Hi mates.

I had for many years in my pc many photos from a complete engine rebuilt that took place at the Honda museum if i remember correct.

The photos are from THE most amazing GP machine ever; the NSR500 V4.

So I thought that would be nice to share them with the NSR community as many here would be very interesting to take a look inside the beast

So here it is, I hope all of you to enjoy it.

What i did wrong and the photos don't appear?
Please someone fix it

Fixed... and SUPERB!!!!!

Thank you for sharing!
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Andy.
NSR-WORLD.COM

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Thanks Andy
I hope you all enjoyed those pieces of art engineering at the photos.

That is the bollox.
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If I have to take the carbs off once more...

Those pics are amazing.
Pardon my ignorance, but I thought all of the V4 NSR's were single crank?

Well, yeah that might of been a little lie.

The cranks lie on the same axis but they aren't a single crank. If I recall though they did a number with a one piece centre gear making those a single crank.

As a note, I don't ever recall Honda claiming or stating it was a single crank, more the press.
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If I have to take the carbs off once more...

I never heard for a single crank on a V4 NSR.
As i know all of them have two cranks with the same design like this in the photos.
A think that i remember and impressed me when i saw it,was that the NSR500 V4 after 1989 models as it is this in the photos has a specific design on the cylinders to prevent more coolant after some problems with the temperatures.
This design almost doubled the coolant amount of the cylinder and the head studs actually been outside of the cylinder.
If you are interesting i may have a drawing of it somewhere in my pc folders,just let me know to search for it.

As seen here.

http://www.youtube.com/watch?v=XMSK7-dgYhs

The earlier NSR500 V4 had almost MC16/18 style barrels.
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If I have to take the carbs off once more...

Yes Stephen as you said pre 90 models had a simmilar design whith mc16-mc18 but they had problems with temperatures and after they made this design with displaced cylinder studs to prevent more coolant.
http://img152.imageshack.us/img152/4600/nsr500v436.jpg
I have also a video with some minutes inside the 1988 HRC production erea with lots of terra (NSR250-NSR500)beauties inside,take a look after 1:14 http://www.youtube.com/watch?v=ldTwmeqEqVQ&feature=relmfu

stefanos-MC28 wrote:
take a look after 1:14 http://www.youtube.com/watch?v=ldTwmeqEqVQ&feature=relmfu

And at 0:30... You just know Mr. HRC is chuckling inside!

He launches that SEED off the line! Unfortunately it looked like he launched it into the tyres just before the end, too!
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Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.

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Andy wrote:

stefanos-MC28 wrote:
take a look after 1:14 http://www.youtube.com/watch?v=ldTwmeqEqVQ&feature=relmfu

And at 0:30... You just know Mr. HRC is chuckling inside!

He launches that SEED off the line! Unfortunately it looked like he launched it into the tyres just before the end, too!

I like the way he goes the other teams working area at the pits,he looks like a spy

StephenRC45 wrote:Well, yeah that might of been a little lie.

The cranks lie on the same axis but they aren't a single crank. If I recall though they did a number with a one piece centre gear making those a single crank.

As a note, I don't ever recall Honda claiming or stating it was a single crank, more the press.

Ahhhh, it all becomes clear now.
Twin contra-rotating cranks on the YZR500 (also RGV and Cagiva 500's?).
Twin cranks on the NSR rotating in the same direction.

Those are great video's Stephanos.

StephenRC45 wrote:Well, yeah that might of been a little lie.

The cranks lie on the same axis but they aren't a single crank. If I recall though they did a number with a one piece centre gear making those a single crank.

As a note, I don't ever recall Honda claiming or stating it was a single crank, more the press.

Yep, the NSR500 is a true V4. Not an oblique square 4 with 2 "proper" full width cranks counter rotating to balance the rotational forces like a YZR500.

This is an RD500, but it shows the idea of a twin cranked "V4" (it's not a V is it?) clearly.

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