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The inner sprocket inside the chaincase is grinding against the nuts of the bearing holder. I added an extra spacer but it is still happening. anyone ever had this issue before? It only does it if you slam the throttle from a complete stop. I could really use some help. Thanks.
 

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are the bearing cups on the opposite side both on the inside of the tunnel? thats one thing that helps keep that alligned...if u have one bearing cup outside the tunnel for ease of bearing replacement...this is likely the problem
 
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