Hiya guys at 70mph my bikes fairly smooth.at 75mph it vibes like fook.any ideas apart from the usual t/body balance/tps.cheers
r1100gs 75mph vibes
- Thread starter bart2181
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Vibration felt where? Handlebars, seat?
Is it related to revs or just speed?
Speed, suggest you look at wheels, rear swing arm inc. bevel drive and shaft, front forks and front swing arm ball
Is it related to revs or just speed?
Speed, suggest you look at wheels, rear swing arm inc. bevel drive and shaft, front forks and front swing arm ball
I'd try loads of different permutations to see if I could pinpoint if it is anything to do with engine speed. Same speed 4th gear clutch in and freewheel tuch brakes ect. JJH
Thanks for the replys guys.the vibration is felt through the bars.
My 1100gs does that too sometimes .. felt thru the seat ..other times smooth as .. 
hey ho as long as its not grinding or whining am happy ..starting to get used to its foibles ... 
hey ho as long as its not grinding or whining am happy ..starting to get used to its foibles ... 
Me too. Was awful with T66 tyres. Much better when I put TKC 80s on.
Guys I cant remember how long the vibes have been there.im thinking it could be a contribution of 85k hard mileage and a 50mph crash in which the right side cylinder head cover suffered substantial damage
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You might want to check your valve clearances and rocker end float ,just saying like
already have.You might want to check your valve clearances and rocker end float ,just saying like
My 1100 with carbs is super smooth to 5k then starts a vibe felt through bars which doesn't get much worse as revs increase Same in every gear and smooth with clutch pulled in. It's done 61k miles. Maybe i am expecting too much for it to be vibe free at 7k+ revs but haven't ridden an 1100 before though I have owned 2010 and 2013 gs. Have checked valves and sync. Something in drive train worn maybe ?
reduced the rocker end float and balanced the carbs at 4000 using a harmonizer and have now reduced vibes to an acceptable level so that cruising at 70 in top is smooth enough. Nothing to do with drive train - if I now rev the engine while tootling along with clutch pulled in in I can feel a vibes come in as the revs get above 5k. But now it is very minor, mirrors perfectly clear, and bike can ridden in nearly all conditions without needing to rev much above 5k. I dare say that a twin with 60K on the clock is going to seem more vibey than other multi cylinder bikes in last 1/3 of rev range. Main feature of my carbed bike is how silky smooth the pick up from low revs is - in any gear
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