vibrations at 4000rpm

My 78 will blur the mirrors in that range.I'm used to it.My friends 77 GS750 does it too.

9am53 wrote:

I have never noticed the vibration when parked in neutral, but it happens whenever I am riding. When I accelerate it begins at about 3800, and ends at 4000, so it's only a small window, but it's annoying.

My 750 twin does it from about 3600 to 4200.

txturbo wrote:

if you have vibrations at certain RPMs, check to make sure all your motor mounts bolts are tight.

I'll do that tonight, and I am going to try the rubber dampeners too, along with a tune up as soon as I get some scratch together. I do get the impression that these engines kind of do this normally though, I think I may have been overanalysing my situation