Main Jet should be#130 (it´s written on the jet-body)!! Dont know the part number...
But, what do you want with the JET PILOT AIR (Think you mean Pilot Jet, which is #17.5 in ALL versions)? You don´t need it for a K4.....
BUT: You will need the modified piston valve instead.....
There is a official set with all needed parts for the open K4/5/6 at your Suzuki dealer - including the 2 main jet and 2 piston valves! Thats all - no more parts needed!!
Btw: The open K4 has about 35KW not 33KW....
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