I'm using firefox so can't play this. It;s a great vibration model that you can change the degrees on and shows how the vibration varies.
http://www.xs650.org.au/Downloads/Downloads.htm
http://www.xs650.org.au/Downloads/Downloads.htm
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Vibration suppression
- Thread starter Razorback
- Start date
Tomterrific
XS650 Junkie
The 360 crank has a strong primary unbalance. This is partially balanced out by the flywheel. A certain percentage of the rod and piston weight is opposite on the flywheel. This is always over 50% as front/back unbalance isn't as bad as up and down.
A 270 crank, or any other than 360, introduces a rocking couple. A 180 has it the most. I seem to feel this as a tingle. The vertical twin with the cylinders far apart would accentuate rocking couple vibration.
Just chatting for interest.
Balanced carbs and ignition help vibration at speed. I did fill my handle bars with a shot filled hose. It seemed to eliminate any vibration below 65 mph.
Tom
A 270 crank, or any other than 360, introduces a rocking couple. A 180 has it the most. I seem to feel this as a tingle. The vertical twin with the cylinders far apart would accentuate rocking couple vibration.
Just chatting for interest.
Balanced carbs and ignition help vibration at speed. I did fill my handle bars with a shot filled hose. It seemed to eliminate any vibration below 65 mph.
Tom
Razorback: I recommend that you delete the email address you posted. You have exposed yourself to security problems by doing so.
