Just this morning I had the dreaded click after hitting the starter button. Too many short runs without enough recharge on the battery between cranks. Have previously done the wiring mod shortening the path from the battery to the r/r. Past experience says the battery voltage is probably at 12.4VDC, just below the ECU required 12.6VDC to engage the starter!
Just ordered a Ricks Motorsport Electric Hot Shot Series Rectifier/Regulator 10-004H myself.
FYI, the 10-004 is an OEM replacement and the 10-004H is the MOSFET upgrade.

edit: maybe a new (LiFePO4) battery is on the short list

Last edited by MattyMo; 10/12/2015 7:58 PM.