A few people have had same issues with this model (170cc). The lesser cc engines seem to last a bit longer. Like anything chinese it,s "pot luck" with quality.
I,ve got a Lifan 150, which has been a bargain for the money (£250)....3 years with no probs, then all of a sudden crank sheared on flywheel side. Got a new crank £38 from Germany.
Some people have had less than a week on some of their engines.

