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

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