Wed Mar 5 15:55:56 1997
- Message No. 480
From: Jorn Ronnow
Subject: Re: FW: Shooting / Valves
At 09:01 97-03-05 +0000, Pierre wrote:
>Eh, by the way, the AT has also four valves (per cylinder), thus total is
>8 !!
Sorry, but it's only 3 valves per cylinder. I'm not writing this to correct
anyone, but because it reminded me about another question:
Any theory on the history behind the three valves?
In the beginning (1983), there was the shaft drive, air cooled, 3 valve XLV
750. Everybody expected it to show up in Paris-Dakar, but it didn't. 1986
there was the gorgius NXR 750, 4 valve, water cooled and no shaft drive.
When the "replica" hit the streets, we were back to three valves again. It
seems the @ engine is very much a water cooled XLV 750 with chain drive.
Also, the power is the same on paper, but I've heard that the XLV had more
low end grunt than the XRV 750. Makes you wonder what happened sine 1983,
doesn't it?
And the four sparks? I bought two plugs for my @, changed them and took a
look in a bike magazine. By chance, they wrote about the @, and mentioned
the FOUR plugs. I rushed out to the bike again and stared at the engine.
There they were, the two extra plugs, almost invisible... :-)
Keep sliding
-Jorn
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