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Hey guys my name is lance! Ill try to make this brief.bought 2009 big red from nephew 600 miles well taken care of.he lost manuals so i changed oil with conventional oil.noticed intermittent slip going in gear cold so i got on forum.learned the whole wet clutch j a s o ma type stuff and understand.but some seemed to have trouble with wrong weight (oil pump)(clutch slip)or both?i doubt i did harm as no more than an hour use.i had trouble with this page loading it kept kicking off.in mean time im on bob the oil guy (power sports forum)asking about oil advice.so i run in town i find several brands 4t 10w40? And lucas full synthetic 10w30 j a s o ma 2?one guy said dont use lucas,no one said yay or nay synthetic,and very vague about what weight.i have a power sports shop opens at 430 i can check there.i have correct filter for change.i want to change oil and use honda! But not do any damage.so i finally got page to load so figured i could get some good advice here.btw mostall the oil i found is synthetic if i use should i buy flush and run before oil change to wash cconventional oil? Not worry? Thank you in advance!