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Post by alleyoop on Jul 23, 2014 20:51:09 GMT -5
2 1/2 turns on the FUEL RATIO SCREW is a good starting point I think right now you messed up the throttle cable side with the idle speed screw.
ALSO DID you plug the ENRICHER back in?
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Post by blarboose on Jul 23, 2014 20:53:46 GMT -5
No no, the idle screw is fine. I turned it clockwise when I was cleaning the carb, but I turned it back before putting everything back in. The bike will idle just fine now (At about 2000RPMs), but the throttle is still acting up. The idle speed and idle screw are both fine. I looked at the carb where the throttle cable connects, and all that is correct. I started the bike and twisted the throttle, and it all looks normal, but for whatever reason, twisting the throttle seems to shut the bike down.  Ill try and get a video but my phone is almost dead. EDIT: Yes I plugged the enricher back in. And I tried 1 turn, 2 turns, 2 and 1/2, 3 turns, 3 and 1/2, 4 turns... they all end up exactly the same. Bike starts fine (without starter fluid now) idles fine (At around 2000RPMs or so) but when I twist the throttle, the RPMs drop and the bike dies if I hold it for more than a half second. |
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Post by alleyoop on Jul 23, 2014 21:03:14 GMT -5
Do you have the AIR FILTER ON? It is getting to much air make sure the clamps are nice and tight it is sucking in air from someplace.
Also to verify that the PILOT JET is working, start it up and let it idle.
Then start turning the FUEL RATIO screw CLOCKWISE 1/4 at a time and tell me what happens.
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Post by blarboose on Jul 23, 2014 21:08:31 GMT -5
Do you have the AIR FILTER ON? It is getting to much air make sure the clamps are nice and tight it is sucking in air from someplace. Also to verify that the PILOT JET is working, start it up and let it idle. Then start turning the FUEL RATIO screw CLOCKWISE 1/4 at a time and tell me what happens. AHHJHHH!!! That might be it! The air filter is on, but I DONT have the lid to the air box SCREWED ON! I took the screws out and just sort of rested the lid on it, because at first I kept having to spray starter fluid every time! Let me go screw the lid on and see if that helps. In the mean time, I do have a video of the problem in action uploading. Ill post it when its done. I REALLY appreciate all your help Alley! Hopefully we can get this fixed soon. I shoulda been in bed an hour ago for work tomorrow, but thats not gonna matter if I have no way of getting there. XP |
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Post by alleyoop on Jul 23, 2014 21:10:56 GMT -5
Yes what it is doing is bogging on you sucking in to much air. Button it all up should help. Then it is just a matter if seeing that the PILOT JET is working as it should to control feeding it more or less fuel.
Alleyoop
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Post by blarboose on Jul 23, 2014 21:19:33 GMT -5
Ok, here is a video of the problem. Note that this was BEFORE I screwed the lid back on the airbox, HOWEVER, even after screwing the lid tightly shut, the problem was exactly the same.
I did let it idle and then turned the mixture screw, but I was a dope and turned it counter clockwise instead of clockwise. I did INCREASE the RPMs a tiny bit, from around 2500 to 3000. Ill go back now and try doing it clockwise instead.
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Post by alleyoop on Jul 23, 2014 21:23:53 GMT -5
It is lean turn the fuel ratio screw Counter Clockwise the idle is bouncing.
Turn the FUEL RATIO SCREW to get the HIGHEST IDLE
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Post by blarboose on Jul 23, 2014 21:27:24 GMT -5
I let it idle and then turned the mixture screw clockwise. It did indeed cause the RPMs to go down, so we know the pilot screw is working.
Its not a problem of the mixture being too lean. At 2 and 1/2 turns it idles at maybe 2400. But Ive tried it with it up at 6+ full turns, and it does the same thing; idles just fine, but drops when I turn the throttle. It idled at maybe 3000 at 6 turns.
I also noticed that its even the same with the idle screw. If I turn the idle screw clockwise (which should INCREASE the idle speed) it instead drops it lower. And, if I turn the idle screw counter clockwise (Which should lower the idle) it increases it. is wrong with this throttle. O____O
How is this even physically possible? How can twisting the throttle make the RPMs DROP?
