There is sure nothing wrong with three bond, if you use it correctly. The stuff has been around forever. The problem, especially in four strokes, is that it is applied in excess and tend to plug up screens, lines, and oil jets.
I prefer Loctite 515 or 518, which is a non hardening anerobic sealer, designed for metal to metal sealing. The excess will not harden and will not cause any issues like three bond can. It still should be used sparingly. A super thin coat on one surface will do it.
It's also the factory recommended sealant for the KTM RFS motor.