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MG Midget and Sprite Technical - Fixed Jet conversion for HS4

I understand that Hs4 twin carbs with waxstats on the midget 1500 have ADN needles fitted and ones fitted with fixed jets have ABT needles.

My question is if i replaced the waxstats with a fixed jet conversion would i also need to replace the needles ?

thanks
D Stratton

They look exactly the same profile wise, but the ABT is slightly thinner throughout the whole rev range, presumably this is because the jet sits at a different height.

http://www.mintylamb.co.uk/suneedle/

I reckon you could keep the same needles but you'd have to reset the jet height so the mixture was right on idle.
Rob Armstrong

This thread was discussed on 20/01/2012

MG Midget and Sprite Technical index

This thread is from the archive. The Live MG Midget and Sprite Technical BBS is active now.