Until you take the side covers off any answers are just guessing as to whats going on . There are several things that can cause a knocking sound, physical examination is the only road left to fixing it , plus continuing to ride it may end up costing a ton more from more extensive damage . Oil should show some particles or something by now , drain it in a clean container and look closely .
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'86 XT600/3TB motor,,, '88 XT600, ,,'92 XT600e,,, '08 Husky TE510,,, '05 DRZ463,,, '95 KLX650 ,,,'96 KLX650
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