GT6+ grose jets?

[Tom Carney <tcarney@concentric.net>]

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  I am currently in the process of getting new needles for 
the GT6.  I think the carbs are from a Mk1 since it has the 
the longer adjusting orifice at the bottom.  My question is 
are grose jets better than the stock ones also sold?
Thanks
Tom

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