whats worked for me is to crack the bleeder and use your thumb (free) to cover hole on bleeder. pump twice and hold lever against handlebars and remove thumb. put thumb back over hole and release brake lever. then pump again and repeat. if you dont start getting anything in 10-15 trys u need to bleed master cylinder. remove the banjo bolt and line and do the same thing with thumb only hold it over the banjo bolt hole. you should be able to get enough pressure to feel it on your finger. hurry up and put banjo bolt and line back on and go back to the caliper bleeding
this is a very crude way to do it but i have had it work many times. now i use a pneumatic vacuum bleeder like the other guys are suggesting but i do enough brakework to justify the purchase. can't remember exactly but i think i paid 20 or 30 for mine through harbor freight tools but its probably 50 at napa. i think they also carry a hand vacuum pump set up for like 10 and it works well also
Trikes: All Honda: 84 250r, 85 86 and 87 250sx, 84 and 85 125m, 79 82 84 and 85 110's, 73 us 90 and 77 atc90, 75 atc70
Cycles: Honda: 71 cb100, 78 cb750 coming soon cb750 trike. Yamaha: 67 yds 3 (250cc, 2cyl, 2 stroke), 82 750 SECA
Other toys: Chenoweth VW sandrail dune buggy, old race go kart, racing mower, 76 Arctic Cat Pantera 440 snowmobile
KEEP IT ON ALL 3 OR AT LEAST 2 AT A TIME