Dear Members

I'm from Sri Lanka and recently brought a Hornet 250 CC, chassis 115 and engine MC14E (yom 98). when I check the Spark plugs colors 1,2 bit a dark and 3,4 are look pretty much ok (white). I went to technician and he check and said carb 1,2,3 all got 88 size jet and number 4 got 90. he said this is wring and 90 should be on number 2 carb as number 2 cylinder got vacuum pipe which is goes to fuel tank switch .

when I check with another technician . he said this is correct and number 4 carb should have 90 jet. I'm in a bit a confusion here and looks no one is really know the actual scenario.

can you advice me what is the correct jet size of this bike and why 1,2 plugs are bit a dark than others. is there any other things can happen on this carbs

thank you

sira