CBR 600F4 1999 - 2000 Honda CBR 600F4 Forum

F4 Main bearings! Rattle on deacceleration

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  #11  
Old 12-09-2013, 11:16 PM
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Originally Posted by sodahyogesh
hey i saw couple of sites where it mentions 003 is superseded by J21.

here are the sites

https://www.motorcyclespareparts.eu/...px?pagesize=20

(91021mbwj21) Brg,needle 30x41x Honda - 91021MBW003 91021-MBW-003
If it's worth $12 to you to take a guess, then go for it. It just might work.
 
  #12  
Old 12-09-2013, 11:25 PM
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Originally Posted by 74demon
If it's worth $12 to you to take a guess, then go for it. It just might work.
J21 is costing #28 with shipping to TX 78558 and 003 is coming upto $39
 
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Old 12-10-2013, 04:50 PM
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Hey,

Have you decided it's the bearings?

When you pull the rocker cover have a look over the cam shafts and followers for signs of scoring. My motor made a distinctive rattle on decelaration and that was the cause. Replaced the cylinder head assembly with used parts and now the noise has gone!
 
  #14  
Old 12-11-2013, 02:54 AM
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Yes so far sticking on the bearings! Replacing the head in India is totally out of question and haven't opened the head yet. Gathering the parts now and once everything is in hand will open up.
 
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