Description
The RETROL R31 is a miniature V-Twin four-stroke gasoline engine inspired by the classic motorcycle shovel engines of the 1960s. Crafted from brass and stainless steel, this 1:5 scale model delivers a realistic mechanical experience with precisely engineered components and a stunning retro design. Featuring an air-cooled system, upgraded carburetor, and electronic CDI ignition, this engine is both a functional model and a collector’s masterpiece.
With ready-to-run capability, it’s perfect for engine enthusiasts, hobbyists, and model collectors. Whether used for display, experimentation, or as an educational tool, the RETROL R31 offers an immersive hands-on experience.
Key Features:
- Authentic V-Twin Design – Inspired by 1960s motorcycle engines, featuring classic body lines and a detailed carburetor structure.
- Precision Engineering – CNC-machined brass and stainless steel parts for smooth operation.
- Dual Start Mode – Supports both electric drill start and manual pull start.
- Realistic Operation – Runs on 95# gasoline, utilizing a CDI electronic ignition system and a 3/16-40 spark plug.
- Collector's Item & Gift-Worthy – A unique high-end model for enthusiasts, engineers, and collectors.
- Beginner-Friendly – Comes with ignition and start-up components, making it accessible for novice users.
Specifications:
- Brand: RETROL
- Model: R31
- Material: Brass, Stainless Steel
- Color: Brass, Silver
- Overall Size: 5.91" × 4.72" × 5.51" (150 × 120 × 140 mm)
- Engine Size: 4.72" × 3.54" × 4.33" (120 × 90 × 110 mm)
- Wood Base Size: 5.91" × 4.72" × 1.18" (150 × 120 × 30 mm)
- Weight: 42.33 oz (1200 g)
- Scale: 1:5
- Type: Two-Cylinder Four-Stroke Gasoline Engine
- Displacement: 4.2CC
- Cylinder Bore: 0.51" (13 mm)
- Stroke: 0.63" (16 mm)
- Cooling Method: Air Cooling
- Start Mode: Electric Drill Start / Manual Start
- Ignition: CDI Electronic Ignition
- Spark Plug: 3/16-40 Threaded Spark Plug
- Lubrication: Mixed/Splash Lubrication (Gasoline/Oil = 25:1)
- Fuel Type: 95# Gasoline
- Oil Type: 2T Engine Oil
- Power Supply: 4.5V (3 × AA Batteries, not included)
- Recommended Age: 14+
- Packaging: Gift Box
- Included Items: Engine ×1, Electric Drill Coupling Shaft ×1, Hand Puller ×1, Spare O-Ring Set ×1, Manual ×1

RETROL R31 4.2CC OHV | V-Twin Cylinder Gas Mini Engine
$797.00