Strange vibes at 500rpm

Hey guys I'd appreciate your help on this.
I have a new 92 VFR750 and it has a strange sounding vibration that starts over 5000 rpm.
It sounds like it's coming from the tank.

Any ideas?

 

Start at the tank and start removing things till you find what is loose.

 

Nah that is the sound of your wife screaming for her life!!!!!!!!otstir:


heheheh but seriously, perhaps something has happened to your air cleaner like perhaps a rodent ate a hole in it and now the sound is different????

 

Squirrel is blamed.....

or a mouse or rat, but it's sheer prejudice ! how ofter do squirrels get blamed for electrical outages when poor maintenance or out-dated equipment is actually at fault???? never mind !

500 rpms or 5000 ??

most likely cause of the unwanted vibes is missing "buffers," an inch-long bit of rubber on each side between the fuel tank and the frame. they usually fall off when the tank is lifted for maintenance.

 

Thanks for the help, yeah I'll take off the tank and chck for the buffers, its 5000rpm I noticed on the freeway today it goes away at about 7000rpm.
anyway I;ll do the tank n see.

 

any resolution on this, mine has been making a vibration/noise at 5000 under full throttle

 

Maybe you're in too high a gear ?? If you go full throttle at only 5000, you need to be in a low gear or you're lugging the engine.

 

The 3rd gen has a known resonance that is heard/felt in the fuel cap at that rpm range. The foot peg plates have a heavy piece of metal bolted onto the back sides that may have been honda's attempt to damp out the vibration--it seems to get worse if you remove those weights.

 

it's the rubber boots/bumpers that isolate the front of the tank from the frame. check em out, they are either dead or going to die. They are like mini skateboard wheels