Crammers glowed while running warm

Hello, I throttled my SV650 S bj 02, 34 Ps, together with an experienced buddy, from hibernation. There were some problems at first, she just wanted to jump on ni. After several attempts it worked out nevertheless, put up zünkerzen and screwed in used ones, then finally worked. Now to the problem: When we let them run a few minutes, the front Krummerroh glowed fire red. We let them run about 5 min. and let them tour up several times n, until approx. 6000 u/min. Is that normal? I never took care of it otherwise. Thanks in advance.