Duo Venturi

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Triton engine is on sale duo Venturi. 
It make low band air flow stable.
On half throttle the Venturi intake half airflow.
It can use more big diameter.
Japanese RC shop had sold same Venturi few years ago.
I used 8mm diameter Venturi on OS engine.
But it's not good for me.
Felling change suddenly and high speed needle should make rich.
Then mileage getting worse.
Now I return to normal 6.5mm diameter.

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