Discussion document raising concerns and offering proposals concerning motorcycle ABS testing.

Proposal to delete passages under paragraph 3.1.15.2. referring to the “prediction of the vehicle deceleration” since no method for doing so is described in the regulation. Moreover, in a self-certification system, the requirement would have to be met for the actual vehicle deceleration. The proposal also substitutes switching between ABS modes for the terms “disable” and “deactivate” for greater clarity. Lastly, the proposal recommends the use of a clearly specified telltale design to signal the ABS operating status rather than to leave this function open to “…any other equivalent unequivocal indication of the disabled antilock brake system state.”

Proposal to

1. delete paragraph 3.1.15.3 as it is an unnecessary provision under self-certification systems and addresses deceleration measurement criteria referenced elsewhere in the regulation
2. clarify that the ABS tell-tale must be yellow
3. delete the prohibition on defeat devices due to the absence of objective and repeatable procedures for assess conformity necessary under self-certification.