Many scooters are throttled. A popular measure to castrate the engine are obstructions of the gas flow in the manifold.
Open manifolds with a large cross-section and/or short guide length provide a remedy. The open manifold is simply exchanged against the original manifold and is suitable for the original muffler.
Both performance and the achievable top speed are increased significantly. Ideally, after the assembly of such a manifold, the usually existing throttle in the variomatic (throttle ring) should also be removed. Otherwise the engine will constantly turn too high under full load.
These manifolds are not road legal!
AI-translation
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