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Any Harley mechanics here?

Normally if you pop on throttle back you have a loose or bad exhaust gasket. I would check the bolts there first.

As said earlier a rich mixture will not pop, LEAN will cause popping, the flame travels faster.

Fix the s/o valve check the exhaust bolts and ride it,see what happens. Just my thoughts.
 
Normally if you pop on throttle back you have a loose or bad exhaust gasket. I would check the bolts there first.
Thanks
As said earlier a rich mixture will not pop, LEAN will cause popping, the flame travels faster.

Fix the s/o valve check the exhaust bolts and ride it,see what happens. Just my thoughts.
 
I hate to get back to the carb but could one of the jets have build up or be clogged causing it to burn lean?
Check your plugs and see if they are tan or if one is different from the other
 
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