I think my VZ-R II need new rear bearing replacement asap. The engine noise become noticibly rough after returning from heat #3. The engine temp. was increasing strangely too ...... from 100 C after Heat #1, 105C after Heat #2, and 118C after Heat #3 ???

When the engine become noisy all of sudden, am I correct to assume the rear bearing is the culprit ?

I'm quite dissapointed with this engine ..... was used maybe only 1 hour max, and she already need a new rear bearing ???