1. Well I know that f1 cars are impossible to upgrade without there respective events so its stupid to hack them.
2.thanks for the tip will try that to avoid any potential ban.
3.I have found a solution to my problem did not fix it tho, as I told you that car I'd hack can damage the tuning menu and causes crash ,you first need to delete any cached data that takes storage in your phone and either restart your phone or use any memory cleaner like clean master to close any app that is taking unnecessary memory from your ram, now this is important open the game and go in your mastery of Bentley continental gt v8 and try to do in its tuning menu it works 100% with this car for some reason now you can access any cars tuning menu and the game will not crash as frequent before the above method you can do this in the collection menu with the same car but mastery is better ,and events like r&d won't let me upgraded the car or bike unless you use my method @Enyby please tell the people this method who also have the same problem this can save there account but you have to do it every time when you want to upgrade. P.s @Enyby can you tell me the r&d I'd for Suzuki hayabush