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MY 1970 CB350 has problems shifting when hot. I split my cases to inspect the tranny. I have never been in this deep so I do not know what to look for. Please look at my pics and let me know what you think. One thing I question is the swirl marks on the second to the right shift drum channel. The others do not have these. The shift fork pin for that channel shows no wear different from the others. They all look shiny and new. I think these swirl marks are actually original machining marks. Has anyone else seen these before? Another thing I question is the slight wear (rub marks) on outer shift forks shown in the second pic. Obviously something caused these surfaces to rub. Again let me know what you think. My current plan is to put it all back together with new clutch friction plates, clutch springs, gaskets, oil seals and Rotella T6 5W40 synthetic.
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