ABSThis is a strange Lights flash at high revs. 1999 r1100r

[wells01]

This is a strange one. The ABS system works fine unless I rev the engine to 5000rpm or above. At this point the abs lights flash alternately at about 1htz and ABS is disabled. Turning the ignition off and back on resets everything to normal. I have checked the air gaps on the wheel sensors and the brake fluid levels. Any ideas?
Many thanks.

[Boxerpunk]

Charge or replace your battery