Join Date: Oct 2018
Location: San Luis Obispo, CA, USA
When you say race ECU, did he take it to a shop and have it dyno tuned? If so I'd hang onto that map, otherwise it's exactly what everyone else has said. Grab a stock map & go.
Typically minor mods like just exhaust/slip-ons don't usually need to be remapped. If you did more radical changes (smog deletes, airbox enlarging/removal, cams, big bore, etc.) you'd want to tune it after. Most bikes will benefit from being Dyno'd by a pro, but the gains are a lot smaller with basic mods.
82 CM200T(Basket case), 04 DRZ 400SM (sold, best bike ever), 01 VFR800 (went kablooey), 09 Concours 14 (RIP - nobody needs coffee that badly), 15 Multistrada, 95 900SS