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  1. R1 2003 stock correct valve timing which is which??

    02-03 R1 Mechanical Help
    Hi gents i am new to this forum. glad to know there is a platform for this specific bike. So a friend's R1 2003 came from a mechanic who changed the main bearing but after getting the bike it has an idle problem and the rpm needle keeps on bouncing. it sounds like the engine has random...