My much loved GS1150EFE has one, just one annoying characteristic: at 4000-5000 rpm I get a harmonic buzz in the handlebars. Naturally this rpm range corresponds to "normal riding speeds", so it becomes a pain in the hands. Has anyone done experiments on changing handlebar weights or perhaps using a section of Bar Snake either in the handlebars or on the fairing brackets?
Well.. The buzzes on my 1327EFE seem less pronounced than those on my Katana fitted with a stock EFE engine.. To avoid my right hand becoming numb quickly I swapped the nice but very thin Renthal grips for some thicker (foam/gel?) onces with a similar appearance and I inserted a diy handlebar weight (bolt+nut through rubber block) into the aluminium drag bar.. These two alterations have cut the buzzing down a lot.. Only occasionally still have a slight hint of numbness on long rides at a constant speed..
That's the problem...it's an ACE touring bike, but 3 hours of 75mph+ will leave your hands feeling numbish. There's GOT to be a way to cut it down....on my first Classic Katana we moved the turn signals from the fairing to the frame (already threaded holes available) and it reduced the bar buzz by 2/3 at once. That's why I'm thinking of (1) adding some bar snake to the bars (2) adding some bar snake zip tied to the mail fairing bracket. II'll rev it up and see what vibes the most then zip tie bar snake to that place. Would be nice to know if someone else had done so before though.....?
Bandits have dampers screwed on the frame (one near the headstock, one in the tailpiece). They are basically lumps of steel, approx 0,5kg each. Only reason I can think of is to kill vibrations. Might be worth a try?
And God promised men that good and obedient wives would be found in all corners of the world.
Then He made the earth round... and laughed and laughed and laughed...
I have -86 1327 EF with trued and rewelded crankshaft, no vibrations. Then I have -84 1135EF on original condition, bad vibrations about 4000rpm range. I think the best thing (not the cheapest and the easiest) to do to get the vibrations down is truing the crankshaft.