Personally I can't think of anything where the HIFs are easier to work on
than HSs, quite the reverse. On HIFs the carbs have to be removed to get at
the float chamber and valve, and a new O-ring fitted each time or the cover
will leak. On HSs the cover can simply be removed in-situ, and even though
it has a gasket this is above the normal fuel level and so is not critical.
On the HIF the choke or enrichment device is a separate valve, which can
have its own problems like leaking O-ring seals, unlike simply moving the
external main jet as on the HS. Having a pair of each I'd say that the HIFs
are slightly more difficult to get the correct mixture using the lifting
pin. The benefit of HIFs is that they are marginally kinder to the planet,
and the temperature controlled main jet means that correct mixture is
maintained across a wide temperature range, rather than tending to get a bit
rich in hot conditions or a bit weak in cold. Between the two, I always
recommend HSs.
PaulH.
----- Original Message -----
> ... HF4's might have even been better because they can be worked on
> easier.
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