
Carburettor repair kit SU HS6, needle not included
PV, Amazon, 1800, 140
- Model year:
- 1961–1973
- Engine:
- B16, B18, B20
- System:
- SU HS6
Rough idle, an overly rich mixture or poor sync between the front and rear carburetor are classic symptoms of worn SU H6 units on a B18 with twin carburettors. Wear in the metering needles and sticking pistons makes the mixture wander, and leaking gaskets between the carburetor and intake cause false air and a hard-to-adjust idle.

PV, Amazon, 1800, 140

PV, Duett, Amazon, 1800

PV, Duett, Amazon, 1800


PV, Amazon, 1800, 140


PV, Duett, Amazon, 1800, 140, 164, 240, 260

PV, Duett, Amazon, 1800, 140

PV, Amazon, 1800, 140

PV, Duett, Amazon, 1800, 140, 260, 240

PV, Duett, Amazon, 1800, 140

PV, Amazon, 1800


PV, Duett, Amazon, 1800, 140, 164, 240

1800, 140

PV, Duett, Amazon, 1800

PV, Amazon, 1800, 140


Amazon, 1800

Amazon, 1800

PV, Amazon

Amazon

PV, Duett, Amazon, 1800, 140

Amazon, 1800
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This category gathers the wear parts and sealing details for rebuilding and adjusting the SU H6 pair on the B18B/D. The group includes metering needles, springs, screws, gaskets, washers, spring washers, retainers and bushings. During an overhaul, the metering needle profile, the damper springs and the gaskets against the intake manifold are typical check points – replacing them at the same time makes it easier to get both carburettors to breathe alike. The B18 with 1778 cc and a five-bearing crank got its twin-SU feed in the stronger version, and the right needles are crucial for both cold starting and smooth throttle response.