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Thats a gasketed head so use the fitting circled in red not the one in blue.

Yes. Is it an o ring head or stock gasket? If its a stock gasket head plug the back one.

If using one line out of the head use the front line. The westcoast and stock head gaskets have the same waterjacket holes and they are designed to use a single line out of the front of the head. When i use two into one out of the head and into the pipe i even out the hole sizes in the head...

Looks like you have one line out of the head going to the exhaust head pipe and one going to a pisser? If your running single cooling delete the line on the rear of the head going to the pisser. I cant tell whats going on with the rest of your cooling lines.

You can get email notifications I think. If your popoffs too low the ventury will dribble. Yamahas are known for that but your kawi should be fine.

The only thing i can tell you is to get a tester and figure out what the preasure was when you started (origional spring) and work your way down. Its going to be a combination of popoff and pilot. I made a popoff tester you can plug into the compressor. Got the 30psi guage for cheap off ebay...

120 pilot and 147.5 main is correct. 145 main is what factory pipe recomends. It looks like your popoff is too high. He told you to use a 95 gram spring which is what factory pipe recomends but your running one screen. Drop your popoff.

If your not getting fuel to the carb then pull the carb appart. That was your problem.

Ive set up many B piped 61x's with 44sbn's and never had an issue.

Clean the whole fuel system. Pull carbs fully appart, blow out fuel lines and put fresh gas in it. Dont have the dealer do it , do it yourself . Its a simple job.

Home made. Not enough room on the bars for something that clamps to the bars.

Post a few pictures of your setup. Did you use the drain line from the stock pipe by mistake?

The fire extinguisher is not for your ski, its in case your buddys ski catches fire. Seems this guy had no buddys.

I wish i knew but i have a carb thats been old faithfull for me for fifteen or so years. An old school taper bored 61x carb. If me or someone i know has an issue out comes this carb to rule out if its a carb issue. I also can pull all moving parts out of this carb and put it in the troubled carb...

Before you get too frustrated understand that carbs can go bad. Ive had quite a few that were gutted for parts. I had a brand new 46 with about a months worth of ride time last year not work for the life of me this year. A different carb and all is good again.

Wetjet put out the Kraze, single 46 , high comp head, westcoast exhaust. From the factory it had a 1.5 N/S with a 107.5 pilot and 145 main. Thats on a couch that runs wot all day long with mindless retards behind the throttle. Thats a factory craft under warrantee. Your setup is almost the same.

Post a picture of your pluggs.

Your 160 is too big. Trust me. Something else is wrong. Snag your buddys carb off his perfectly running ski and try it on yours.

Also if you cant get it to run right with the balpark jetting i gave you then try a different carb. Also is your pump side of the carb leaking? You need to use a popoff guage and bring the preasure up to just before it pops off and if the carb doesnt hold a steady preasure spray some windex on...

It says in the mikuni bible that the smallest N/S will flow more fuel than needed. It also says to use the smallest N/S while obtaining the required popoff. If your running out of fuel on the top with a 160 then somethings wrong. Its not your N/S. Im running a 150 main in a 771 big bore yamaha...