Built by one craftsman in Osaka, Japan.
1/6 Scale Vintage Engine Models.
Our most chosen engine
1/6 Scale Knucklehead Real Aging Model
¥24,600
1936 — Harley-Davidson's first OHV. The iconic knuckle covers, finished with real aging that recreates black rust, red rust and more.
Customer review (translated from Japanese)“Remarkably realistic, with a real sense of weight — detailed down to the smallest parts.”
Free shipping in Japan | 30-day returns
View this engine →Our next Drop goes to email subscribers 24 hours early.
V-Twin Lineage
The Harley V-Twin Lineage, in 1/6 Scale.
From Flathead to Twin Cam — trace the complete lineage of the V-Twin, era by era.
1/ 7
1929–1948
Flathead
Side-ValveFrom ¥22,600View
2/ 7
1936–1947
Knucklehead
First OHVFrom ¥22,600View
3/ 7
1948–1953
Panhead
Golden-Era OHVFrom ¥22,600View
4/ 7
1966–1969
Early Shovel
The BridgeFrom ¥22,600View
5/ 7
1966–1984
Shovelhead
S&S B CarbFrom ¥22,600View
6/ 7
1984–1999
Evolution
The MasterpieceFrom ¥22,600View
7/ 7
1999–2006
Twin Cam 88
Twin CamshaftsFrom ¥22,600View
Collections
Find Your Entry Point.
Collect, finish, carry — choose the way you enjoy them.
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INSTAGRAM
Followers
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REVIEW
Average rating
4〜5 days
HANDCRAFT
To complete
30 days
GUARANTEE
Return guarantee
What our customers say
Absolutely stunning and detailing model ! Arigato gozaimashita!
Lyuben Balgaranov
Hello, good afternoon.
I'm really impressed with the quality of this Harley engine.
I really appreciate the excellent craftsmanship of this model. I rode a 1340 Shovelhead 40 years ago—my engine looked exactly like this, right down to the carburetor. Now I ride a 1340 Evo. I also bought the 1:6 scale Harley engine from Scale Model Choppers. I highly recommend these models! I’ll definitely be buying from here again and again.
Best regards from Germany.
Matthias Wilhaus
凄く良かった。
和貴 味岡
Hello, good afternoon.
I'm really impressed with the quality of this Harley engine.
I really appreciate the excellent craftsmanship of this model. I rode a 1340 Shovelhead 40 years ago—my engine looked exactly like this, right down to the carburetor. Now I ride a 1340 Evo. I also bought the 1:6 scale Harley engine from Scale Model Choppers. I highly recommend these models! I’ll definitely be buying from here again and again.
Best regards from Germany.
Translated with DeepL.com (free version)
Matthias Wilhaus
とても精巧に出来ていて大満足でした♪
賢一 筒井
Amazing piece! Been trying to get one of these models for the past year and just discovered that they now ship overseas to the US.
Colin Lonergan
最高です！！
TSUTOMU YOSHIDA
最高です！
TSUTOMU YOSHIDA
以前乗っていたエンジンが、こちらの1/6モデルで甦りました！とても素晴らしいです
匿名
思った以上にリアルで以前乗ってたエンジンを思い出しました！
匿名
It is an amazing model engine, well packaged, quick delivery and professional model maker Mr .Shun Sakai. The appearance of the model is really impressive especially with the hand painted and the effect of weathering. I would like to recommend the scale model choppers to everyone. Thank you
Cy Cheng
とても良い商品です。素晴らしいと思います。余談ですが先日修理してもらいたくメールを送らせてもらったのですが返答がないのでこの場に書かせてもらいますが修理できますでしょうか？返答お待ちしてます。ちなみにGメールの方に送りました。よろしくお願いします
真柄 敦
WolfsRain の屋号を台座に彫りこんでくれて、買ったばかりの頃のショベルヘッドを表現してくれて、更に、今の雰囲気を再現するべく鉄のヘッドやポイントカバーなど、随所に拘りを詰め込んでくれたのが嬉しかったんだよね。写真から、そのひとりひとりのバイクを観察し、忠実に再現する姿勢は、お客様に寄り添って完成させていってるんだと思うので、とても感心しました。今度は、トライアンフユニットも再現して貰うかな。ありがとね。
Tatsumi
彼氏へのクリスマスプレゼントとして購入しました。彼はハーレーのショベルヘッドエンジンが一番好きで、普段からショベルの話をよくしているので、見つけた瞬間に「これだ」と思いプレゼントに選びました。
実物を見てまず驚いたのが、想像以上に細部まで作り込まれていることです。エンジンのフィンやキャブレターなど、細かい部分までとてもリアルに再現されていて、バイク好きの方なら見ているだけでも楽しめると思います。クオリティが高く、大変満足しております。プレゼントとして渡したところ彼もとても喜んでくれて、すぐに部屋に飾って眺めてくれています。
また機会があればぜひ購入させていただきたいと思います。
Mizushovel
かなりリアルに再現されていて、重厚感があり!細かいところまで作りこまれています。
正人 宮村
Why Scale Model Choppers
Crafted Entirely by Hand.
