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THIS IS THE TEST SITE OF EUROBRICKS!
THIS IS THE TEST SITE OF EUROBRICKS!

steph77

Eurobricks Knights
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  1. The green bar has been used because it is a little tighter than regular axles. And it pass throughout the swing arm articulation in a inclined way . For the shifter. Here you go. I only have one new know gear so this build is a variant for those who didn't have one. If you got one. Simple actuate the shifter directly with this one. The purpose of having two yellow know gears is only to get a 90 degree orientation as the idle point of the gear shifter is 45 degree. Don't forget to add the springs. Directly on the 5l axle and only the soft ones. S.
  2. Ok, @JoKo; I never noticed it before, but it seems logical and so i worked on your idea. First, i designed the pistons units in this way in order to keep a good clearance vs the foot rest and shift lever. As this one is on the lefty side of the bike and considering the fact that on the real BMW the left side cylinder is the most forward of both, i decided to keep my original design for this one. I so redesign, based on your idea, the right hand cylinder bloc. In order to keep a clee build, the whole bloc is now one stud longer, but the positioning of the cylinderhead has a one half stud ofset. Here it is: Top view Bottom view - Left cylindre - right cylindre: Now, the ultimate solution would be to have one only shaft for the two cylindres, i had some ideas about it, but it first needs to be tested before saying more. Thanks for your imput! Thanks for comment this build!, You are spot on! This roud bar works just fine because this transmission is very smooth and the gearing is quiet kept low.
  3. Oups, i found this info on brickset....Ok i change this in the main post right now. Sorry @Milan
  4. First of all, my best wishes to everyone for this upcoming New Year! I wish you all the best and, especially, plenty of great MOCs. Speaking of this... BMW GS 1250 Ever since Lars Thygesen designed the 42063 set, I’ve had the idea of building my own version of it in the back of my mind. I must say I was impressed by Lars Thygesen's design, particularly in three areas: The telelever suspension system The rear mono swingarm, which has the amazing advantage of not bending too much The simplified yet good-looking front panel design Using this as inspiration, I decided to retain these three elements in my own design. Of course, since the chassis is 100% different, all mounting points and geometry have been redesigned to fit my build. Okay, let’s move on to some pictures. We'll start with the naked chassis and follow the build to the final design. (Sorry for the picture quality; I’m doing the best I can with my phone and the bad weather!) As you can see, the basic structure closely resembles the real design: a lower boxer engine and gearbox with a low center of gravity. The gearbox is the main feature of this build. It’s unique in many aspects, starting with a brand-new shifting and stepper mechanism. I used to rely on @legotechnicmastery's design, but for this build, I wanted something original. This became a reality with the introduction of the new 45° knob gear, which is a key part of the concept. The stepper mechanism is only spring-loaded—no rubber bands! Rubber bands are always the weak point in existing stepper designs as they’re not reliable over time. In the picture below, you can see the principle of the stepper. The pulley wheels rotate and push a 5L axle that actuates the gray knob: After being actuated, the pre-tensed 90° locking mechanism (as shown below) completes the movement and locks the system. The pedal automatically returns to the neutral position, ready for the next shift. In the upper picture, you can also see the light bluish-gray indicator/limiter that prevents shifting from first gear directly to fourth. The gearbox itself is based on a rotary catch and is much more compact than the new parts seen in 1:5 models from TLG. It has four speeds and uses a unique configuration. Since the engine is a boxer type with two camshafts, I needed to add a complementary free wheel (16T), which is located on the transfer axle of the gearbox. Looking from below, you’ll notice I used a special axle in the area of the swingarm fixation. This wasn’t strictly necessary, but this solution provides 100% security, ensuring the axle never touches anything. The overall transmission is surprisingly smooth, even in fourth gear. Around this base, all other elements are integrated. Here they are: As always, the next steps involved a bunch of tricky angles, improbable mounting points, and more. This section includes the fuel tank and rear assembly—relatively easy—but fixing the front-end panels was more challenging. I had to: Secure the build by fixing a transversal beam throughout the structure Find mounting points for the side panels Here’s how it turned out: Finally, we come to the final assembly, revealing this beast in all its glory: You’ll notice that the mounting points for the original 42063 travel boxes are present, as well as a kickstand. The model is shown here on an external support, but this is obviously not mandatory—the bike stands perfectly fine on its kickstand. So, So, So That’s it for the first MOC of 2025! I hope you like it. I’m particularly interested in hearing your thoughts and comments on this one. Cheers, S.
  5. Hi! I am happy you could finalize this one. I love al the functions and, as ususual but worth to be repeat, your clean and eyes catching building skill. Happy new year !
  6. A mechanical technic part sorter?
  7. Looking at the rb détail I can see that the engine camshaft is in the same alignement than the différential's output. This mean that there is no gearbox at all, only the possibility to connect or not the energy recovery system.
  8. Doesn't the v4s have à rear mono arm?
  9. You should use my gearbox design on my katana I désigner on previously contest. Its compact... Keep on this good job!
  10. Hello! IMHO, the engine design is credible! Doesnt the radial engines of oltimer airplane have cylindres pointing to the ground? The one thing for me on your WIP is the saddle's hight that seems a bit too high . Have you any blue prints for comparaison?
  11. I also received l'y prize. Thx at Jim and Milan again.
  12. hello! This system works well in technic models too ;) impossible to steer such shortened wheelarches without virtual pivot (or proper rims, but that's another story)
  13. A BIG thanks to all of you who voted for my build in this contest! See you soon...
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