DOPPLER ER2 competition valves, very high quality! DOPPLER is not satisfied with a model for DERBI and AM6, but makes a specific model for each to respect the dimensions. Solid base in sanded aluminum and bonded for a soft closing of the slats, this base is non-deformable, red diffuser, slats in DOPPLER specific reinforced fiber to obtain the right resonant frequency (power range).
The lamella stops fixed by 2 cruciform screws (easily removable) are specially studied / drilled to avoid gas masses. A small concentrate of special performance technology for your motorcycle. Mounts on mécaboite engine derbi euro 1, 2 and 3. These valves will therefore offer you much more performance than the original models.
To top it off, these valves are delivered with a red diffuser (venturi) to better direct the gases, do not make the mistake of removing it or not installing it! This diffuser brings you many additional performances. The ideal is to align your pipe to this diffuser in order to optimize your carburation even more. Delivered complete as presented.
Mounts on all DERBI euro 2 and euro 3 engines, example :
APRILIA: RS 50 dal 2006 -> (DERBI D50B) - RS4 50 (DERBI D50B)
BULTACO: ASTRO 50 - LOBITO 50
DERBI: GPR 50 - GPR 50 Nude - GPR 50 RACING - GPR 50 racing dal 2006-> (DERBI D50B) - SENDA 50 DRD dal 2006-> (DERBI D50B) - SENDA 50 DRD R - SENDA 50 DRD SM - SENDA 50 EXTREME - SENDA 50 EXTREME SM - SENDA 50 R
GILERA: GSM 50 - H @ K - ZULU (2001) - RCR 50 - RCR 50 - SMT dal 2006-> (DERBI D50B) - SMT 50
VALENTI RACING: RME-SM (DERBI D50B)
