I also had a problem with crimping. Since the carb that shipped on my bike was defective I had to remove it and the airbox then replace it with an aftermarket manifold and carb. At that point I noticed the intake hose on the airbox was almost completely pinched off by the coil wire.
Any bike made from the big 4 and in good condition would be much better than these clones. But a Ninja 250 is kind of, ah, not as good of a beginner bike as you may think.
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