You will need to put Spitfire needels and jet's in your carb. For the
jet's it's only a matter of finding ones of the correct inside bore.
You can also probebly use the stock needels from a Spitfire streight
from the HS4's size 'ABT'. You may also need the piston spring from a
Spitfire.
As for the initial hesitation, first check the piston for sticking when
you push it up. Then the next thing to look at is putting lighter
weight oil in there.
--
James Carpenter
Yellow '79 spit wired by a trained marmot
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