These issues could come back to haunt you in the long run if you don't get professional advice. You'll want an experienced eye to look at your arrangement to see whether 51/49 is really fair if you're putting in the money (so it seems), and your partner is putting in only sweat equity. In addition, depending on the capital you put in, there may be tax advantages to treating some of the money as a capital contribution and some as a loan -- so your tax advisor should also be on board to guide you.
Nina L. Kaufman, Esq. is an award-winning New York City attorney, edutainer and author. Under her Ask The Business Lawyer brand, she reaches thousands of entrepreneurs and small business owners with her legal services, professional speaking, information products, and LexAppeal weekly ezine. She also writes the Making It Legal blog.