A small workshop — and exactly why there is no compromise on any single piece.
High-Precision 3D Printing
Resin (SLA) 3D printing reproduces every fin and pipe in fine detail.
Finished by Hand
Painted and aged by hand, one piece at a time.
The Complete Lineage
Flathead to Evolution — a full lineage that is rare anywhere in the world.
Trusted by Builders
Trusted with commissions from custom builders at home and abroad.
The Process
The real bike
1/6 model
Real bike: Knucklehead by zephyr machine. Drilled heads, fin shapes and the chrome Linkert, all recreated.
CUSTOM ORDER
Your bike's engine, custom parts and all, in 1/6 scale.
Working from photos of your bike, I build everything in 1/6 scale, from the engine itself to the smallest custom parts. With close attention to form, paint and aging, I recreate the details that make your bike yours.
What I recreate
- Custom parts such as the carburetor and air cleaner
- Fin shapes and fine machining details
- Paint, chrome, rust and oil stains
- A dedicated display base with your bike's or shop's name
My craft
- Every part designed in 3D and sculpted down to the finest detail
- Shapes and colors refined by comparing against photos of the real bike
- Painting and aging finished by hand
Why Has the Shovelhead Been So Misunderstood? — The Engine That Survived the AMF Era, 1966–1984
For years the Shovelhead was written off as a "bad era" Harley. The AMF backdrop, how to tell Generator and Cone years apart, and why it's being re-evaluated today —...
Why Has the Shovelhead Been So Misunderstood? — The Engine That Survived the AMF Era, 1966–1984
Why Has the Shovelhead Been So Misunderstood? — The Engine That Survived the AMF Era, 1966–1984
About Us
My custom motorcycle models, which I made as a hobby, became popular on social media,
and I started receiving requests like, "I'd like you to make a model of my bike too."
At 30, I introduced a 3D printer, expanding my production capabilities.
I bring to life the "feelings" that cannot be expressed with off-the-shelf products.
FAQ
How long does it take to make?
Each engine model takes about 4–5 days to complete, including drying and curing time.
Every step — 3D printing, sanding, painting and aging — is carefully done by hand.
What is the delivery time?
In-stock items arrive within 2–3 days of your order.
Out-of-stock items arrive within 1–2 weeks of your order.
For custom orders, timing depends on the build, so please get in touch to discuss.
*Times may vary slightly during busy periods
Can you ship internationally? How much is shipping?
Yes, we ship anywhere in the world.
Shipping costs vary depending on the region. They will be calculated automatically when you enter your shipping address on the cart screen.
How big is it actually?
Each model is about 12 cm tall × 8 cm wide × 5.5 cm deep.
It weighs about 100 g — roughly half the weight of a smartphone.
It fits in the palm of your hand, perfect for displaying on your desk or in your garage.
What happens if it gets damaged?
We pack every order very carefully, but if your item is damaged in transit,
please contact us with photos within 30 days of delivery. We'll cover the return shipping and issue a full refund.
Is gift wrapping available?
Yes, we offer gift wrapping free of charge.
Just write "Gift wrapping please" in the order notes when you check out.
Can I have it custom made?
Yes! We'll build it to match your own bike or the specs you have in mind.
Is maintenance required?
No special maintenance is required.
If you are concerned about dust, gently brush it off with a soft brush or compressed air.
We recommend displaying it away from direct sunlight.
Can I return an item?
Yes — we accept returns for any reason within 30 days of delivery. If you're not satisfied once you see the piece in person, we'll give you a full refund.
Before returning an item, please make sure it meets the following conditions:
- You contact us within 30 days of delivery
- The item is unused and free of damage or stains
- All included items (box, instructions, etc.) are returned with it
Please note that custom-made items and 3D CAD models (digital products) cannot be returned. For change-of-mind returns, return shipping is paid by the customer.
If your item is defective, was damaged in transit, or isn't what you ordered, please contact us within 30 days of delivery. We'll cover the return shipping and issue a full refund.
What payment methods are available?
We accept credit cards (Visa, Mastercard, AMEX, JCB),
PayPal, Shop Pay, PayPay, Merpay, and konbini (convenience store) payments.