Originally Posted by
1995 Monster T
During break-in the fuel you used didn't have enough oil lube. which caused poor break-in and damage to the engine bearings. Recommended oil lube is 14-18%
Although i cannot rule out the fact that break in on this engine may not have been at the most optimal fuel mixture due to the front bearing always leaking more than i would like to see from the factory, my fuel has 15% oil content and is marketed more towards reliability and engine longevity rather than outright performance.
Therefore if break in caused the rear bearing to be less than perfect and make noise, i would attribute it to the front bearing leaking during break in causing a slightly too lean mixture rather than my fuel oil content