(newmill @ Jun. 26 2007,14:19) No engine, exhaust, lighting or safety equipment modifications are allowed
under the law. These laws are currently unenforced in any predictable manner. If your stopped for some moving violation you may get a "fix-it" ticket if your being an a$$hat but that's about it....for now.
Several dealerships (HD) have paid HUGE fines for selling aftermarket exhausts that do not meet CAL/EPA standards and have ceased selling them. Ditto for power commanders, although I hear there is a CAL compliant Power Commander either in the works or now available.
You do not currently need to get your bike "smog'd" for registration. This will change with the 2008 model year in California and.....drum roll please.....nationwide in 2010 as the Federal EPA rules come into effect.
This is the reason the 49 state bike is about to become extinct (Ducati has been 50 state since 98) and most new bikes are already Euro3 compliant.....3 phase catalytic converter and all. Happy motoring
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