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**aargee** · 02-24-2010, 11:50 AM

Yes, this is a good website; I couldn't understand much about the single pin HD's crank until I went through their animation.

**L.P.** · 02-24-2010, 11:52 AM

FABULOUS Work Sir,
after seeing that video One can actually understand how an engine works,

But honestly it was at times too difficult to monitor both of them working simultaneously.And after you click on that play button again and again, you see diff phases and work around in an engine.
and in the end only leaves 2 pistons hanging anf running in the air.

Brilliant stuff sir.

**aargee** · 02-24-2010, 11:55 AM

Originally posted by L.P. View Post

after seeing that video One can actually understand how an engine works,

But that's only for the HD's. Other V-Twin have two pin crankshaft, like you see for the boxter, but vertically instead of horizontally; Also not all the motorcycles have this type of single pin crankshaft; I'm aware of only two motorcycles - one is all HDs & other one Yamaha Roadstar.

Another link on Single Pin Cranks related to HD's VTwin
http://home.cogeco.ca/~rwbaxter/The%20V-Twin.htm

**nirav46** · 02-24-2010, 01:59 PM

Brilliant for newbies to learn about engines

**Old Fox** · 02-24-2010, 04:18 PM

Thanks LP and nirav46

Originally posted by aargee View Post

But that's only for the HD's. Other V-Twin have two pin crankshaft, like you see for the boxter, but vertically instead of horizontally; Also not all the motorcycles have this type of single pin crankshaft; I'm aware of only two motorcycles - one is all HDs & other one Yamaha Roadstar.

Another link on Single Pin Cranks related to HD's VTwin
http://home.cogeco.ca/~rwbaxter/The%20V-Twin.htm

Nice link there @aargee.

You are right about the 'single-pin' crank being almost unique to the HD's. The Boxter's horizontally opposed is also in a way a V-Twin...but with an included angle of 180 deg. The letter V no longer applies but there's quite a lot common in the engineering.

The animation here has even included the 'wasted spark' thing...which is commendable. The web-site owners are developing similar screen-savers for other configurations too. Will be fun watching a flat six in action on screen

.

**aargee** · 02-24-2010, 04:36 PM

Originally posted by Old Fox View Post

The animation here has even included the 'wasted spark' thing...which is commendable.

Would like to give you a piece of information - HD has resolved this wasted spark problem ever after they moved into fuel injection model; the firing now happens only after the compression stroke on each of the cylinders to match the 315/405 angles of firing.

**indian07_blood** · 02-24-2010, 07:32 PM

I wish my lecturers use such a great method to make us understand what they are really want to say

..Awesome OF sir ..Now, I was wondering how clutch and gears work

..Thanks for sharing your knowledge..

**gsferrari** · 02-24-2010, 07:44 PM

Superb stuff OF-Bhai. Running them as my screensavers now!

**Old Fox** · 02-24-2010, 07:50 PM

Originally posted by aargee View Post

Would like to give you a piece of information - HD has resolved this wasted spark problem ever after they moved into fuel injection model; the firing now happens only after the compression stroke on each of the cylinders to match the 315/405 angles of firing.

That they have but yet again something tangible has been lost in the process. The wasted spark would burn the residual mixture still floating unburnt in the exhaust gases as they escaped the cylinder. The sound added to the V-Twin magic I must say. FI is crisp, technically 'right' and reliable...yes. But compare a Kodachrome image with a digital shot

. Thats the difference. And as an after-thought..the 'wasted spark' was never a problem actually, just an imperfection.

Originally posted by indian07_blood View Post

I wish my lecturers use such a great method to make us understand what they are really want to say

..Awesome OF sir ..Now, I was wondering how clutch and gears work

..Thanks for sharing your knowledge..

Thanks..and as for the clutch and gears, the search is on!

GS: Thanks!

**petrolhead22** · 02-24-2010, 10:56 PM

Originally posted by Old Fox View Post

Hi!

Came across this web-site that has excellent animations of some popular motorcycle engine configurations, namely the V-Twin and the Boxer Twin that can also be downloaded as screen-savers. The detailing is impressive and those who want to get a visual picture of what goes inside their engine can get a pretty good one here. For comparison, The Enfield Bullet engine is a push-rod actuated overhead cam engine just like the Evo and the Twin Cam below, the difference being that it is single cylinder. So go ahead and install these screen-savers....they'll give you something interesting to watch while you stare at the monitor and mull over a problem

.

This one shows the Harley Davidson Evo series, an air-cooled 45 deg Twin
AnimatedPiston Animated Piston Evo Engine - Animated Motorcycle Engines

This is the Twin Cam successor to the Evo
AnimatedPiston Animated Piston Twin Cam Engine Screensaver - Animated Motorcycle Engines

And this is for the classic BMW Boxer Twin. Some variant of this engine has been in production since early 1920's.
Animated Piston BMW motorcycle engine animation by Peter Liversidge

Wonderful animations Old Fox sir! It is a great way to learn the thermodynamics of motorcycles!!

**aargee** · 03-19-2010, 11:49 AM

Here's one to demonstrate Desmodromic valves that are used only by one manufacturer in this planet - Ducati

Ducatidesmo.com

http://www.ducatidesmo.com/valves.htm

**Parth** · 03-19-2010, 10:59 PM

Interesting stuff........would like to know more about the single cylinders that are used on indian bikes to have more practical knowledge

**aargee** · 03-21-2010, 10:24 AM

Check out this link - Animated Engines
@Parth - Most of the links here depict a single cylinder model & when multiple cylinders are used you can imagine all the single cylinders working with each power stroke happening in each cylinder consecutively.

**aargee** · 09-18-2010, 10:38 AM

Came across this great video that helps understand how the energy is transmitted from Piston to rear wheel & how a V-Rod is assembled.

YouTube - Harley Motorcycles

Also another great video demonstrating the inner components of engine & shows how an engine works

- YouTube

http://www.youtube.com/watch?v=-aqqRCJDtrw&feature=related

Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

Here's another animation of how the lubrication system works in Ducati with Desmo valves

Ducati Desmosedici GP8 Engine Oil Lubrication Animation

http://www.youtube.com/watch?v=nWhqlcxwzxs&feature=related

From http://www.webBikeWorld.com , This is a Shell Advance press release with an interesting brief animation that illustrates how the Ducati GP8 MotoGP engin...

And another animation to show how a Desmo valves work

distribuzione desmodromica 2

http://www.youtube.com/watch?v=-rbQXKSXr70&feature=related

un altro simpatico video del nostro lavoretto per la ducati

Another good video to get the basics right

3D Engine Displacement Video - English units

http://www.youtube.com/watch?v=YtQ1ZAW8fFg&feature=related

A quick engine displacement lesson in 3D form.If you are a teacher using this in or for your class, please message me, I'd love to know if it was effective! ...

Though this is for a car, but gives a good insight on how firing takes place in multicylinder engine

- YouTube

http://www.youtube.com/watch?v=OXd1PlGur8M&feature=related

Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

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