Metering needle
Product number:
1497
fixed type for standard mixture on SU-HS6 carburettors with no. AUD209 ¨C marked: TW
Product Information "Metering needle"
Triumph: TR4A with twin SU-HS6 carburettors from CTC62191 (1965-67)
fixed type for standard mixture on SU-HS6 carburettors with no. AUD209 ¨C marked: TW
Fixed metering needles have to be dead centre in the hole of the jet so take some time to fiddle around with them to get this right. If it is not correct the fixed needles won't fall completely onto the bridge in throat of the venturi of the carb resulting in poor light throttle running.
Please note: the needle choice will depend on range of engine modifications.