Dellorto carburetor 12. 5 venturi diffusor kit Rotax oem

By end of 2005 (to improve the idle and respond of the carburettor) the calibration of the carburettor has been changed in the following way. Outer & inner idle jet, size 30 à 30 with Floats 5,2 gr. Outer & Inner idle jet, size 60 à 60 with Floats 3,6 gr At the same time also the carburettor insert has been changed from 12.5 to 8.5 The figure 12.5 or 8.5 is an indication for the size of the bypass hole just after the venturi (see arrow). As both carburettor inserts (12.5 and 8.5) have been originally supplied with the engine, both carburetor inserts are legal to be used in the ROTAX MAX Challenge. The actual serial production carburettor is equipped with a 8.5 carburettor insert. As we receive an ongoing demand for carburetors with insert 12.5, we have decided to offer a carburettor insert kit to enable an exchange from carburettor insert 8.5 to carburettor insert 12.5. Carburettor insert kit 12.5 ROTAX part no.: 281820 Recommended retail price 2009: $126.88 per kit. The kit will be supplied in a carton box together with a "repair manual" (in English language only) for the correct disassembly and reassembly of the carburettor (see attached file). n Attention: The exchange of the carburettor insert kit may only be executed by a trained ROTAX service center/dealer. CARBURETTOR INSERT KIT 12.5 2009 10 13 INFORMATION 2009 10 13 Page 2/2 Without commitment to advise modifications ROTAX MAX Challenge The carburettor insert will become part of the technical regulation for the RMC 2010. Both versions of the carburettor inserts (12.5 and 8.5) will be legal to be used.