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Tillotson HD-5A
Posted:
Thu May 28, 2020 12:51 pmby Otis
Can anyone identify a tillotson HD-5A? Looks like the HD-1 series but doesn’t have an accelerator pump. Possibly a racing carburetor?
Re: Tillotson HD-5A
Posted:
Thu May 28, 2020 2:49 pmby thefrenchowl
Can't go wrong for ident, it is stamped on top of the flange.
Does not have the choke axle bore machined, plus on the underneath, outside, steel cover for diaphragm and no accelerator pump.
On factory bikes, venturi remachined at HD.
On twin carb factory bikes, the front one has no idle adjustment.
Patrick
Re: Tillotson HD-5A
Posted:
Thu May 28, 2020 5:34 pmby Otis
All the things you said are what this carburetor has so let me rephrase my question; what did this come on originally?
Re: Tillotson HD-5A
Posted:
Thu May 28, 2020 6:00 pmby thefrenchowl
It's part number 27155-66RA and is listed as 1967 and later KR, KRTT, XLR-TT and early iron XRs till 1971
Before that, there was a race kit available to modify the std Sportster Tillotson
Patrick
Re: Tillotson HD-5A
Posted:
Fri May 29, 2020 12:21 amby No side stand
Re: Tillotson HD-5A
Posted:
Fri May 29, 2020 1:29 amby Ferrous_Head
I'm guessing the second and third pics are of the rare Tillotson HD5-DC12 ?
Re: Tillotson HD-5A
Posted:
Fri May 29, 2020 2:38 amby No side stand
- P5290020.JPG (350.62 KiB) Viewed 10607 times
Re: Tillotson HD-5A
Posted:
Fri May 29, 2020 4:11 amby thefrenchowl
But do not run that particular Tillotson 5A without the vent connected...
Otherwise the inlet valve doesn't know what AP is above the gas level in the tank...
Patrick