Italian Technical Bike site

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Stuart
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Italian Technical Bike site

Post by Stuart »

Just surfed onto this site: http://www.dinamoto.it/index.html
For those with an interest in Motorcycle dynamics.
Some of the pictures don't come up though. But here' the original page on which the pics below are displayed.
http://tinyurl.com/ykzohk
The page is entitled Shaking Forces of Twin Engines by Vittore Cossalter. I guess the same forces are present in similarly configured diesels?
In the following examples, the blue arrow represents the first inertia force and the red one the second inertia force
Image
Aprilla
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BMW
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Ducati
Image
Moto Guzzi
Image
Honda Transalp
Image
Basic single
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Laverda 750
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Yamaha TDM 850
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Suzuki VX800, Intruder

Now we need one for the Neander bike :lol:
Stuart. M1030M1, Honda NC700S, Grom!, Toyota Corolla 1.4 Turbo Diesel. Favouring MPG over MPH.
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andrewaust
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Post by andrewaust »

Hi Stuart



Hay that is interesting to see how the cylinder angle and crank big end location make a difference - BMW get the prize by the looks of the pics.

Hay have a look at the basic single :lol: remind you of something :?:
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Stuart
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Remind

Post by Stuart »

Hmmm... :?: not sure. I must be having a slow one today, mate. Remind me :lol:
Stuart. M1030M1, Honda NC700S, Grom!, Toyota Corolla 1.4 Turbo Diesel. Favouring MPG over MPH.
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andrewaust
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Post by andrewaust »

When I looked at the inertia of the basic single I could see the likeliness of the diesel single in the Enfield. With the bike on the centre stand you can feel the bike vibrating the slab of concrete at home.

It appears the BMW has no blue or red arrow indicating it is very smooth running.
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Post by oilburner »

That's what hooked me on BMWs 39 years ago. Perfect primary balance, and a slight rocking couple due to the longitudinal offset of the big end journals.

I'm looking forward to Subaru's upcoming 4 cylinder turbo diesel boxer. Alas, it's too big for a motorcycle :(

Avery
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andrewaust
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Post by andrewaust »

Hi Avery


I always wanted to get my hands on a good Paris/Dakar replica 2cyl BMW, but always lost out :cry:

Everyone said how good they were for touring and more importantly hitting the national forest etc :wink:

Who knows, might see BMW develop a 2 cyl diesel :lol: there was talk of someone trying to convert a BMW boxer twin - don't know how they went - maybe Stuart might know some more.

How good woud that be - reasonable power and economy to match with a proven bike.


I'm sold :!:
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