Buzziness Revisited on 8 valve 1100

[1948man]

My 8 valve 1100 has a ragged sounding buzziness between 4100 and 5100 rpms. Real smooth up til 4000 and at 5200 it starts to scream but pulls crisply without excess vibration. Carbs synced, valves adjusted, floats right, bolts seem tight and this buzziness occurs regardless of gear or throttle position. You can ease up to 4200 without opening the throttle much or grab wide open throttle to bolt up quickly and the results are the same. I haven't investigated the cam chain tensioner as suggested in a similar thread. Is this just a fact of life with the 8 valve 1100's? I read somewhere the 1000 G's were smoother with a different stroke. Oh yeah, I do have a 17" rear wheel instead of the stock 16" that comes on the GL so it runs about 6.25% fewer rpms at a given speed which I guess is like tampering with the gear ratio. I was planning on going back to the 16" wheel when I wear this tire out. The housings of the gauges seems a little loose also. Any ideas?

[TheCafeKid]

For whatever reason the 1100 shaft was just buzzy by nature moreso than the smaller displacement versions. Usually right around where you're talkin about. You can try syncing the carbs at that rpm, if you spend the majority of your time there rather than the 2500 rpm or whatever is suggested in the manual.
Sync seems to be more critical on that bike...

[1948man]

Thanks, I'll try that next sync. I tried to sync at a higher rpm one other time but was having a problem. Turns out one of the rubber lines got on something hot and developed a hole I wasn't immediately aware of. I'm going into my clutch soon, a clutch rattle wouldn't behave like that at select higher rpm's would it?

[Katarat]

Have you tightened all your motor mount bolts ? Worth a shot.

[1948man]

I've eyeballed them but will will check closer with a socket to see if there is any easy tightening available.

[Big T]

Also, check your horns

Mine used to vibrate up and down and cause the tank to buzz at that RPM