Author Topic: The MechaniK (Read 50217 times)

Roland · « **Reply #100 on:** March 23, 2018, 11:52:32 AM »

yes the amount of money spent so far. just wondering what an amazing build like this costs.

prakash · « **Reply #101 on:** March 29, 2018, 06:43:05 PM »

This build of yours is a true beauty and an engineering inspiration to all bikers who want something unique. Best of luck for rest of your build. Cannot wait to see the final outcome.

Gabi Nicolae · « **Reply #102 on:** May 13, 2018, 09:33:42 AM »

Quote from: Roland on March 23, 2018, 11:52:32 AM

yes the amount of money spent so far. just wondering what an amazing build like this costs.

Sorry for not answering so far, I was really busy doing other custom stuff. The exact amount of money I spent so far, cash out of the pocket is 7281 eur. Plus 325 labor hours. I'm almost finishing the bike, but I still need about 4 working days - which I don't have...

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milq · « **Reply #103 on:** May 16, 2018, 02:00:05 AM »

I have to admit that I’m curious about the rear shock absorber specifications.

I have zero experience calculating spring pressures and such. Did you use a shock that is a ready-built part for a different machine? Or is it a custom unit?

Gabi Nicolae · « **Reply #104 on:** June 06, 2018, 04:53:34 AM »

Finally, first drive. Very happy with the result! :) Best chapter is the suspension, by far. Second, the geometry /drivability. The engine shall be fine tuned, as it's not running smoothly, but nothing which a vacuum tool can't fix :). Here you have some pics.

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Gabi Nicolae · « **Reply #105 on:** June 06, 2018, 04:55:20 AM »

And an YouTube link.

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Laitch · « **Reply #106 on:** June 06, 2018, 07:59:03 AM »

It seems like riding it attracts the police! :giggles Thanks for the upload.

DJEwen · « **Reply #107 on:** June 07, 2018, 04:39:11 PM »

Congratulations :riding:

Gabi Nicolae · « **Reply #108 on:** June 11, 2018, 04:27:18 AM »

And some pro photos.

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Joel_nl · « **Reply #109 on:** June 11, 2018, 06:08:00 AM »

Amazing build! one question though :)
Why did you choose to put the rigid part in the front, and the moving (triangle) in the back? It would seem to me the connection point in the front is a better fit given the rigid frame.

I've been planning something similar for my own BMW K75. Using most of the Yamaha Yzf R1 linkage, and a custom made frame mount. main difference i've been planning is (as mentioned above) to keep the moving parts close to the frame.

Gabi Nicolae · « **Reply #110 on:** June 11, 2018, 11:26:28 AM »

I like this pictures :)

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Gabi Nicolae · « **Reply #111 on:** June 11, 2018, 11:28:09 AM »

Quote from: Joel_nl on June 11, 2018, 06:08:00 AM

Amazing build! one question though :)
Why did you choose to put the rigid part in the front, and the moving (triangle) in the back? It would seem to me the connection point in the front is a better fit given the rigid frame.

I've been planning something similar for my own BMW K75. Using most of the Yamaha Yzf R1 linkage, and a custom made frame mount. main difference i've been planning is (as mentioned above) to keep the moving parts close to the frame.

Hi,

There are rotating points at the both sides, there is no fix part on this system... Or maybe I didn't got the idea you want to say?

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Joel_nl · « **Reply #112 on:** June 12, 2018, 07:12:43 AM »

I mean placing the brackets like this:

In my opinion, most of the force would meet in the front, closest to the frame. my idea of the setup would give you room to weld a bigger/stronger bracket to the frame instead of having to resort to re-use the treads on the back wheel.
On the back the setup would be a bit simpler than your setup allowing for a simpler bracket that would distribute the force more evenly.

But since you've build your setup, i would love to hear your thoughts :)
PS: sorry for the small image.

Laitch · « **Reply #113 on:** June 12, 2018, 09:06:38 AM »

Quote from: Joel_nl on June 12, 2018, 07:12:43 AM

PS: sorry for the small image.

