{"data":{"model":{"id":"152321","slug":"4-stroke-flathead-v-twin-engine","name":"4 Stroke Flathead V-Twin Engine","authorship":"author","club":false,"excludeCommercialUsage":false,"price":null,"eduProject":null,"ratingAvg":"5.0000000000","myRating":null,"ratingCount":7,"description":"

A flathead engine, also known as a sidevalve engine is an internal combustion engine with its valves contained within the engine block, instead of in the cylinder head, as in an overhead valve engine.

Printing and Assembly
The parts should be printed on a smooth build plate, not textured.
If possible, avoid elephant foot.

I printed the model on a PRUSA MINI, with PLA+ filament, layer height 0.15 mm.
I use Hard Plastic Glue where necessary.

For assembled and exploded views, use .stl files 0\u2026 01... 02\u2026 03\u2026 (do not print).
Printing and assembly in alphabetical order (A1 \u2192 J1).
Printing tips are available for many parts.

Dimensions: 167 x 97 x 129 mm.
Weight: 0.2 kg.

Metal parts
To join the cylinders to the crankcase, eight metal 60 mm M5 threaded rods are needed.
Four coil springs are needed for the valves, 10 mm width x 15 mm height. Wire thickness 0.6 or 0.7 mm (AliExpress).

Constant Mesh Two Speed Gearbox
This engine matches with this gearbox: Constant Mesh Two Speed Gearbox by Bootjevaarder | Download free STL model | PrusaPrinters

