Carburetor Tuning Nk201.29Tuning CarburetorAllows very good cold start, smooth engine running, very good throttle response and ensures less fuel consumption. Intake connection: 34mm, Air filter connection: 42mm, Main jet: M4 #118. Additional parts might be required! #0662 0954 THROTTLE CABLE SET; #0662 0955 CABLE REPAIR SET; #0934 7166 GASKET KIT YAM; #2101 0458 SLOW JET SET; #2101 0459 MAIN JET SET;