Hi all, Could use some ideas on a 2008 WR250R starting issue not resolved by ideas in any forum I’ve read. Had crashed pretty hard in May but the bike ran fine and I was able to ride it out. Started it a time or two between January and it ran fine for several minutes before I turned it off. Started right up in January and ran for about 10-15 seconds before dying. Unable to restart although would intermittently sputter a bit and maybe run for a second. Figured bad gas so drained and replaced. No change. New plug, gapped correctly. No change. Replaced fuel pump with a Quantum and regulator off a low mile parts bike. No change. New fuel injector. No change. No error codes in diag mode. All sensors test out correctly per the service manual. Pulled injector and see it spray when cranking. Good looking spark. Follow all the EFI checks on the Yamaha tech Youtube video and checks out. Previous owner put a PC V on it. I bypassed and no change. Have checked all obvious grounds and seem ok. New battery. With all that replaced, if I crank the bike with no throttle, get no hint of it wanting to turn over. If I hold the throttle wide open and crank, it will start to burble after 5-10 seconds. When that happens, I close the throttle and it will typically start and run for a couple of seconds before dying again. Guessing it’s too rich but can’t think of any obvious reason. Not much evidence of that on plug but hasn’t run enough to see if it turns black. Only other issue with the bike is it also has an IMS 4.7 gal tank that turns the gas dash light on even with a couple of gallons in it. Wouldn’t think anything in the ECU would be unhappy about that though. About to buy an ECU off EBay as I don’t know anybody in Livermore, CA with a WR to swap with to test. Appreciate any other ideas on what to check. Thanks!