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Honda FireBlade Discussion of the Honda CBR 900RR, Honda CBR 929RR, Honda CBR 954RR, and Honda CBR 1000RR Motorcycles.

Thread: need help with knocking noise Reply to Thread
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  Topic Review (Newest First)
10-18-2008 6:38 AM
bladeracer
Re: need help with knocking noise

I see your point.
If he means he ran low on oil at 180mph then the crank is probably not good :-)
10-18-2008 6:24 AM
SevenStar1000RR
Re: need help with knocking noise

That is correct i should have been more spec when I posted how ever unles i read his post wrong toing 18 and the slowing down and hearing the knock probably isn't a good way to find it. Regardless if you do take it apart have I would have a machine shop check it before replacing anything.
10-18-2008 5:47 AM
bladeracer
Re: need help with knocking noise

This is not strictly correct.
You can spin a rod bearing without damaging the crank at all if you catch it quickly enough.
If the bearing clearance has opened up enough to hear the knocking then it's likely the crank is damaged but there are several repair options before you need to replace the crank.
Regardless of how you fix it you must measure up the oil clearances during reassembly.
10-18-2008 5:29 AM
SevenStar1000RR
Re: need help with knocking noise

If you spun a bearing I have bad news my friend . A spun bearing you can replace but with the high rpm engines replaccing it is only going to be a temp fix. When it comes down to it your gonna need a new crank shaft cause when you spin a bearing and replace it the new one will not hold as strong as the first because it more than likely made marks in the crank your best bet it to just get a new engine and drop it in.
10-08-2008 8:25 PM
midnightracerx
Re: need help with knocking noise

tks i can use all the help or advice u guys have i have been doing the car thing since forever so if anyone needs anything for their "not so quick ride" then i got hookups at titan motorsports
10-07-2008 2:17 AM
bladeracer
Re: need help with knocking noise

The first thing you need to do is an oil pressure test.
If you have low pressure then a spun bearing is very likely.
Replacment will require opening the engine up.
10-06-2008 7:48 PM
midnightracerx
need help with knocking noise

hey guys heres the deal. my buddy and i were ****in around on 60 goin to vero beach this weekend and i guess i ran low on oil at about 180 and the bike has been making the loud tapping sound between 3k and 4500roms since. plus everytime i go into idle stop the oil light comes on and i added two quarts to it on the way to the beach after it started making the noise. a buddy said he thought it could be a spun bearing and bad oil pump. what do u think and where can i pick up whatever parts i need? i have an 01 900rr

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