Raddling/Vibration at 2500rpm

Siebold · August 31st, 2005, 09:29 PM

Hi, my name is Herbert and I am new to the forum. I have a 1993, CBR900RR that I purchased in 1994. It only has around 9,000 miles. A month ago I noticed a raddling noise when the bike is between 2,500 - 3,000 rpm (riding or standing still). I replaced the cam-tensioner but the noise remains. Any ideas

Please advise, thanks.

**Blademan** · September 1st, 2005, 03:15 AM

Are you sure it is from the motor? I hear something rattle everytime I go over large bumps or cracks in the road and I cannot figure out what it is. I have thought it might be my headlight bracket making the noise.

I recomend giving everything a once over. Set your idle to 2500 and walk around the bike to hear.

NIHILator · September 1st, 2005, 06:46 AM

If it does it sitting still, It might be something mechanical, or a harmonic vibration. But those usually occur at a higher, tighter RPM. If you can, I suggest getting one of those mechanics stethoscopes with the probe on it. You just find where you think the noise is, then keep touching it to parts until you find where the noise is loudest.... Very effective.

Siebold · September 1st, 2005, 08:54 AM

Thanks for the quick response;

Blademan, I am sure the noise comes from somewhere underneath the tank and it is annoying as hell. Specially when I am splitting lanes through traffic and the noise bouncing of the cars makes the vibration noise even louder. I'll do the once over this weekend and see if I find anything loose.

NIHILator, It does sound like at 2500 - 3000 rpm I hit a harmonic. I took it to the dealer and they said that is common with the CBR's ..... what is, the noise? They have no fix for it just an off the shelf answer. I will use a stethoscope to listen and will poke around the bike to see if I can narrow down the location of the noise.

Thanks for the advise, I'll keep you posted.

**Blademan** · September 1st, 2005, 09:44 AM

Can you get ahold of a rear stand and maybe let the rear tire spin while you

Siebold · September 1st, 2005, 10:05 AM

I guess I could get one but since the bike makes the noise while standint still in neutral, I doubt that would help pin point the problem.

NIHILator · September 1st, 2005, 03:02 PM

Who knows..... To tell the truth I've heard that all the Big CBR's are a bit rattly.... Mine's a 2004 CBR1000RR and I've noticed a rattle at low rpm. I don't even run my bike that low. I launch at 3000rpm (mag guy said same thing) and keep it upward of that always. If I launch it lower than 3k rpm the bike rattles like hell. And its brand new

**wingnut1** · September 2nd, 2005, 07:42 AM

Check your motor mounts I had to tighten mine back down after 15k miles last year

Siebold · September 7th, 2005, 09:50 AM

Thanks for all the tips. I did use a stethoscope, checked the motor mounts, etc to no avail. Finally took it to the shop. They replaced the cam-tensioner and the problem is gone. $250 but the noise is gone.

NIHILator · September 7th, 2005, 12:38 PM

Nice....Glad to hear it!

66droptop · September 7th, 2005, 12:46 PM

After I got my tank back from the painter, I threw it on and the bike would have the most annoying rattle. I don't think it was even touching the frame. But apparently without those little black things that are glued to the tank on either side, the bike will make a hideous racket. I glued them back on, and no problems.

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August 31st, 2005, 09:29 PM	#1
Siebold Not been here that long Join Date: Aug 2005 Location: San Jose, CA Posts: 15 Bikes: 1993 CBR 900RR	Raddling/Vibration at 2500rpm Hi, my name is Herbert and I am new to the forum. I have a 1993, CBR900RR that I purchased in 1994. It only has around 9,000 miles. A month ago I noticed a raddling noise when the bike is between 2,500 - 3,000 rpm (riding or standing still). I replaced the cam-tensioner but the noise remains. Any ideas Please advise, thanks.

September 1st, 2005, 03:15 AM	#2
Blademan RRzone Elder Join Date: Jun 2004 Location: Barre, Vermot Posts: 1,973 Bikes: 2006 CBR1000RR -- had 1999 CBR 900 Black, 1995 CBR 600F3, Had 1985 Interceptor 500	Re: Raddling/Vibration at 2500rpm Are you sure it is from the motor? I hear something rattle everytime I go over large bumps or cracks in the road and I cannot figure out what it is. I have thought it might be my headlight bracket making the noise. I recomend giving everything a once over. Set your idle to 2500 and walk around the bike to hear. __________________ When life hands you lemons . . . cut'em up . . . put'em in a Corona . . . and drink. Problem solved !!

