People seem to forget-when Suzuki was the official motorcycle of NHRA, they gave a half dozen pit bikes to the officials. When asked if they wanted to step up with sponsorship, they reply was (totally paraphrasing) that nothing modern of theirs was racing-so it would do nothing to boost sales. And this was when they had 100% of the class.
Love them or hate them ( and I certiantly don't love them) without HD, PS/B probably would have gone the way of M/P + PS/T.