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Discussion Starter · #1 · (Edited)
lite knocking sound

1997 zx11. how can you tell if #3 is bad. bike has good power but it has a lite knock. run good fast but has that sound.got motor from junk yard and just put it in the bike. so have not took out for a good ride yet.so is there a sound. or do they all have that sound. need help guys.
 

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Does the 'knock' begin at around 3,000 revs, under light load? If so, my guess is a big end [ connecting rod ] bearing with excessive clearance...and if that's the case, the potential for catastropic motor failure is enormous. Have it checked by a competent tech to be sure...
 
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