enhanced aesthetic on compatible Harley models. Installation is described as straightforward, with emphasis on reliable operation and extended service life for daily riding or touring.
Dreamseek Heel Toe Shifter Lever
Dreamseek offers a chrome heel-toe shifter lever with broad compatibility for Harley Softail and Touring models, including various FL and Tri Glide configurations. The kit is aimed at riders seeking a broader shifting interface and a stylish chrome finish. Compatibility notes indicate a focus on older and newer model-year ranges across several Harley families, with the goal of a comfortable, precise shifting experience.
KHGUZ Folding Gear Shifter Lever
KHGUZ markets a foldable gear shifter lever designed for 50cc to 110cc motorcycles and dirt bikes, with 50cc to 150cc range noted in compatibility. Made from aluminum alloy and steel, the lever aims to balance light weight with strength. It provides a practical, ergonomic shifting experience and includes provisions for venting and tubing connections to help maintain pressure balance within small-engine systems.
PRO BAT 135° Hand Control Gear Shifter
The PRO BAT 135° hand control gear shifter is designed for a wide range of smaller motorcycles and ATVs. With an 11mm lever shaft and 135° design, this lever is sized for comfortable manual operation across a variety of engine classes—from 50cc up to 250cc. The kit emphasizes compatibility with pit bikes, ATVs, and quad configurations, providing a robust, practical option for riders seeking a straightforward gear change experience.
VG MOTO Gear Shifter Linkage
VG MOTO’s gear shifter linkage is designed for Harley models from 1986 onward, with notes on compatibility exclusions for certain Softail variants. The linkage is constructed from billet aluminum with a hard anodized finish for rust resistance, offering an adjustable length from 12″ to 13″ to tailor shifting feel. This option targets riders who want a more positive, precise engagement between the shift lever and transmission.
CNC Aluminum Foldable Gear Shift Lever
The CNC aluminum gear shift lever is designed for 50cc to 250cc class bikes, including dirt and pit bikes. The foldable design helps reduce damage in tight riding environments, while the aluminum build keeps weight low. Installation guidance emphasizes checking model compatibility and ensuring the lever size matches the bike’s shift shaft specifications.
Buying Guide: Key Considerations For Air Shifter and Shifter Upgrades
- Compatibility: Check engine displacement, transmission type (Eaton Fuller, Harley models, etc.), and model year range to ensure the kit or lever fits your bike.
- Air System Upgrades: For air line kits, evaluate line length, material (PU or other), insulation/ flame-retardant properties, and fittings that match your shift valve configuration.
- Durability: Stainless steel and billet aluminum components typically offer better corrosion resistance and longevity in harsh riding conditions.
- Installation Complexity: Some items are plug-and-play, while others require more extensive routing or fitting adjustments; consider whether professional installation is preferred.
- Shifting Feel: Adjustable linkages and lever lengths affect shift precision and feedback; ensure you can fine-tune tension and travel to match your riding style.
- Aesthetics vs. Function: Chrome and polished finishes may enhance appearance, but ensure material performance and fit are priority for reliability.
- Maintenance: Review whether components are easy to clean or disassemble for regular maintenance, especially on longer trips.
- Cost vs. Benefit: Balance immediate installation costs with expected gains in shift speed, gear wear reduction, and overall ride quality.