Polestar
Wizard
Yamaha should stand behind that regardless of warranty. That is an obvious factory defect that could have put you in danger. Threaten a law suit.
Ditto!
Unless you opted for the weld repair, at Yamaha's expense, I'd demand- with threat of legal action if necessary-a new frame. Yamaha certainly understands its much less expensive for them to replace a frame, than loose sales due to bad pub and or loss of life due to a manufactureing defect. Frames aren't supposed to crack and it's a known issue.
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