How can I bleed the front disc brakes on a Jonway 125cc motercycle?

ok in this order.
1,open the master cylinder resevoir cap and make sure it pretty well to the top with brake fluid
2'get a bottle or an empty coke can and feeed a length of pipe preferably clear through the pull tab on the can and into the can i do this sometimes it works well and stays put
3'put the other end of the pipe on the bleed nipple on the brake caliper.
4' pump the brake lever about 5 times and hold the lever in then undo the bleed nipple 1/2 to 3/4 a turn
5,do the nipple back up and repeat the sequence
so pumping the lever again..........
all the time make sure the fluid does not run out in the resevoir.sometimes if the brake lines are totally full of air then you need to tickle the brake lever to get the bubbles out from the top before you can start with the above procedure and also sometimes you need to clamp the brake hose just after the master cylinder to see if you can get pressure there in case you cant as if you cant then the master cylinder seals may be either damaged or reversed.if so then fit a repair kit to it and then bleed it.dont use old fluid only new stuff and DONT shake before use !!!keep it bubble free.

adam bike doctor
February 2010