September 1st, 2005, 06:46 AM	#3
NIHILator RRzone Elder Join Date: Apr 2005 Location: Atlanta GA area Posts: 814 Bikes: 2004 CBR1000RR, 2000 ZX-9R (project bike)	Re: Raddling/Vibration at 2500rpm If it does it sitting still, It might be something mechanical, or a harmonic vibration. But those usually occur at a higher, tighter RPM. If you can, I suggest getting one of those mechanics stethoscopes with the probe on it. You just find where you think the noise is, then keep touching it to parts until you find where the noise is loudest.... Very effective.

September 1st, 2005, 08:54 AM	#4
Siebold Not been here that long Join Date: Aug 2005 Location: San Jose, CA Posts: 15 Bikes: 1993 CBR 900RR	Re: Raddling/Vibration at 2500rpm Thanks for the quick response; Blademan, I am sure the noise comes from somewhere underneath the tank and it is annoying as hell. Specially when I am splitting lanes through traffic and the noise bouncing of the cars makes the vibration noise even louder. I'll do the once over this weekend and see if I find anything loose. NIHILator, It does sound like at 2500 - 3000 rpm I hit a harmonic. I took it to the dealer and they said that is common with the CBR's ..... what is, the noise? They have no fix for it just an off the shelf answer. I will use a stethoscope to listen and will poke around the bike to see if I can narrow down the location of the noise. Thanks for the advise, I'll keep you posted.

September 1st, 2005, 09:44 AM	#5
Blademan RRzone Elder Join Date: Jun 2004 Location: Barre, Vermot Posts: 1,973 Bikes: 2006 CBR1000RR -- had 1999 CBR 900 Black, 1995 CBR 600F3, Had 1985 Interceptor 500	Re: Raddling/Vibration at 2500rpm Can you get ahold of a rear stand and maybe let the rear tire spin while you __________________ When life hands you lemons . . . cut'em up . . . put'em in a Corona . . . and drink. Problem solved !!

September 1st, 2005, 10:05 AM	#6
Siebold Not been here that long Join Date: Aug 2005 Location: San Jose, CA Posts: 15 Bikes: 1993 CBR 900RR	Re: Raddling/Vibration at 2500rpm I guess I could get one but since the bike makes the noise while standint still in neutral, I doubt that would help pin point the problem.

September 1st, 2005, 03:02 PM	#7
NIHILator RRzone Elder Join Date: Apr 2005 Location: Atlanta GA area Posts: 814 Bikes: 2004 CBR1000RR, 2000 ZX-9R (project bike)	Re: Raddling/Vibration at 2500rpm Who knows..... To tell the truth I've heard that all the Big CBR's are a bit rattly.... Mine's a 2004 CBR1000RR and I've noticed a rattle at low rpm. I don't even run my bike that low. I launch at 3000rpm (mag guy said same thing) and keep it upward of that always. If I launch it lower than 3k rpm the bike rattles like hell. And its brand new

September 2nd, 2005, 07:42 AM	#8
wingnut1 RRzone Elder Join Date: Dec 2004 Location: Knoxville TN Posts: 363 Bikes: 98 CBR 900 rr, Ducati 748s	Re: Raddling/Vibration at 2500rpm Check your motor mounts I had to tighten mine back down after 15k miles last year __________________ Leon Carney 98 cbr 900rr (SSSA, custom GP exhaust, front end conversion) 01 Ducati 748s

September 7th, 2005, 09:50 AM	#9
Siebold Not been here that long Join Date: Aug 2005 Location: San Jose, CA Posts: 15 Bikes: 1993 CBR 900RR	Re: Raddling/Vibration at 2500rpm Thanks for all the tips. I did use a stethoscope, checked the motor mounts, etc to no avail. Finally took it to the shop. They replaced the cam-tensioner and the problem is gone. $250 but the noise is gone.

September 7th, 2005, 12:38 PM	#10
NIHILator RRzone Elder Join Date: Apr 2005 Location: Atlanta GA area Posts: 814 Bikes: 2004 CBR1000RR, 2000 ZX-9R (project bike)	Re: Raddling/Vibration at 2500rpm Nice....Glad to hear it!

September 7th, 2005, 12:46 PM	#11
66droptop RRzone Elder Join Date: Feb 2005 Location: AZ Posts: 2,531 Bikes: S1000RR, Acid green metallic	Re: Raddling/Vibration at 2500rpm After I got my tank back from the painter, I threw it on and the bike would have the most annoying rattle. I don't think it was even touching the frame. But apparently without those little black things that are glued to the tank on either side, the bike will make a hideous racket. I glued them back on, and no problems.

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