One of my 4 Header Pipes is Cold!

[decdrummer]

Bike: 2002 Katana 600 | 6500 miles

Ok, I stumbled upon this problem after rebuilding the carbs. At first, header pipes 2 & 4 [looking from Left to Right, sitting on bike] were cold upon startup(idle). I cleaned all the spark plugs, reinstalled, pipes 1, 2, and 3 are now getting hot, however header pipe 4 is still cold. I switched spark plug 3 & 4, and 4 is still cold when idling, 1-3 are hot.

My question is, are all 4 header pipes supposed to be hot when idling?

If so, are there any tips on how to get this cylinder [4] to fire? Or is it a coil problem?

Thanks for any responses y'all!!!

[arsenic]

yes, they are all supposed to get hot. I would start at the pilot jets, but you already did that.

[decdrummer]

Yes I did, but it's worth a tear down, re-cleaning to avoid future frustration! However...I haven't messed with the screws on the bottom of the carbs yet...the ones with the brass caps on them.

[Wild-Bill]

Then you haven't cleaned the carbs. Get those things cleaned up and see what you get. Entirely possible #4 is cold because there's no fuel going in there.

[decdrummer]

Good Deal! Thanks guys, I'll get on it tomorrow and hopefully post good news!

Not to nag, but IF it happens to be the coil, would all coils from 98-06 fit? With regards to it being a 600 motor?

Thanks!!!

[arsenic]

yes, actually 88-06

[decdrummer]

Thanks a lot! I found out with a tester that the coil/spark plug is actually working properly, the cylinder, however, is not getting fuel, so I shall fix this issue tonight!