Best Go-Kart 3-Speed Gearbox With Reverse Kits for 2hp-16hp Engines
Choosing a reliable forward-reverse gearbox kit can simplify go-kart builds and maintenance, especially when matching a 3-speed setup with a reverse function. This guide spotlights five popular gearboxes designed for 2HP-16HP engines and compatible chains, offering three forward/reverse modes, appropriate shaft sizes, and easy installation. Each product is evaluated on build quality, compatibility, ease of use, and performance in typical kart applications.
| Product | Brand | Engine Range | Drive/Chain Compatibility | Key Feature |
|---|---|---|---|---|
| maXpeedingrods Go Kart Forward Reverse Gearbox Kit | maXpeedingrods | Up to 14HP | #35 chain, 12T; supports #40/41/420 with 10T | Three shift modes, 1:1:3 forward, 1:2:6 reverse |
| Silscvtt Go Kart Forward Reverse Gearbox | Silscvtt | Up to 13HP | 30 Series compatible; 12T/10T sprockets | Three-position gearbox: forward, reverse, neutral |
| Go Kart Forward Reverse Gearbox Replacement (marddpair) | marddpair | 2HP-13HP | 10T #40/41, 12T #35; 3 shift modes | 2300 RPM operation |
| GXYWADY Go Kart Forward Reverse Gearbox Kit | GXYWADY | 2HP-13HP | 35 chain with 12T; 40/41/420 chain 10T | Three shift models; sturdy construction |
| labwork Go Kart Forward Reverse Gearbox Kit | labwork | 2HP-13HP | 30 Series; 35 chain; 12T | 2300 RPM; easy installation |
maXpeedingrods Go Kart Gearbox Kit
This forward-reverse gearbox is designed for go-karts and utility vehicles with engines up to 14HP and uses a #35 chain with 12T sprocket. It includes options for larger chains (40/41/420) with 10T sprockets, expanding compatibility. Key details include a 5/8″ shaft with a 3/16″ keyway, a gearbox speed of 5/13 the clutch, and a 60″ shifter cable. The forward ratio is 1:1:3, and reverse is 1:2:6. The kit arrives with the gearbox, two mounting plates, shifter disc, two shifter cables, and sprockets, providing a comprehensive package for complete installation.
Blast Go Kart Gearbox Kit For 11-16 HP
Designed for heavier applications, this gearbox is suited for engines in the 8-16HP range. It specifies a 3/4″ jackshaft with a 3/16″ keyway but notes that only the gearbox kit is shipped (driver and driven clutch sold separately). This model emphasizes robust construction for demanding off-road use while maintaining straightforward installation.
GXYWADY Go Kart Gearbox Kit Replacement
This kit targets 2HP-13HP engines and supports 35 chain with 12T and 40/41/420 chain with 10T. It offers three shift models (forward, reverse, neutral) and is built to be practical for go-karts and utility vehicles, focusing on sturdy materials for long life and reliable performance in mixed conditions.
marddpair Go Kart Gearbox Replacement
Compact and versatile, this gearbox replacement targets 2HP-13HP engines with a 5/8″ shaft and 3/16″ keyway. It delivers a forward ratio of 1:1.3 and reverse ratio of 1:2.6, with an engine RPM around 2300. The design emphasizes easy installation and compatibility with 30 Series torque converters and standard kart chains.
labwork Front-Reverse Gearbox Kit
The labwork kit targets 30 Series torque converters and 35 chain setups, designed for 2HP-13HP engines. It specifies a 2300 RPM operation and highlights straightforward installation for kart enthusiasts who enjoy building or upgrading their go-karts. The kit includes essential hardware for a complete swap or initial setup.
Blast 11-16 HP Go Kart Gearbox
This model targets higher horsepower applications (11-16HP) and clarifies that only the gearbox kit is shipped, with driver and driven clutch sold separately. It uses a 3/4″ jackshaft with a 3/16″ keyway, catering to users needing more robust gear selection while keeping compatibility with larger engines and heavier loads.
Buying Guide: Key Considerations For Selecting a 3-Speed Gearbox With Reverse
- Engine compatibility: Confirm the engine range (HP and displacement) that each gearbox supports to avoid misfit with your kart’s engine.
- Gear ratios and performance: Look at forward and reverse ratios (for example, 1:1:3 forward and 1:2:6 reverse) to ensure the gearing matches your acceleration and top-speed goals.
- Drive system compatibility: Check chain size (e.g., #35, 40/41/420) and sprocket counts (10T, 12T) to ensure it meshes with your existing drive train.
- Shaft size and keyway: Most kits specify a 5/8″ shaft with a 3/16″ keyway; verify this matches your clutch and jackshaft components.
- Installation effort: Some packages include mounting plates, shifter cables, and assembly hardware; others require additional parts—plan for a complete install.
- Durability and materials: Look for solid metal construction and well-secured gears, especially for heavier or off-road use where stress is higher.
- Three-position operation: Ensure the model supports forward, reverse, and neutral for the needed control flexibility.
- RPM consistency: Some gearboxes list RPM targets (e.g., 2300 RPM) which can affect shift timing and engine matching; align with your engine’s idle and peak RPM.
- Accessories and add-ons: Confirm what’s included (mounting plates, cables, sprockets) and what must be purchased separately to complete the kit.
- Application scope: Consider whether you need a kit for a go-kart, utility vehicle, or other off-road vehicle to ensure sturdiness and fitment.
Overall, selecting a 3-speed gearbox with reverse hinges on engine compatibility, desired gear ranges, and installation practicality. The highlighted products emphasize robust construction, standard drive system sizes, and three-shift operation to support varied karting projects. Evaluate your frame, chain length, and clutch pairing to ensure a seamless integration and reliable performance on track or trail.