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DU142 bolt thread size?

Quick query. Are the two head light mount bolts BSC? Threads in my shell look a bit ropey and I don't want to make them worse. I'm aware these aren't a BSA part.

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Re: DU142 bolt thread size?

Definitely Cycle thread...5/16" dia. from memory...Ian

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Re: DU142 bolt thread size?

Thanks Ian, that's a relief; I have a 5/16 BSC tap. I had a nagging thought that it could be BSF or Whitworth. I hope the shell threads aren't too rough to save.



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