Intake manifold spinner plate yx140

[4T_Goblin]

I have a spinner plate 28mm id with poor milling. Its the one that comes with the o-ring. the o-ring is awful and goes bad quick. I believe it to be the source of a tiny, yet permanent air leak. I purchased a plate with no o-ring or channel with an id of 26mm to replace it.

My yx140 head has an intake inlet of 27mm, and I'm using a manifold with 28mm, and a pe24fl Nibbi.

If I use the 26mm plate between the 28mm manifold and 27mm inlet, will there be lots of turbulence at the adapter and cause issues with the engine running properly?

I know some folks who use the 26mm adapter on their zs190, which has a 30mm intake inlet.

What are your thoughts on this? Is the size enough to cause trouble or would it be negligible one a motor this small?

Thanks