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Spyder's have a dry sump system which is very different than 'conventional' systems.

A big advantage is that the CoG is much lower because there is no wet sump under the engine. Another is more oil can be used because the auxiliary tank can be larger than a sump so the engine has more oil. The downside is added cost and complexity - and confusion on how to check the oil. What often happens is that the the oil is checked as if it were a wet sump, it is thought to be low and then gets overfilled.

Some older bikes used a dry sump. The older Porsche 911 (and maybe newer ones?) is also a dry sump and has exactly the same procedure for checking the oil -- and it has 12 quarts of oil, making it effectively an oil-cooled engine.

<http://en.wikipedia.org/wiki/Dry_sump>

Rod.
 
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