Why a timing chain instead of timing gears?

#13

07-08-2005, 11:41 AM

Scott98

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Join Date: Aug 2003

Location: Weston, FL

Posts: 1,254

Quote:

Originally Posted by lrg

Not positive but I think the bike you're thinking of is a Ducati. Not only do they have gear driven cams but the valves have two set of rockers, one that opens and one that closes the valve. No conventional valve springs. As the Brits say, it's a neat bit of kit. In that case though the engine, cams, etc. are quite a bit smaller than on a car so I think it's easier to get away with. Also, bikes don't have to worry about the emissions constraints quite so much.

It completely eliminates the chance for valve float. Makes the valves difficult to adjust though. I tried it once and couldn't figure it out. It's very easy on my Mercedes however..

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
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1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
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