If you want to look completely unprofessional and like you just don't care, then yes, ride your motorcycle to meet clients. If you want to look like you're prepared and care about what you're doing, you should probably arrive nicely dressed and in an automobile. Just my opinion of course! 
Also, I have no idea what you do or if it would be appropriate, the fact you asked means that it must be possible but I wouldn't recommend it unless you're selling bike stuff.

Also, I have no idea what you do or if it would be appropriate, the fact you asked means that it must be possible but I wouldn't recommend it unless you're selling bike stuff.