SU HS4 red and black jet

[65MK1S]

Is there any difference between the red and black needle jet
on the HS4 carb?????
Thanks

[Desmodromic]

Black plastic = semi-down-draught

Red plastic = horizontal.

For a mini with 30 degree float bowls you would use black.

[65MK1S]

Black plastic = semi-down-draught

Red plastic = horizontal.

For a mini with 30 degree float bowls you would use black.

Thanks Desmodronmic