"we're setup to make 10K SR/F right off the bat, but damn it if we can't crank out a single FXS or DS for the second 6 months of the year"
I remember reading this a few weeks ago in an interview with Abe Askenazi. I was surprised by the statement and remembered to enquire about it recently. It seems the real number is closer to 8,000 units a year but includes all models.
Therefore Zero's entire production capacity is around 8,000 motorcycles a year and they have to meet the demand for all models with that number.
I've been told by at least three Zero dealers here in the UK that just about all 2019 stock has sold through. As Richard speculated above, the vast majority of their manufacturing capacity has been given to building as many SRFs as they can to provide demo bikes to dealers and fulfill the existing customer orders. They just can't seem to make them quickly enough!
My guess is that Zero have banked on selling a lot of SRFs and ordered a healthy amount of parts to be able to build them throughout the next 12-15 months before the 2021 lineup is ready to go into production. I doubt they have extra parts available to continue making a significant number of 2019 models. They must be focusing on preparing the production line for 2020 versions of all the other models.
From what I've gathered, the only stock available is what can be found in dealers' showrooms. Some dealers are reluctant to sell their 2019 demo models because it will leave them nothing to offer prospective customers to test ride. Other dealers are happy to make a sale and would rather clear their stock and wait for the next model year to come through. A lot depends on how successful they've been selling bikes this year.
Forgive me for reiterating many of the comments already made above. I simply do this because they also chime with what I've learnt. It also helps me get it straight in my head.
Good for Zero as they're selling everything they make. Hopefully good for customers in the long term as they will be able to expand production and get better economies of scale.