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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by johnny on Today at 04:24:19 AM »
greetings...

trans needs a valve job... do you have shems...

j o
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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by Martin on Today at 01:35:25 AM »
Once you synchronize your head shake with the instrument shake you won't even notice it.  :hehehe
Regards Martin.
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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by blackie1 on Today at 12:50:32 AM »
the instrument cluster shake appears to be across the entire family to some degree.
you will be used to it before you know it.

http://www.motobrick.com/index.php/topic,9185.msg73158.html#msg73158

plenty of threads discuss this
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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by Laitch on July 18, 2018, 11:24:24 PM »
Here's another thread that might interest you, Adam.
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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by Laitch on July 18, 2018, 11:03:04 PM »
I suspected one of the crank bearings going out, but oil pressure lamp showed on turned of engine and never came back during a ride.
No, it's not true - I just realized I only pulled the clutch changing gears and didn't do it going on 404 at 100 km/h.
So it could be a bearing in the tranny.
Golly! The sky is falling! The bearings are ok. I can see their aura from here—a soothing mint green.

Because it's a neglected K75S, it needs its fairing fittings tightened, a dose of stuff the monkey and probably a tune up. Bad bearings would be a bonus.
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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by Adam M on July 18, 2018, 10:54:49 PM »
No, it's not true - I just realized I only pulled the clutch changing gears and didn't do it going on 404 at 100 km/h.
So it could be a bearing in the tranny.
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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by Adam M on July 18, 2018, 10:17:50 PM »
Definitely with engine speed, after you pull the clutch everything went away. I didn't look at tacho, but I believe 100 km/h was around 4000 rpm ?
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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by rbm on July 18, 2018, 10:08:23 PM »
IMO,  K75's should not vibrate the way you describe.  Something's up with that.  How pronounced were the vibrations?  Were the vibrations in sympathy with the engine speed or the road speed?

The dancing instruments is peculiar as well.
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Welcome To Motobrick.Com / Re: Starting the research on R80 and K75
« Last post by Adam M on July 18, 2018, 09:39:48 PM »
So I went for a ride and was really impressed with the bike behavior with 2 exceptions :
 - instruments in the faring were dancing furiously all the time,
 - guttural vibration was slightly felt with speed 60 - 80 km/h but became really intrusive to the point of a strong feel even in the handlebar around 100 - 120 km/h
Bike was dropped in the past, tank was painted and faring has a slight crack in the left side touching tank.
My question is - could this kind of vibration be caused by lets say any imbalance in throttles, dirty injectors or faulty ignition set up, or something got really screwed during motorcycle drop. I suspected one of the crank bearings going out, but oil pressure lamp showed on turned of engine and never came back during a ride.
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