Does anyone have any tips or warnings as to what I might encounter when I install the GYTR comp ECU on my WR450F. Should I disconnect the battery first? Will the map on the new ECU run with the standard exhaust set up and/or the FMF power core4 without any changes via a power tuner? Ordered the tuner but it won't be here for a week and I want to ride over the weekend. Any advice would be much appreciated.