","category":{"id":"93","path":[{"id":"90","name":"Learning","nameEn":"Learning","description":"Be inventive! Learn about the world around you and print tools to help you understand. If you are a teacher you will appreciate these educational tools.","__typename":"CategoryType"},{"id":"93","name":"Engineering","nameEn":"Engineering","description":"Become a 3D printing engineer. Combine different methods of manufacturing. Improve existing solutions or make a prototype with mechanical parts.","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2023-11-15T06:25:19.635628+00:00","firstPublish":"2022-03-21T13:34:49.789917+00:00","datePublished":"2023-11-15T06:25:19.624080+00:00","dateCreatedThingiverse":null,"nsfw":false,"summary":"3D printable fully working cut through model of a 4 stroke flathead V-Twin engine","likesCount":397,"makesCount":8,"liked":null,"printDuration":null,"numPieces":0,"weight":null,"nozzleDiameters":null,"usedMaterial":null,"layerHeights":null,"mmu":false,"materials":[],"dateFeatured":null,"downloadCount":850,"displayCount":6866,"filesCount":30,"privateCollectionsCount":253,"publicCollectionsCount":184,"pdfFilePath":"media/prints/152321/pdfs/152321-4-stroke-flathead-v-twin-engine-fc0ef7dc-08d9-42ca-9276-2c6ea4fb0586.pdf","commentCount":19,"userGcodeCount":0,"remixCount":0,"canBeRated":false,"printer":null,"image":{"id":"726012","filePath":"media/prints/152321/images/1440172_15e6ce3d-96e9-4332-91ad-a5f5144bb10a/pic1.jpg","rotation":0,"imageHash":"ahgGDYLqm3qndomPiIV3igV5cJAX","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"images":[{"id":"726012","filePath":"media/prints/152321/images/1440172_15e6ce3d-96e9-4332-91ad-a5f5144bb10a/pic1.jpg","rotation":0,"imageHash":"ahgGDYLqm3qndomPiIV3igV5cJAX","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},{"id":"726013","filePath":"media/prints/152321/images/1440174_86067a4e-7f0d-4bad-a2be-e78cf1cdff4b/pic2a.jpg","rotation":0,"imageHash":"KwgKDYD7e3iXh4mPZXZ4iaCIC5Bp","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},{"id":"726014","filePath":"media/prints/152321/images/1440171_5c2a9718-8b41-4e8d-aaf1-50b605301df9/pic3.jpg","rotation":0,"imageHash":"phgKDYLRqHfdiJdPtHd3eU96+ZSH","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},{"id":"726011","filePath":"media/prints/152321/images/1440173_af1ef435-65f1-438f-a702-0f8bdd2463ea/pic4.jpg","rotation":0,"imageHash":"ZRgKDYBwd4jKd4eah4l3h7Lvuahv","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},{"id":"723282","filePath":"media/prints/152321/images/1434659_01cf1967-f7ed-43be-837f-7c1aed20f065/foto1.jpg","rotation":0,"imageHash":"NfgJDYD3iHiHd4mNdpZ3eAVrEdQF","imageWidth":1213,"imageHeight":910,"__typename":"PrintImageType"},{"id":"724967","filePath":"media/prints/152321/images/1437954_7d86b427-6b9a-4511-84d7-5c1919af684a/foto3.jpg","rotation":0,"imageHash":"9/cJBYD2iXh3h4mNdZd4iZafbp/o","imageWidth":1232,"imageHeight":924,"__typename":"PrintImageType"},{"id":"725024","filePath":"media/prints/152321/images/1438087_e54e154e-0240-42b1-9f05-6d2d88deb026/foto4.jpg","rotation":0,"imageHash":"+/cFBYDYtEqId3ifdWZ2Z9iIj434","imageWidth":1144,"imageHeight":858,"__typename":"PrintImageType"},{"id":"725056","filePath":"media/prints/152321/images/1438187_ee4fc22f-9388-472b-947e-4e1c9f39abe3/foto5.jpg","rotation":0,"imageHash":"+fcFBYD3aId6hoeNdEiXePeKfa/Y","imageWidth":1103,"imageHeight":827,"__typename":"PrintImageType"},{"id":"725096","filePath":"media/prints/152321/images/1438271_b9169750-49d9-4057-93d7-ce8d8ec75aee/foto6.jpg","rotation":0,"imageHash":"9vcJDYCop6iJh3h/h2aHiKmJj5r4","imageWidth":1149,"imageHeight":862,"__typename":"PrintImageType"},{"id":"725128","filePath":"media/prints/152321/images/1438339_44db6970-9821-4659-b612-bdfb0c81f517/foto7.jpg","rotation":0,"imageHash":"+fcFBYD4l3h5h4h+hmV4ifd5fY/X","imageWidth":1068,"imageHeight":801,"__typename":"PrintImageType"}],"tags":[],"thingiverseLink":null,"filesType":null,"previewFile":{"id":"630259","filePreviewPath":"media/prints/152321/stls/1440219_35fdc191-b387-489e-a782-3b3f08b8049b/0-engine-assembled_preview.png","__typename":"STLType"},"license":{"id":"6","disallowRemixing":true,"__typename":"LicenseType"},"remixParents":[],"remixDescription":null,"__typename":"PrintType","user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isFollowedByMe":false,"isHiddenForMe":false,"canBeFollowed":true,"billingAccountType":"personal","lowestTierPrice":null,"highlightedModels":{"models":[{"id":"630206","name":"Christmas Lantern","slug":"christmas-lantern","ratingAvg":"4.9782608696","likesCount":2135,"liked":null,"datePublished":"2024-12-13T21:04:46+00:00","dateFeatured":null,"firstPublish":"2023-10-30T13:39:10+00:00","downloadCount":6545,"mmu":false,"category":{"id":"70","path":[{"id":"65","name":"Seasonal designs","nameEn":"Seasonal designs","__typename":"CategoryType"},{"id":"70","name":"Winter & Christmas & New Year's","nameEn":"Winter & Christmas & New Year's","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2025-01-23T11:01:25.985709+00:00","image":{"id":"2363860","filePath":"media/prints/630206/images/5002206_b496f5eb-42a3-4d56-bca7-ec688b24b70e_c975c8c1-837f-404a-ab20-ed2d59d2ea96/foto5.jpg","rotation":0,"imageHash":"zFkGHYAIOMRXx2mBapmKdwhW0FBp","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"878041","name":"V-Engine KeyRing","slug":"v-engine-keyring","ratingAvg":"4.8000000000","likesCount":1736,"liked":null,"datePublished":"2024-06-17T10:28:03.575348+00:00","dateFeatured":null,"firstPublish":"2024-05-16T07:23:40.572555+00:00","downloadCount":5619,"mmu":false,"category":{"id":"43","path":[{"id":"21","name":"Gadgets","nameEn":"Gadgets","__typename":"CategoryType"},{"id":"43","name":"Other Gadgets","nameEn":"Other