Topic: VF700F weird vibrations at speed

[Frankencake]

I'm no stranger to bikes and I'm no stranger to tools. I'm just plain stumped on this one so give me what you got, please.

85 vf700f 28k miles, New tires and new chain and sprockets this month.  At 50 mph the bike sets up a vibration or undulation as if I'm going over expansion joints on the highway. It cycles about every second at 50 mph and gets faster with more speed. It becomes undetectable above 65. (More tickets, please!) I'm guessing that the tires are working off of each other and getting a rhythm going and setting up this motion. The bars will wiggle back and forth if I let my arms go a bit floppy.

Should I be looking at steering head bearings? All of my wheel bearings are good and like I said, the drive train is new from the output shaft back.

Might my front springs be sloppy? WTF, man?

[1974CB750rider]

I would look into steering head berings as they are cheaper than springs. Also take into consideration that your fork springs are probaly origional to. Have you checked your wheels to see if you slung a weight?

[weekend_junkie]

Incorrect fork oil?  Frame damage?  Harmonics are a funny thing when they come into play.

[2wheels]

My bike was unstable and it turns out to be the forks.
Check the fork oil, that each fork has the same amount of oil.

[Retro Rocket]

VF700F weird vibrations at speed

Stop using speed and turn off the vibrator......

Mick

[Frankencake]

I ride better that way.