Motorcycle Repair: front brakes weak, 650 v strom, bleeder valve

Question
QUESTION: When I bought the bike in Jan., I had some concerns. A new one I checked out had nice solid brakes, but this one felt mushy, and late to really grab. I had stainless lines installed. They helped, but the excessive lever travel remains. I am thinking a small bubble in the master-cylinder, but I don't know how to fix it. Any help would be appreciated, thanks.
ANSWER: What year and model?
Mike

---------- FOLLOW-UP ----------

QUESTION: For what difference it makes?? Brakes are brakes,no? 650 V-Strom 04

Answer
Change the brake fluid first and bleed the system. the brake fluid might gottem old or you have air in the lines. On the barke caliber there is a bleeder valve. Pump the brakes up and holding the brake lever crack the bleeder. Brake fluid will come out. Keep doing this until you get new fluid out.
SInce I only work on Harleys you will have to check with the manufacture on what fluid to use.

Good luck and happy riding
Mike