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HS4 Throttle Discs

Darren Groves

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I am in the process of rebuilding a pair of HS4's, unusually they still have their identifying tags on and they are AUD665 spec, which according to the Burlen website are standard jet type (not waxstat). The rebuild kits for these have a standard throttle disc, but the ones in there currently are different (as photo). 


Is this butterfly from a Waxstat spec carb and presumably it won't matter if I fit a standard throttle disc?




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