Balance shaft delete?

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TechN

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Joined
Sep 18, 2023
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Ontario, Canada
Is getting rid of the balance shaft a thing on these engines, after balancing the rotating assembly? Looking for input on if anyone has done it.
 
Not that I’ve heard. Will need something to turn the water pump gear.
 
What would be the benefit?
Apart from the point Mr Maleko makes, all that would happen is that you would get more vibration from the engine.
ALL engines are balanced, think (say) the Meriden Triumph twins but whist that will balance the reciprocating masses, it doesn't cancel out unbalanced dynamic forces.
Have a butchers here for a more detailed explanation.
 
Is getting rid of the balance shaft a thing on these engines, after balancing the rotating assembly?
What would be the benefit?
The purpose of the balance shat IS to fully balance all rotating assemblies.
Apart from the point Mr Maleko makes, all that would happen is that you would get more vibration from the engine.
ALL engines are balanced, think (say) the Meriden Triumph twins but whist that will balance the reciprocating masses, it doesn't cancel out unbalanced dynamic forces.
Have a butchers here for a more detailed explanation.
 
We've done it with a machined off shaft to remove weight and it had a wicked vibration at 2 different RPM zones. One right where you would ride at on the highway. The other was higher up. Didn't take long before that engine didn't like it anymore.

View attachment 95653

View attachment 95654
Glad to know not to do it. Are there any differences between the balance shafts throughout the years or on the venture 1300 and rsv?
 
My friend who builds Hyabusas sometimes has eliminated the balance shafts. That case-cracker surely seems to be a good reason not to try that with a VMax, turning-down the counterweights.
 
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