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Who made the first 4 valve Cycl. head??

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Was it:

Honda

Rudge

Ducati

Norton

Can any of you guys help me out with this one? I'm taking a motorcycle safety course for cheaper insurance, and this is one of the bonus questions. Thanx a bunch

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I can't say for sure, but I owned a 1980 CB750f, and 4 valve heads were all new....I can't remember whether Ducati had them before that, but wouldn't be surprised.

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Did a quick seach and found a artical about Honda's RC110, 50cc works road racer. It had 4 valve. It was built in 1962. Pretty wild unit. First version turn 13500 RPMs. The second turned 16000 RPMs. With a top speed of 90 MPH.

Although it is not in your list. Harley Davidson built a DOHC V twin, 4 valve bike in 1920.

http://www.popularmechanics.com/automotive/motor_cycles/1268606.html

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Well, thanks for the info guys! I am temped to think its Ducati or Norton, they have both been around for a long time too, and I have never heard of Rudge. Maybe I will go with Norton...what do you think, good guess?

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Well, you could do what I did. Google "Rudge" and you will find the answer to your question. Very few jap bikes feature breakthrough engineering feats, they just improve (alot) ideas thought up years ago. :naughty:http://www.rudge.co.uk/index.php?module=ContentExpress&func=display&ceid=2&bid=18&btitle=Welcome...&meid=5

Oh, thanks for this great site I am glad I coulld contribute something on my first post.

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