I don't know what size. You would use the drill bits to figure out the size, then go a few numbers higher.
If you've had it running for a few minutes, will it immediately die if you turn the choke on?
I have only tried that I think once or twice but it was decently warm and yes it wanted to keep running. The last time I flipped the choke on and it ran on for a bit so I flipped it off and then back on and it did eventually die. When it’s been rode for a while and I do that at the end of the day for better starting the next day it’s a bit quicker to kill but it does take a few seconds or more.
If the engine is at operating temperature or close to it it should kill instantly when the choke is flipped on.
I can try chasing a torch tip cleaner through them when I take them off again. I was able to blow through all of them and they all seemed about the same for resistance. I stuck the carb cleaner can straw in them and sprayed and I got fluid to come through and out the other holes. If it's likely partially plugged though I'll gladly try it. I would love to get this thing to start like it's supposed to.
Make sure all the passage in that jet circuit are clean in the carb body.
This isn't where the choke plunger is. Just to be sure, I'm talking about the round brass piece that is right beside the pilot jet that is only removable with pliers or vice grips as they are pressed into the carb body.
I think he’s talking about the pilots.
Right I’m on the same page. Long brass tube with tiny hole that reaches down into the bowl. I haven’t removed it but I put my mouth to it and made sure I could blow through each of them. I also sprayed carb cleaner and compressed air through them. They are definitely open to some degree but maybe partially blocked like you said.
I’ve had pilots and main jets out. They are clean and I even went up from a 42.5 to a 45 pilot. I ran 01 main jet specs last season that are a touch richer than the 00 or 02 jets. I went back to the stock 02 jets this season because plugs just looked a bit dark or richer. I heard some guys run the richer jetting to avoid the dcs from tripping but I’m not sure I would have a problem with that. I always run good ethanol free premium.
Ok, yes we're on the same page. Run torch tip cleaners through them.
I took carbs apart again and made sure everything was clean again along with running torch tips cleaners through the choke tube. I used several sizes and maybe even enlarged the hole slightly as I kept running the largest one through many times. I put everything back together and got the sled running. I waited 7 days and gave it a try. The sled started in 5 pulls with full choke on. Not 2-3 pulls like would be nice but 5 pulls is a huge improvement over 40-50. I'll let it sit longer and see what I get.
Sounds like a good start!!
Pun intended? lol. Yes big improvement!
Realized after I posted. Lol.
I'll see if I can't find some fine bits. I have an uncle that had a new 98 600 and he kept talking about it fouling plugs and being so rich when he first got it. He was a Yamaha tech at the time and mentioned having to make some carb changes to fix it. I may give this a little time here and if five pulls is the best it dose I'll try opening that choke jet up.
I know of a couple 1998 srx600 and 700's still, and they still have plug fouling issues to some extent to this day.
Had the same problem like many others with the 600/700 triple. Installed a fuel shut off and a primer on my 99 600 triple. Starts first pull.
That works too. I bet it's especially handy where you live!
