Z155 28oko or 30oko?

[DustyFork]

Got a z155 tb v2race head tb race piston plus 30mm to 27mm manifold. I have 2 carbs oko 28mm and a 30mm oko. 28oko is real, 30mm is fake. I can use the guts out of the real 28mm in the 30mm. Which one should i use? Any one using these set up? What's ya jets and needle clip if so?

 

[Blender]

Its all up to how your riding. If your all up top, go the 30mm. although, Im not sure you'd get the peak performance your after with a copy.

If your all for down low power, go the 28. Mind you, it would still have alot up top, being an OKO and flatside.

I'd go the 28.

 

[gottagetacheaperhobby]

28mm oko should be perfect really, 30mm would suffer from low rpm bog from everything i have read.

 

[my67xr]

yeah out of those 2x carb's i'd try the 28mm,
i will be running a 26mm on mine.

you can swap the bottom ends of them over too.
or have a look in the OKO thread, it explains how to modify the copy and make it pretty much the same as the genuine OKO

 

[DustyFork]

Yeah seen that thead a few times. I think I got a s35 cam. Very aggressive up top likes the throttle. It don't cruze to well at mid range when ya just putting along. It sort of don't suit the scrub riding id do only when ya racing ya mate around