I was talking to a friend today whose dad is pretty knowledgeable on bikes and he told me that there is a kit out for the 650 engines to turn them into 750's.  Apparently it is a spacer that you put between the lower half and top half of the engine thus increasing the cylinder depth.  I did a quick search online and came up with nothing on the subject.  Has anyone heard of this?  Very interested to find out.  Thanks again everyone.

Thats what I was thinking.  Not sure of details of the kit thats why Im trying to see if anyone else has heard of this.

dv8savagerider wrote on 04/24/11 at 17:57:03:

Not happy with a 650 ?  get a bigger bike.
Or if you are looking for speed get a 600 ninja.

they've already stroked this engine from a 400 to a 650.
Stroking it 750 would really cut down the rpm's.

might be ok for a high reving twin though.

Shortening the connecting rod will not give you a shorter stroke. One would have to shorten the crank to get a shorter stroke. Example- 1 hotrod 383 I have has 5.7 in rods, my other 383 has 6 inch rods. The stroke on both engines is 3.75 and the bore is 4.030. Also, a shorter stroke gives less, not more cc’s. Shortening the stroke (de-stroking) can only be done with a shorter crank. Rod length does not affect discplacement contrary to popular belief.

Don't forget, pie are square.

X h    

Serowbot wrote on 04/25/11 at 10:55:00:


Depends on the cake.  

Railroad tracks.

The  US standard railroad gauge (distance between the rails) is 4 feet, 8.5 inches. That's an exceedingly odd number.

Why was that gauge used?  Because that's the way they built them in England, and English expatriates designed the US railroads.

Why did the English build them like that? Because the first rail lines were built by the same people who built the pre-railroad tramways, and that's the gauge they used.

Why did 'they' use that gauge then?

Because the people who built the tramways used the same jigs and tools that they had used for building wagons, which used that wheel spacing.

Why did the wagons have that particular  odd wheel spacing?  

Well, if they tried to use any other spacing, the wagon wheels would break on some of the old, long distance roads in  England , because that's the spacing of the wheel ruts.  

So who built those old rutted roads?  

Imperial Rome built the first long distance roads in Europe (including England) for their legions. Those roads have been used ever since.

And the ruts in the roads?  Roman war chariots formed the initial ruts, which everyone else had to match for fear of destroying their wagon wheels.  

Since the chariots were made for Imperial Rome, they were all alike in the matter of wheel spacing. Therefore, the United States standard railroad gauge of 4 feet, 8.5 inches is derived from the original specifications for an Imperial Roman war chariot.  In other words, bureaucracies live forever.  

So the next time you are handed a specification/procedure/process, and wonder, 'What horse's ass came up with this?'  you may be exactly right!

Imperial Roman army chariots were made just wide enough to accommodate the rear ends of two war horses. (Two horses' asses.)  

Now, the twist to the story:  

When you see a Space Shuttle sitting on its launch pad, you will notice that there are two big booster rockets attached to the sides of the main fuel tank. These are solid rocket boosters, or SRBs. The SRBs are made by Thiokol at their factory in Utah ..

The engineers who designed the SRBs would have preferred to make them a bit larger, but the SRBs had to be shipped by train from the factory to the launch site. The railroad line from the factory happens to run through a tunnel in the mountains, and the SRBs had to fit through that tunnel. The tunnel is slightly wider than the railroad track, and the railroad track, as you now know, is about as wide as two horses' behinds.  

So, a major Space Shuttle design feature  of what is arguably the world's most advanced transportation system was determined over two thousand years ago by the width of a horse's ass. And you thought being a horse's ass wasn't important?  

So, Horse's Asses control almost everything...  

...Explains a whole lot of things,  doesn't it?