I have a few questions about breaking in a new motor.
I know it's a matter of opinion on how to properly break a motor in but I'm looking for suggestions.
Do it by what Yamaha recommends or break it in like "ride it like you stole it" theory. :-\ I know to stay off the rev limiter and to let the motor slow you down instead of clutching it....what else would you recommend?
Another related question.....will a new motor run leaner and hotter (same thing I know)? The reason I ask is I rode it today after work and got on it a bit and it started breaking up in the upper RPM's. I was only in second gear mind you but it has always ran clean throughout the RPM's. Also, my coolant overflow bottle is saying it's at the normal level but I'm getting coolant out of the overflow tube itself...like it's pressurizing (sp) the bottle and forcing coolant out of the overflow tube. :-\ Not a whole lot but my last rebuild I never noticed this before. :-\
This rebuild I replaced the cylinder, piston, rings, gaskets, wrist pin and piston clips. I also cleaned up the valves while the head was off and checked the valve seals for leakage (found no leakage).