[rcannon]

It is more highly stressed than a car....If you do the math, the engine in this bike would be like a Honda Civic, the base model , making @300 hp vs the cars claimed 148 (1996cc) . BUT, the motorcycle does a lot less work than the car being its so light.

However, if you look up high millage fz1, there are several fz1 at well over 100,00 miles. I know there is a lady on the z 100sx forum with 70k on her 2011 ninja 1000.

If you ever visit a motorcycle boneyard, 99% of the bikes you see there are crash damage. Rarely, if ever, will you see something in perfect shape with a bad motor.

Most parts in the engine are designed to a factor of 6. That menacing "six times stronger than needed" No doubt the line gets pushed closer on a zx10r (440lbs) vs a ninja 1000 (500lbs).

In many ways, we luck out because a piece of crap like a Dodge neon just cant be produced. A locked up engine might up the wheels. No big deal in a car, big deal in a motorcycle.

Some of the honda v4 engiens had oiling issues way back in the 80's. Otherwise, you just dont see issues popping up, ever. Some transmission issues, for sure, but they are all fixable.

So, sure. You could have the one motor that wont see 70,000, but highly unlikley.