Feel free to post another, larger image, Joel. It will be more helpful than your current submission and should be much less effort than designing and building successful a suspension system :2thumbup: .

Joel_nl · « **Reply #114 on:** June 12, 2018, 09:32:15 AM »

@Laitch, i know i should have created a larger version :) i just did it quickly to show Gabi how i think the linkage system could also work. (simply switching it around).

When i get cracking on my own project (hopefully starting next month) i'll do my own work-log. just wanted to hear Gabi's thoughts on my idea since he has some experience before i do my own CAD drawings instead of a crappy photoshop mockup :)

Joel_nl · « **Reply #115 on:** June 12, 2018, 09:48:33 AM »

I upscaled my crappy mockup and highlighted the 4 key parts. in red the bracket that mounts to the rear wheel, and the linkage that mounts to the frame
In yellow the dogbone and suspension. i hope this makes it a bit better to see.

PS: Editing posts is disabled in this forum?

Gabi Nicolae · « **Reply #116 on:** June 12, 2018, 09:55:44 AM »

It will not gonna work, for sure I would say... :))) Check the forces : when the wheel will go up, the fixed part on the diff will push against the shock. Fine. But the push/pull rod will follow the movement, so will rotate the triangles, which in turn will try to extend the shock. Which means you will have a shock that will move forward and backward, without being compressed or depressed.

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Laitch · « **Reply #117 on:** June 12, 2018, 10:17:38 AM »

Quote from: Joel_nl on June 12, 2018, 09:32:15 AM

@Laitch, i know i should have created a larger version :) i just did it quickly to show Gabi how i think the linkage system could also work.

More than Gabi is reviewing this forum. It's just a courtesy to others, Joel. You want a private discussion with him? Use personal messaging.

Regarding editing, you need to reach a certain post count but I don't know what that is. What I did was Preview my posts to correct them before submissions, but we all agree that accidents will happen.
:falldown:

Joel_nl · « **Reply #118 on:** June 12, 2018, 11:09:31 AM »

@Laitch, not sure if my posts are venturing in the personal discussion, please let me know if they do..

@Gabi, Thanks for you reply. I did a simple test in 3D and almost directly saw your point :) i changed it a bit;

Gabi Nicolae · « **Reply #119 on:** June 12, 2018, 11:43:03 AM »

Please take into the consideration the fact that the fixed part on the diff is not moving up and down straight, but it's rotating, having the center point at the gear box main bolts (where the rear transmission is bolted to the gear box). That will change your drawings a bit.

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Roland · « **Reply #120 on:** June 12, 2018, 05:18:52 PM »

As well as that. The rocker on the chassis side has to rotate and have bushings for the shock and linkage. The animation does not alow the linkages to rotate in the rocker. It would work your way and has been done before. Since the rocker is at a pivot point higher than the swingarm pivot the center of the wheel will travel in an ark so that it is constantly moving closer the the rocker pivot. The whole point of the rocket is to fix the ratio of movement so the shock actually compresses a distance enough to dampen the movement without having a crazy pressure setup. Hope this helps.

Gabi Nicolae · « **Reply #121 on:** August 16, 2018, 08:21:54 AM »

And few media articles on the build. One from Romania and one from Spain, for now.

https://www.motorbikemag.es/bmw-the-mechanik-una-k100-muy-especial/

https://motobikes.ro/stiri/custom-mechanic-inginerie-pasiune-obsesie

NickHeijman · « **Reply #122 on:** August 20, 2018, 11:15:08 AM »

Bravo !

What a build, looks absolutely fantastic.
Many many many custom parts and damn bro your CAD skills are of the hook !

Thumbs up for you build, fckn love it.

Have my own build, lookup the Hedgehog project with also the rearshock horizontal.
Posting some new pictures next week, would be glad if you can help me out a little on the pressure on the frame and read linkage/bolts.

Cheers,
Nick

zenitramnaes · « **Reply #123 on:** August 20, 2018, 11:48:01 AM »

So dope, congratulations on the build.

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Author Topic: The MechaniK (Read 50217 times)