Welcome to tye site. If you take the air filter off, you will see a 3mm nut at the base of thr carb. Loses it with a nut driver or the included 4way. Rotate the carb and retighten the nut.
On a side note it must be old stock. I don't see any silver 2.5 engines. It's all the 2.5r. Same motor just a silver head.