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Since the original valves "ADIGE 6 blade" on DERBI euro 1, 2 and 3 are extremely powerful, many preparers keep them as a basis on their Derbi engines, some even fit them on MG MALOSSI housings, engines AM6 ... These valves 6 slats can play on a different frequency between exterior and interior, again, the original box derbi is vulcanized (coated Viton). We still advise to create a diffuser in these valves to make them even more efficient.
So we offer this kit 3 set carbon plates, this high quality carbon erases up the harmful vibrations of the carburetion and also allows to have a later resonant frequency depending on thickness. The 0.30mm thickness will be advised on the original engine and very coupler on 0.35 mm for between 2 and 0.40mm for powerful engines high speed. You can also ask 0.35mm and 0.40mm serve you stop to cut ...