I read this post and want to help, along with everyone else. Here's my two cents, for what it's worth:
If you do all the macho stuff like martial arts, haven't you noticed that some practitioners get more spiritual over time? eg: The main character in the movie 'Road House' played by Patrick Swayze. In other movies too, hair gets longer, bandanas get worn etc.. all fitting in with your biker image no problem.
I got away with ( and still do ) all of that + a more Goth take on the rocker look - dyed hair, earrings, guy-liner, painted nails, boots with heels, women's jeans, unisex t-shirts/tops etc... I've even worn my hair in a ponytail, pigtails and braids. Nobody cares if you're wearing a Guns'n'Roses [insert your fav band instead here] t-shirt. It all works under a rock/alt/goth/hippie image. It's almost like acceptable cross-dressing in plain sight.
You could try some of that, it might lessen the dysphoria?
Personally, I could have rode that train forever, but it wasn't enough for me. I'm clearing the ground to go further and transition in the future if I still feel a strong urge to do so. I reckon it will be there, no matter if I resist, don't resist or try to ignore it. But having the rocker image for decades now, it won't be that big a step when it happens and people won't be that shocked. It might be only adding stockings, a skirt, and full-on make-up, at the end of the day.
I hope it all works out for you ;-) xx