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  #11  
Old 14th January 2019
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Originally Posted by BSA Bob View Post
The coupled wheels should really be fitted with counterweights .
Yes, like they are on railway locos. Good point.

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  #12  
Old 14th January 2019
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Originally Posted by BSA Bob View Post
The coupled wheels should really be fitted with counterweights .
good point!
definitely...
maybe they are fitted inside the round chrome covers...
maybe not... since that bike will travel on her own only a few miles... being a show bike (yet unbalanced spinning con rods would be very very dangerous)...
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  #13  
Old 14th January 2019
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If you look throgh the wheel it kind of look like there is a grease nipple above the chrome wheel. Another con rod for balance?

Andy
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  #14  
Old 14th January 2019
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Looking at the gearbox, there's what might be a similar setup on the other side, presumably at 180 degrees. But the forces generated wouldn't cancel each other out, they'd tend to rock the bike from side to side & place a lot of rocking stress on the gearbox internals.
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  #15  
Old 14th January 2019
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Quote:
Originally Posted by BSA Bob View Post
Looking at the gearbox, there's what might be a similar setup on the other side, presumably at 180 degrees. But the forces generated wouldn't cancel each other out, they'd tend to rock the bike from side to side & place a lot of rocking stress on the gearbox internals.
correct
you have a sharp eye...
looking more carefully... i noticed between the two pulley what seems a brake disk
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