Bought this 07 450er in February. Rode it a little bit (5 or so hours) and opened it to check valves. It’s got a gouge or groove in the cam lobe right in the center. It’s never been ran low on oil since I got it and had no issues. There is no signs of damage that I can see elsewhere on the roller or other lobes Except for a little wear maybe, but I have not pulled the cam tower and checked the buckets or anything out. I messaged the seller and he said it was old damage prior to rebuild and builder said use it, but he didn’t get into specifics. I’m a little worried about the cam and already have a 06 crf cam laying around. What do y’all think was the cause and should I change it out? Could it be something worse causing this or would I see more damage? Have no clue what to think. Thanks!
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