Stainless lines can be an absolute pig to bleed at times, but I've had other occasions when the lever has "come up" within about 30 seconds!

The last time I did mine was after fitting a new (CBR1000RR) radial master cylinder, and the lever started to come up within just a few pumps! Easiest I've ever experienced.

The OEM NSR Nissin master cylinder seems particularly prone to trapping air. It doesn't even always bleed easily if an HRC bleed bolt is fitted, but it certainly helps.
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Andy.
NSR-WORLD.COM

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