RS40-1B-9T Simplex Sprocket for Mini Bike/Go-Kart
Part Code: RS40-1B-9T
Part Name: Simplex Sprocket for Mini Bike/Go-Kart
Part Name: Simplex Sprocket for Mini Bike/Go-Kart
Part Code: RS40-1B-9T
Usage: This Sprocket is used in Provides high-torque, reliable chain drive for go-karts and mini bikes using #40 chain systems.
Application of Type-C 9T #40 Drive Sprocket for Go-Karts & Mini Bikes
Engineered for High-Torque Off-Road Power Transmission:
Used as the secondary/output drive sprocket on Rattler go-karts and TrailMaster MB200-2 mini bikes, this component transfers power from the engine or torque converter to the rear wheel through a #40 roller chain. Designed for strong launch power, hill-climbing capability, and reliable propulsion on rough terrain.
Optimized for Stability, Torque Output & Durability:
The Type-C long-hub design offers extended shaft engagement, improving alignment, vibration control, and secure mounting under variable loads. Its 9-tooth configuration maximizes torque at low speeds, making it ideal for off-road machines that require strong pull and consistent power delivery.
Trusted Across Recreational Vehicle Manufacturers:
Commonly used in go-karts, mini bikes, and light off-road vehicles from TrailMaster, Rattler, Coleman, Mega Moto, Manco, and similar brands. Frequently included in aftermarket torque converter kits, small vehicle drivetrains, and #40 chain-drive systems with 5/8-inch output shafts.
Summary
A compact, torque-focused sprocket built for rugged off-road performance. Its extended hub, low tooth count, and robust construction deliver dependable power transfer in recreational vehicles operating under high load and uneven terrain.
| Parameter | Value / Description |
|---|---|
| Application | Primary drive for Rattler go-kart, TrailMaster MB200-2 mini bike, and similar compact vehicles |
| Sprocket Type | Type-C (extended hub/shoulder, see drawing) |
| Number of Teeth | 9 |
| Pitch | 12.7 mm (0.5") |
| Pitch Circle Diameter | ~36.51 mm (calculated for 9T, #40 chain) |
| Outside Diameter (OD) | ~46.7 mm (see drawing Ø1.84" ≈ 46.74 mm) |
| Bore Diameter | 0.625" (15.88 mm, matches Ø0.625 in drawing) |
| Keyway | 0.188" (4.77 mm, standard for 5/8" shaft) |
| Face/Overall Width | 1.00" (hardened hub width, see section) |
| Hub/Shoulder Width | 0.28" (see section A-A) |
| Mounting Type | Type-C extended hub—keyway and setscrew for secure fit |
| Material Property | Medium/high carbon steel, may be induction hardened |
| Surface Treatment | Black oxide, phosphate, or zinc plated (corrosion resistant) |
| Teeth Details | Standard ANSI/DIN profile, precision machined |
| Total Weight | ~0.2–0.3 kg (approx.) |
| Sample Chain Pull (F) | 800–1200 N (compact vehicle transmission) |
| Sample Sprocket Speed (N) | 300–1500 RPM (mini bike/go-kart) |
| Sample Torque (T) | 5–25 Nm |
| Sample Power (P) | Up to 0.25 kW |
