On a trailblazer how does the crank get oil?????

 

On a 2 stroke, the fuel is mixed with oil. When the piston is on the compression/power stroke, the fuel/oil mixture is drawn into the crankcase. When the piston comes down(exhuast/intake), the mixture is pushed by the force of the piston up to the intake ports. The crankshaft is lubricated by the fuel/oil mixture.

Rainman

 

I have no idea about your specific engine, but on 'traditional' two strokes over about 20CC they use needle bearings for the top and bottom on the con rod, and needle or ball bearings on the sides, both set ups hold up very well if the enviroment is clean and an appropriate mix fuel is used, ( witness my still strong running and noisy 1962 johnson 7.5 outboard, although use has been typically light, maybe 20 hours a year. )