2000 VFR Engine Vibration - diagnosis?

What vibration are you trying to eliminate ? All the 800fi's I've ridden have a certain high frequency vibration if the bar weights have been removed !

 

If you get a crazy shake at very light throttle while cruising, say at 35mph and/or 60mph, that is a starter valve synch problem for sure.

If throttle is very ON/OFF at idle, making it difficult to do low speed maneuvers without having to raise the rpm excessively and slip the clutch more, that is another indicator of a starter valve imbalance.

There can be starting issues as well like multiple attempts to start or difficult to start when cold.

In any case it is a good idea to do this procedure.

 

Mohawk, bar weights are on. After 250km run on Saturday, I was bagged. Hands and feet fell asleep. Just seems worse then last year. Could be that it was just the first good ride of the year.
Knight, she starts well but I just want to go through the process of elimination. It's excessive when on the throttle, more so as rpm's climb. Granted, the bike now has approximately 113k km's on it. Just don't want it to be an interal issue.

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I recently removed the throttle bodies and had injectors cleaned and flow matched.
I did a thorough clean, lube of the TB's inside and out.
When I put it all back together, I did the starter valves to spec, and went for a long ride.
I had a bad vibration starting at 5200, which got worse as revs went up. At 7000 it was at its worse and very anoying (hand numbing). I even thought something might be wrong.
It was felt mainly at the bars and left peg.
Went back in the shed and rechecked, it was way out, maybe a ride settled it all down.
After redoing it I took it out again and the difference was huge.
So I went back in and decided to experiment. All flat was not as good, a bit more gap than the manual states was worse, a little bit less than the manual states was fine.
Don't get me wrong, there is a vibration at around 7000 which will not go away, but it doesn't affect hands or left foot. You can just feel it.
Unlike carbs, the throttle body butterflies competly shutt when idling, air is bypassed through the starter valves, and they never actually shutt off.
So even at full throttle, air is still going through the starter valves.
My old 86 VFR750 also vibrated (if you can call it that), it was a trait of the V4 engine, it was mainly felt on the plillion seat. I remember my girlfriend at the time liked it, liked it a lot, .....a real lot!!!
I still have the gauges I used on that bike, but I don't used them on the 5th gen. I use a digital gauge from my refrigeration trade, only 1 so its a pain, but very accurate and adjustable to read for average.
Doing the starter valves is not hard, but you do need accurate gauges, that are well set up if you want it spot on. TB's don't have as much vacuum as carbs, they don't need to suck fuel through a jet, so it needs gauges with a bigger dial/increments if you know what I mean.
And revs should be 1200 at idle.
I can nearly guarantee that your problem is starter valves.

 

Where do you get this info? Yes it is a crossplane, but it also has a "big bang" firing order. 270-180-90-180 degree firing order. You can make a crossplane with a regular "screamer" firing order as well.