Your 1998 rm 125 is not hitting power band wont kick off will only jump off and keeps getting very hot very quick its just had a new bottom end and new gaskets any ideas?

If your 1998 RM 125 isn't hitting the power band and is overheating quickly, there could be several issues to investigate. First, check the carburetor for proper jetting and ensure it's clean, as a clogged jet can hinder performance. Additionally, verify that the air filter is clean and that there are no exhaust blockages. Lastly, ensure the cooling system is functioning correctly, including checking the coolant level and inspecting the radiator for any obstructions.