It would seem that California's mandatory seat belt law excludes motorcycles - this is a cut and paste from CA code section 27315
"(b) This section shall be known and may be cited as the Motor Vehicle Safety Act.
(c) (1) As used in this section, “motor vehicle” means a passenger vehicle, a motortruck, or a truck tractor, but does not include a motorcycle."
I would never feel safe riding/driving without being secured in my Slingshot, But if I am not required to use the belts I would think I would be allowed to change them. I really dont like the way the stock shoulder strap runs from the inside down to the outside I don't think it adds much to my safety and it does get uncomfortable when it is really hot outside which living here is most of the time. As such I would like to replace the stock belt with a simple lap belt. Has anyone here done this without going to a full race harness? If you have done this do you have a link to the belt you bought and any installation pointers?