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Vibration
- xbmxxx
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11 Sep 2011 20:37 #476002
by xbmxxx
76 KZ750B Twin
Vibration was created by xbmxxx
76 KZ750 Twin
2 in to 1, Pods, cafe seat, drag bars, relocated electrical, mounting tabs cut off, fenders and instrument cluster removed, and the rear frame removed just behind the shocks.
When I got it I reset the points, bled the brakes, reset the idle and primary mixture, and did some body work.
There is a pretty annoying vibration transmitting through the handlebars. I didn't ride the bike more then a few blocks before I started hacking and grinding and changing parts, so I am not sure if the problem is something I did or if it was a preexisting condition.
I cant seem to find the torque specs for the engine to frame mounts in my service manual or on google, so I tightened them to the point my 3/8 cordless Makita impact stopped turning them. I also checked the rubber bushings around the bars on the triple tree, and it all looks good.
Any ideas what else could be causing this? I dont want to just cover it up by using weighted bar ends and foam grips, but it makes highway riding miserable.
2 in to 1, Pods, cafe seat, drag bars, relocated electrical, mounting tabs cut off, fenders and instrument cluster removed, and the rear frame removed just behind the shocks.
When I got it I reset the points, bled the brakes, reset the idle and primary mixture, and did some body work.
There is a pretty annoying vibration transmitting through the handlebars. I didn't ride the bike more then a few blocks before I started hacking and grinding and changing parts, so I am not sure if the problem is something I did or if it was a preexisting condition.
I cant seem to find the torque specs for the engine to frame mounts in my service manual or on google, so I tightened them to the point my 3/8 cordless Makita impact stopped turning them. I also checked the rubber bushings around the bars on the triple tree, and it all looks good.
Any ideas what else could be causing this? I dont want to just cover it up by using weighted bar ends and foam grips, but it makes highway riding miserable.
76 KZ750B Twin
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- bountyhunter
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12 Sep 2011 02:10 #476067
by bountyhunter
1979 KZ-750 Twin
Replied by bountyhunter on topic Vibration
Hard to say, maybe it's normal twin vibration.xbmxxx wrote: 76 KZ750 Twin
Any ideas what else could be causing this?
1979 KZ-750 Twin
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- Proxy
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- 80% Human 20% Nuts/Bolts
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12 Sep 2011 09:28 #476094
by Proxy
Take it from me cuz I found
If you leave it then somebody else is bound,
To find that treasure, that moment of pleasure,
When yours, it could have been.
1977 KZ650 B1 Being restored to original (Green)
1977 KZ650 B1 Original (Red) Sold
1977 KZ650 B1 Donor Bike for Parts
Replied by Proxy on topic Vibration
Got the carbs supported in back?
Take it from me cuz I found
If you leave it then somebody else is bound,
To find that treasure, that moment of pleasure,
When yours, it could have been.
1977 KZ650 B1 Being restored to original (Green)
1977 KZ650 B1 Original (Red) Sold
1977 KZ650 B1 Donor Bike for Parts
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- TexasKZ
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12 Sep 2011 09:49 #476101
by TexasKZ
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
Replied by TexasKZ on topic Vibration
Checked valve clearances?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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- steell
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12 Sep 2011 15:05 #476148
by steell
KD9JUR
Replied by steell on topic Vibration
Did you rejet the carbs for the pod filters and exhaust? And did you sync the carbs after jetting?
KD9JUR
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- hal0tw0
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12 Sep 2011 18:00 #476174
by hal0tw0
1976 KA900. VM28 pumper carbs, K&N pod fiters, RC performace 4/1 exhaust, Dyna ignition, Accel coils and wires, Ohlins rear shocks.....more to come
Replied by hal0tw0 on topic Vibration
Its probably just the typical parallel twin vibe you get from those engines. My XS650 did the same thing. Some things you have to get dead on are the timing and carb syncing or else each cylinder is going to fight each other. I changed my sprockets too so that it wouldnt buzz so much at 65 mph.
1976 KA900. VM28 pumper carbs, K&N pod fiters, RC performace 4/1 exhaust, Dyna ignition, Accel coils and wires, Ohlins rear shocks.....more to come
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