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RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model - RETROL 4-Stroke & Inline Engines
RETROL

RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model

★★★★★
5.00 / 5.0 (1 verified review)
$719.99 USD $849.99 Save $130.00

Engineering Summary

The RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model is a 1/5 4.2CC 4-Stroke & Inline Engine precision-engineered by RETROL. Features construction machined from brass + stainless steel and operating on 95# Gasoline. Available for $719.99 USD with free worldwide tracked shipping, 30-day returns, and replacement parts support at Stirlingkit.

✓ Free Worldwide Shipping: Tracked air delivery in 5–14 business days.
✓ Missing Parts Guarantee: Free replacement parts dispatched within 7 days.
✓ 30-Day Risk-Free Returns: Full refund on unbuilt kits in original box.

Technical Specifications

26 Verified Parameters
Color Brassiness + Sliver
Material Brass + Stainless Steel
Model Brand RETROL
Type V-Twin Cylinder Four-stroke Engine Gasoline Engine
Product State Ready to Run
Overall Dimensions 15 x 12 x 14cm
Engine Dimensions 12 x 9 x 11cm
Wooden Base Dimensions 15 x 12 x 3cm
Scale 1/5
Displacement 4.2CC
Cylinder Diameter 13mm
Stroke 16mm
Cooling Method Air-cooled
Starting Method Electric Drill Start/Manual Start
Ignition Method CDI Electronic Ignition
Spark Plug Type 3/16-40 Inch Threaded Spark Plug
Lubrication Method Mixed/Splash Lubrication (Gasoline/Oil=25/1)
Fuel 95# Gasoline
Oil 2T Oil
Starting Power Battery 4.5V AA Battery*3 (Not Included)
Product Weight 1300g
Product Dimensions 12 x 9 x 11.5cm
Package Weight 2000g
Package Dimensions 20 x 20 x 20cm
Packaging Gift Box
Ages 14+

Features, Architecture & Package Contents

RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model

note: this engine is in stock now.



Features:


.Based on the V-twin cylinder motorcycle engine EVOLUTION from the 1970s, representing a highly iconic engine that wonderfully embodies the spirit of different eras.
.Featuring upgraded intake and exhaust valves enhance the power significantly, this engine, one of the most complex engines, exudes a retro charm with a classic body, cold cooling structure, a brand-new carburetor as well as the flick-style throttle lever, allowing for a more authentic real engine.
.Every carefully designed and processed component is crafted from brass and stainless steel materials. Come with a wooden base for easy placement and operation, ensuring smooth operation.
.Including starting and ignition devices, ready to run at any time, this model is friendly to novice model enthusiasts. You will be enticed by its good performance when it is running.
.Perfect as a coveted collectible for displaying and playing with, as well as for personal use or as a high-end model gift for friends and family during major holidays.
.Notes:
1. In the ignition device, if the machine does not start with the normal compression of the cylinder, you need to adjust the needle of the carburetor.
2. Tighten the main needle on the carburetor, loosen 1/4 cycle and turn the flywheel to ensure the normal mixture ratio of gasoline and air.
3. Turn off the power switch when the machine stopped.

Specifications:

.Color: Brassiness + Sliver
.Material: Brass + Stainless Steel
.Model Brand: RETROL
.Type: V-Twin Cylinder Four-stroke Engine Gasoline Engine
.Product State: Ready to Run
.Overall Dimensions: 15 x 12 x 14cm
.Engine Dimensions: 12 x 9 x 11cm
.Wooden Base Dimensions: 15 x 12 x 3cm
.Scale: 1/5
.Displacement: 4.2CC
.Cylinder Diameter: 13mm
.Stroke: 16mm
.Cooling Method: Air-cooled
.Starting Method: Electric Drill Start/Manual Start
.Ignition Method: CDI Electronic Ignition
.Spark Plug Type: 3/16-40 Inch Threaded Spark Plug
.Lubrication Method: Mixed/Splash Lubrication (Gasoline/Oil=25/1)
.Fuel: 95# Gasoline
.Oil: 2T Oil
.Starting Power Battery: 4.5V AA Battery*3 (Not Included)
.Product Weight: 1300g
.Product Dimensions: 12 x 9 x 11.5cm
.Package Weight: 2000g
.Package Dimensions: 20 x 20 x 20cm
.Packaging: Gift Box
.Ages: 14+

Verified Builder Reviews (1)

Authentic feedback from hobbyists, machinists, and scale model engineers

5.00 / 5.0
★★★★★ (1 total)
Ronald Taddeo Verified Buyer
★★★★★

First imoression

I was excited when the engine arrived ! It met all my expectations as I removed it from the well-padded box. Having experience with miniature engines , I immediately fueled it up , added the ignition batteries, primed the carb and spun it over by hand .. it fired up instantly and ran flawlessly.! I am very satisfied!

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