I REALLY NEED HELP...video to explain.

M

memphis

Active Member
ok. I just put my carbs back together. I hit the ignition, it idles, then I turn the throttle.....it dies!!!!! WHY?!?!?!?!?!
It was missing before I cleaned everything. But, now it's a whole lot worse.Can anyone help me?!?!?!?!?!?!?!
also, where can I get bigger jets and main needles for a 81 cm400e?

here's a video

http://www.youtube.com/my_videos_edit2?ns=1&video_id=iLe_5od_Oyg&next=%2Fmy_videos2%3Fpi%3D0%26ps%3D20%26sf%3Dadded%26sa%3D0%26sq%3D%26dm%3D1

excuse the messy garage.
 
I've never worked on anything but mikuni vm style carbs on kz's, but I'll take a crack at it. With pods and no muffler you increased your airflow A LOT, if you didn't rejet the carbs to accommodate that you're running stupid lean right now. When you pull the choke on it makes the mixture much more rich, which if you didn't increase your jets could explain why it's running on the choke circuit but not off of it. A lean mixture will cause a high idle as well. I'd bump your jets up and see if it doesn't smooth it out some. Also, try spraying carb cleaner on the carb holders while it's idling, if the idle changes at all you're dealing with an air leak where the carbs mount up.
That's about all the speculation I got...hope it helps.
 
sounds counterintuitive but check your battery voltage and timing too...



memphis said:
ok. I just put my carbs back together. I hit the ignition, it idles, then I turn the throttle.....it dies!!!!! WHY?!?!?!?!?!
It was missing before I cleaned everything. But, now it's a whole lot worse.Can anyone help me?!?!?!?!?!?!?!
also, where can I get bigger jets and main needles for a 81 cm400e?r b

here's a video

http://www.youtube.com/my_videos_edit2?ns=1&video_id=iLe_5od_Oyg&next=%2Fmy_videos2%3Fpi%3D0%26ps%3D20%26sf%3Dadded%26sa%3D0%26sq%3D%26dm%3D1

excuse the messy garage.
Click to expand...
 
Well I can't watch flash video on my iPod ,but I agree with anarki. Thats exactly what happened to my cb400. you can get jets from Z1.
 
Z1 ? I unfamilier....

anarki...that's what I thought, the only wierd thing is that it worked just fine (lean, yes...but ran) with the filters and sans muffler...so did I screw something up when I cleaned them? I'll try the air leak tip...thanks ya'll....keep the ideas coming.
 
Not sure what kind of carbs are on your bike so I'm again purely speculating here....
BUT, when you tore them down to clean them did you reset any adjustment screws to the exact positions they came out from? On my vm carbs there are air and/or pilot screws, pilot screws provide a lot more adjustment than the air screws do, but either of them not adjusted right will make the bike run like dog shit. Is it possible that adjustment screws are out of wack, combining with the too small jets and making it run like shit?
 
your absolutely right!!!!! that's how mine are...I guess I'll hafta play with it to get things back to where they were....YOU GUYS ROCK!!!
 
johnson_steve said:
Sorry.

www.z1enterprises.com
Click to expand...

Thanks for the link....I looked...forgive my ignorance, this is all I could find. Is this what I need?
http://www.z1enterprises.com/detail.aspx?ID=1964
I'm new to carbs...can't you tell ;D
 
Those are the float needles, which shut off fuel flow when enough gas is in the bowls. You need jets. Z1 should have them listed under the carbs section for your bike. If they're not listed, call them tomorrow during business hours and I'm sure they'll help you find them.
 
On the Mikuni carbs you adjust the air screws to a baseline of 1 1/2 turns out from snug. Once the bike is warmed up you slowly turn the screws in until the bike starts choking and then slowly turn the screws out until you hear the bike hit the highest idle. Repeat that step with how ever many carbs you have and you should make some improvements.
 
Can't help you... looks like everyone else did. ;)
Just wanted to say that's a pretty cool idea with the video.
Way easier to troubleshoot then typing your problem.
 
yeah +1 on the video. i also new to this whole working on motorcycles thing. its one thing to read the manual, but if you dont really know what the parts are or what they do, you still have trouble getting the desired results. even explaining what is going on can be difficult. having a mechanical set of eyes and ears around has been invaluable. the video is a great idea.
 
thanks guys, the iea just came to me. I figured it was WAY easier than typing out my problem...especially since I couldn't really explain it.

Ok are these the jets that I need to go bigger with?
or-here.jpg
 
no, those are your idle screws, the jets are on the inside of the bowls, you'll have to take off the bowls to get to them.
what you're looking for is a tube that comes down, it lines up with the needle that you see when you look through the carb barrel, and at the bottom of that tube is usually a brass nut, at the bottom of the nut is a little brass screw or nut (some have a flathead slot, others have 6 sides), it will have an even smaller hole in the middle if you look at the bottom of it. This is your main jet, it is partially responsible for controlling the amount of fuel your engine gets when the throttle is open. if you carefully unscrew it, you should see a little tiny number on the side, usually 125, 130, etc. that's the jet orifice size, if you take the jets to a bike dealer who does metrics, they can usually hook you up with a larger size, for your mods, I'd probably go with a number that is 10-15 higher than your base number
 
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