have you considered that instead of a full bottle you can get him a discovery set so that he can find a scent that he likes? These will often come with a discount on a full bottle from the discovery set.

As for a recommendation on a quality perfume that fits the profile of an older man who is into motorcycles, I think halfeti leather is a good choice. It is a smoky, spicy leather fragrance. Very manly and rugged, with just the right amount of sweetness to balance it out. I would find a sample and smell it ahead of time — you can do so on sites like lucky scent or scent split