Had the 225DX out yesterday, and I'm getting quite a lot of noise from the engine. It's rattle-y and I'm thinking it must be the timing chain. I get a little intimidated by engine internals, so I was wondering how big a job this is? I know that's pretty subjective, depends on the person, but I'd like to hear from anyone who's done it. Do I have to replace sprockets, chain guides, tensioner, etc? Just looking for recommendations.



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