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I put together a new set up this year with a 2019 YZ450F, I've installed a FMF Megabomb Header and the GYTR slip on to the bike as well as a C3 intake. My buddy has an identical bike but being an 2018. He recently installed the CR racing intake onto his bike (stock exhaust still) and then seized the piston first ride out. The shop said the engine seized from running too lean due to the intake being installed. He also hasnt messed with his mappings at all. This makes me wonder and also concerned about my current set up. I Haven't touched any of the mapping on the bike, everything in the ECU is factory. Does any one have any leads or ideas as to what i should put these parameters at? or go with an upgraded ECU such as the PR2?
![20191217_123120[1].jpg 20191217_123120[1].jpg](https://www.snowest.com/forum/data/attachments/281/281623-b998a051d673b9aa6802b764b3c5b793.jpg?hash=uZigUdZzua)
![20191217_123120[1].jpg 20191217_123120[1].jpg](https://www.snowest.com/forum/data/attachments/281/281623-b998a051d673b9aa6802b764b3c5b793.jpg?hash=uZigUdZzua)