from memory,between carb 1 and 2 there is a metal t piece joining the carbs with the top pipe (6mm aprox)being the fuel input from the tank,not sure but there might be one betweencarbs 3 &4 also.if vacum tap on tank connects on cyl 3 or 4 inlet rubber.allother inlet stubs blanked off
caine
June 2008
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