Quote:
Originally Posted by Baskt_Case
Hi, I assume you bought a DB-36, not a 26?
Orion offers a 28mm Nibbi upgrade for the Orion RXB which has the same motor as a DB-36.
Around here, the most often recommended carb for these motors is a Mikuni VM26 Clone, which is actually 30mm (confusing part number, I know).
However, I've been reading recommendations elsewhere that a 28mm carb actually works better on your motor.
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The PE28 is a mild upgrade over the PZ30/VM26 due to it being a smooth bore carburetor. It actually flows a little more air and has a lot less turbulence due to the fact that while the PZ30 and VM26 clones are "30mm" bores, they have a very restrictive venturi.
The VM26 is ONLY an upgrade in terms of jet availability/tunability, but otherwise offers no performance benefit over the stock PZ30 carburetor.
If you are wanting the best overall performance then a PE30 (30mm smooth bore) is really the route to go, BUT it is also a much more finicky/sensitive carburetor when it comes to jetting, and in my opinion is not a good place to start for a carb noob. The throttle response and power is very noticeable, but it is close to bordering on being too large without supporting mods, hence why I don't consider it a good carb for the inexperienced.
I agree with Baskt_Case on the PE28 upgrade. I think it offers the best balance for somebody in your position. Orion likely has good jetting suggestions for it as well.
I would highly suggest taking the time to learn about carburetors and carb tuning before diving too far down the rabit hole with upgrades.