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Stirlingkit RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model
Stirlingkit RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model, view 2Stirlingkit RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model, view 3Stirlingkit RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model, view 4Stirlingkit RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model, view 5Stirlingkit RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model, view 6
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RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke Motorcycle Gasoline Engine Model

$719.99–$799.99Save up to 15%

In stock at stirlingkit.com

The RETROL Evolution R33 is a 4.2cc running V-twin four-stroke gasoline engine model based on the 1970s Evolution motorcycle engine. It is machined from brass and stainless steel, sits on a wooden base and ships ready to run with ignition gear. It suits collectors who want a working miniature motorcycle engine on the desk.

Shop now at Stirlingkit →Code start

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Verson
Old Version · New Version

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Highlights

  • 4.2cc V-twin, OHV four-stroke
  • Brass and stainless steel construction
  • Upgraded intake and exhaust valves, flick-style throttle
  • CDI ignition, drill or manual start
  • Ready to run on a 15 x 12cm wood base

Best for

Motorcycle and model engine fans who want a running V-twin replica.

Things to consider

  • Needs 3 AA batteries for ignition (not included)
  • Runs on gasoline with a 25:1 oil mix, so it needs a safe place to run
  • Old and new versions differ but the listing does not explain how

Key specs

Price$719.99–$799.99
Displacement4.2cc
Scale1/5
Bore x stroke13mm x 16mm
Weight1,300g
Age14+

Our take

A beautifully made running V-twin; the new version is likely worth the extra if you are buying fresh.

RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke… at a glance

BrandStirlingkit
Price$719.99–$799.99 (some options up to 15% off)
Options2 versons
AvailabilityIn stock at stirlingkit.com
Couponstart
ReturnsThe about page lists a 30-day return or exchange. All returns need an RMA requested via…

Price check

At $719.99, the RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke… is toward the top of Stirlingkit's price range, whose 2,729 listed products run $0.54 to $11,000.

Some options are on sale, up to 15% below their listed price; the discount depends on the option you choose. Sale prices can end without notice, so check the live price before you order.

Similar items from other brands we track run $95 to $298.

Buying from Stirlingkit

Stirlingkit is a good source for hobbyists who want running miniature engines, Stirling and steam models, and build kits that most toy stores never carry. Skip it if you need fast, cheap returns, since everything goes through an emailed RMA to a Shenzhen address. Check the shipping method and warehouse at checkout first, because airmail can take 15 to 35 business days.

Shipping
Airmail takes 15 to 35 business days, EMS 5 to 8, and DHL Express 3 to 7. Shipping fees vary by product, warehouse, and destination and show on each product page and at checkout.
Returns
The about page lists a 30-day return or exchange. All returns need an RMA requested via service@stirlingkit.com, and items must include original packaging and accessories with no physical damage.
Warranty
The about page lists a 1-year warranty and lifetime customer support.

Read our full Stirlingkit review and shop all products →

Frequently asked questions

What fuel does it use?
95 octane gasoline mixed with 2T oil at 25:1.
Does it come with batteries?
No. The ignition needs three AA batteries, sold separately.
How do I start it?
With an electric drill or by hand.
Is the RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke… on sale?
Yes, some options are discounted, up to 15% off; it currently sells for $719.99–$799.99. The exact saving depends on the option you pick, so check it on stirlingkit.com.
Is there a coupon code for the RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke…?
Stirlingkit's store-wide code start can be entered at checkout on stirlingkit.com. Stirlingkit sets the discount, and some items or sale prices may be excluded.
What is Stirlingkit's return policy?
The about page lists a 30-day return or exchange. All returns need an RMA requested via service@stirlingkit.com, and items must include original packaging and accessories with no physical damage.
How long does Stirlingkit take to ship?
Airmail takes 15 to 35 business days, EMS 5 to 8, and DHL Express 3 to 7. Shipping fees vary by product, warehouse, and destination and show on each product page and at checkout.
Does the RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke… come with a warranty?
Stirlingkit's published warranty terms: The about page lists a 1-year warranty and lifetime customer support.
What options does the RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke… come in?
Verson: Old Version, New Version.
Where can I buy the RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke…?
The RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke… is sold directly by Stirlingkit on stirlingkit.com. The Shop now button on this page goes straight to the product there, and code start can be applied at checkout.
Is the RETROL Evolution R33 V-twin 4.2CC OHV Four-stroke… in stock?
Yes. Stirlingkit lists it as in stock on stirlingkit.com as of our latest check. Stock and prices refresh throughout the day.
Is Stirlingkit a legit store?
Stirlingkit is a good source for hobbyists who want running miniature engines, Stirling and steam models, and build kits that most toy stores never carry. Skip it if you need fast, cheap returns, since everything goes through an emailed RMA to a Shenzhen address. Check the shipping method and warehouse at checkout first, because airmail can take 15 to 35 business days. Our full Stirlingkit review covers shipping, returns and what to check before ordering.

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