Here is the DELLORTO VHSB 34 QD carburettor, the most violent carburetor! Parameterized to be efficient, it is a model intended and adjusted for rotax max 2-stroke engine, flexible assembly with lever choke, without separate greasing or vacuum connection and socket for antifreeze circuit.
Obviously, it is not a replica but a real carburetor from the Italian house DELLORTO. This version is configured with FN266 needle well, 168 small pitch main jet, 60 choke jet, 30 idle jet, K27 needle. With this basic configuration, this carburetor is clearly intended for racing configurations with good diagrams and requiring more precise settings. The fixing at the level of the pipe is in diameter Ø44mm with machined anti-slip lip, moreover the fixing for air filter remains in Ø65mm. The finish is obviously perfect at all levels on these models and the photos are there to prove it!
Round valve carburetors are easier to adjust over the entire rev range, for example from 4000 to 16000 rpm. The flat bushels generally used on motocross, offer more engine response (the engine responds faster to the opening of the bushel), there are also special flat bushels versions suitable for competition, track, and high speeds ...
We note that a round bushel is the best choice for driving every day with ease of adjustment, low consumption, excellent performance at high speeds, very good stability (although the fashion is oriented to low-end flat bushels ...) . In addition, we generally recommend a flat cylinder plug with barette exhaust while the round bushel would be better suited to cylinders with booster or oval exhaust.
Summary:
-Ø of the carburetor: 34mm
-QD model
-Diameter of fixing on pipe or flexible sleeve: Ø44mm
-Diameter for air filter: Ø56mm
Delivered configured with the following elements and parameters:
-Main jet: 168
- Idle jet: 30
-Choke jet: 60
- Needle: K size 27
- Needle well: FN size 266
-Double float: 4 gr
- Needle cpl: 150
-Flat bushel: 40