Gadgets","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-06-17T10:28:03.601481+00:00","image":{"id":"3139506","filePath":"media/prints/878041/images/6749027_4b92767b-58ee-4c77-87d8-5bbbb1efca0f_52a68baa-7422-442a-b49e-2fefc2fae985/foto3.jpg","rotation":0,"imageHash":"pRgKFYSkdYeqaIiPllh1lwV4YIAH","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"493994","name":"PushRod Engine with Gearbox","slug":"pushrod-engine-with-gearbox","ratingAvg":"4.8750000000","likesCount":1550,"liked":null,"datePublished":"2024-04-03T08:04:27.327395+00:00","dateFeatured":null,"firstPublish":"2023-09-29T10:44:40.123742+00:00","downloadCount":1960,"mmu":false,"category":{"id":"93","path":[{"id":"90","name":"Learning","nameEn":"Learning","__typename":"CategoryType"},{"id":"93","name":"Engineering","nameEn":"Engineering","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-04-03T08:04:27.340406+00:00","image":{"id":"2256729","filePath":"media/prints/493994/images/4763684_1ab01576-76a7-4e01-9d59-888e466454d6_e55cdd55-3b2c-4a95-8a72-5be608488275/foto1.jpg","rotation":0,"imageHash":"JggKDYTxeWeId4eedWd3eA6Jw4BY","imageWidth":1569,"imageHeight":1177,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"180357","name":"Motorcycle Roller Chain Key Ring","slug":"motorcycle-roller-chain-key-ring","ratingAvg":"4.8974358974","likesCount":1474,"liked":null,"datePublished":"2023-09-29T20:04:06.480163+00:00","dateFeatured":null,"firstPublish":"2022-04-28T14:01:16.356175+00:00","downloadCount":3607,"mmu":false,"category":{"id":"89","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","__typename":"CategoryType"},{"id":"89","name":"Automotive","nameEn":"Automotive","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2023-09-29T20:04:06.491179+00:00","image":{"id":"830813","filePath":"media/prints/180357/images/1687309_066f4607-0a81-422e-acf9-294c6237d038/p4285709.jpg","rotation":0,"imageHash":"GSkGDYLw14qbSHePhbZmitaaPz/o","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"239197","name":"OHC V60 Ultramax Engine","slug":"ohc-v60-ultramax-engine","ratingAvg":"5.0000000000","likesCount":1104,"liked":null,"datePublished":"2023-11-15T06:24:28.300478+00:00","dateFeatured":"2023-03-01T09:13:02.801490+00:00","firstPublish":"2022-09-18T12:32:04.795755+00:00","downloadCount":1314,"mmu":false,"category":{"id":"89","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","__typename":"CategoryType"},{"id":"89","name":"Automotive","nameEn":"Automotive","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2023-11-15T06:24:28.315717+00:00","image":{"id":"1210824","filePath":"media/prints/239197/images/2468556_7a84451f-4091-48af-b33d-78694530baad/foto1.jpg","rotation":0,"imageHash":"WikGLYZgeYiWd4WMdkeYhPSHW3+o","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"112243","name":"Motorcycle Key Ring","slug":"motorcycle-key-ring","ratingAvg":"4.8571428571","likesCount":716,"liked":null,"datePublished":"2024-12-27T09:35:22.456774+00:00","dateFeatured":null,"firstPublish":"2022-01-04T14:36:12.050282+00:00","downloadCount":2739,"mmu":false,"category":{"id":"89","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","__typename":"CategoryType"},{"id":"89","name":"Automotive","nameEn":"Automotive","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-12-27T09:35:22.492980+00:00","image":{"id":"1135207","filePath":"media/prints/112243/images/2302278_ad8dc4f6-6193-41b9-8cd1-ea77657ef3f1/foto11.jpg","rotation":0,"imageHash":"2hgKJYShd4iPh3eZhmiHmJuJz3f4","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"379935","name":"4 Stroke Flathead Boxer Engine","slug":"4-stroke-flathead-boxer-engine","ratingAvg":"4.9000000000","likesCount":620,"liked":null,"datePublished":"2024-06-26T06:57:10.914195+00:00","dateFeatured":null,"firstPublish":"2023-02-10T09:28:08.840552+00:00","downloadCount":1035,"mmu":false,"category":{"id":"89","path":[{"id":"48","name":"Hobby & Makers","nameEn":"Hobby & Makers","__typename":"CategoryType"},{"id":"89","name":"Automotive","nameEn":"Automotive","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-06-26T06:57:10.926065+00:00","image":{"id":"2351032","filePath":"media/prints/379935/images/4974387_05881860-e54f-43a3-8213-b456b3b93ccd_526faa34-2206-4690-8768-1dc452f7f248/foto1.jpg","rotation":0,"imageHash":"pBgGJYTAmKeneHmNh5Z2iylnkHIG","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":null,"__typename":"PrintType"},{"id":"693343","name":"V90 Pushrod OHV Engine","slug":"v90-pushrod-ohv-engine","ratingAvg":"5.0000000000","likesCount":595,"liked":null,"datePublished":"2024-11-11T11:26:54.672894+00:00","dateFeatured":null,"firstPublish":"2024-10-11T19:03:06.160722+00:00","downloadCount":694,"mmu":false,"category":{"id":"93","path":[{"id":"90","name":"Learning","nameEn":"Learning","__typename":"CategoryType"},{"id":"93","name":"Engineering","nameEn":"Engineering","__typename":"CategoryType"}],"__typename":"CategoryType"},"modified":"2024-11-11T11:26:54.688897+00:00","image":{"id":"3643273","filePath":"media/prints/693343/images/7873648_d00ae5d0-e3e1-4c23-870c-7e69b250f0e0_06199727-12f0-4ed0-82db-856e3231ef6d/foto1a.jpg","rotation":0,"imageHash":"bQgODYL2iIiaZot6eLZ3eAh2k2A3","imageWidth":1600,"imageHeight":1200,"__typename":"PrintImageType"},"nsfw":false,"club":false,"price":null,"user":{"id":"177081","handle":"Bootjevaarder","verified":false,"dateVerified":null,"publicUsername":"Bootjevaarder","avatarFilePath":"media/auth/avatars/90/900114d5-3e6a-46d7-84ec-b625667c01ed.png","badgesProfileLevel":{"profileLevel":15,"__typename":"BadgesProfileLevelType"},"__typename":"UserType","isHiddenForMe":false},"latestContestResult":{"ranking":null,"competitionId":"453","__typename":"PrintLatestCompetitionResult"},"__typename":"PrintType"}],"featured":false,"__typename":"HighlightedModelsType"},"designer":false,"stripeAccountActive":true,"membership":null},"contests":[],"contestsResults":[],"prusameterPoints":null,"latestContestResult":null}}}