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Post by alleyoop on Jul 23, 2014 21:35:34 GMT -5
That is good that means the BUTTERFLY is way open turn the IDLE SPEED SCREW counter clockwise as if trying to lower the idle. When the Idle goes up then TURN the Fuel ratio screw clockwise a little to hopefully lower the idle.
Let me ask did you do anything else when you took the carb off, did you take anything else off the carb or just the TWO JETS.
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Post by blarboose on Jul 23, 2014 21:41:08 GMT -5
That is good that means the BUTTERFLY is way open turn the IDLE SPEED SCREW counter clockwise as if trying to lower the idle. When the Idle goes up then TURN the Fuel ratio screw clockwise a little to hopefully lower the idle. Let me ask did you do anything else when you took the carb off, did you take anything else off the carb or just the TWO JETS. The idle screw is barely turned at all. If I turn it counterclockwise even a couple turns its gonna be not even resting on the plate. EDIT: Look at where the idle screw is in the video. Its in basically the same place now, if not actually a bit further counter clockwise. When I opened the carb I sprayed out the two jets like you said. The only one I actually unscrewed/took out was the pilot jet, but of course I put it back in. I also opened up the top of the carb to replace the diaphragm. |
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Post by alleyoop on Jul 23, 2014 21:45:06 GMT -5
Ah, are you sure you replace the diaphgram right it goes on only one way and was it seated in the grove it could be leaking there.
Concerning the IDLE SPEED screw, let me ask this IS THERE ANY PLAY by the throttle grip before it even moves the control wheel. There should be about 1/8-1/4 inch free play before it actually turns the control wheel. You may have the cable already pulling on the control wheel.
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Post by blarboose on Jul 23, 2014 21:50:24 GMT -5
Ah, are you sure you replace the diaphgram right it goes on only one way and was it seated in the grove it could be leaking there. Concerning the IDLE SPEED screw, let me ask this IS THERE ANY PLAY by the throttle grip before it even moves the control wheel. There should be about 1/8-1/4 inch free play before it actually turns the control wheel. You may have the cable already pulling on the control wheel. Well I mean theres really only one way you COULD put it in. The needle goes into the hole, and theres a little tab around the edge of the rubber part that shows you where it goes. The only thing that could possibly be put in wrong is the spring. And even then that couldnt really go in wrong. I mean it goes between the diaphragm and the lid part of the carb. Im lik 99% certain its seated in the groove properly. There is a bit of play in the cable. But what Im concerned about is that even if there wasnt, that wouldnt explain the problem Im having. Did you watch the video? How is it even PHYSICALLY POSSIBLE that turning the throttle could LOWER the RPMs? I twist the throttle, and instead of accelerating, the engine slows down! |
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Post by alleyoop on Jul 23, 2014 21:59:42 GMT -5
Twisting the throttle and engine slows down means the mixture of air and fuel is not right. Yes the spring can go in wrong inside the cap there is a built in round piece that the spring goes over it may be in sideways and or hitting it and not allowing the needle to rise putting to much spring pressure keeping it down. So when you open the throttle the needle is not rising all your doing is sucking in air by the opened butterfly.
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Post by alleyoop on Jul 23, 2014 22:09:52 GMT -5
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Post by blarboose on Jul 23, 2014 22:36:17 GMT -5
Ok, I have now figured out that I do not have any kind of engine problem. This bike is simply the victim of voodoo magic. So, I figured maybe draining the carb might help. I use the drain hose (the one with the spring wrapped around it) and drain all the fuel out of the carb. Try to start it. Wont start. I expected that, so I spray some starter fluid into the air intake. It starts. AND THE THROTTLE WORKS! ...for about TEN SECONDS. I got it running, and the throttle was working properly. I revved it up, got it to maybe 6800RPMs, let it slow down and go back up a few times. All seems to be working, right? So I shut off the engine. I decide to start it AGAIN to make sure it still works. And, OF COURSE, now its back to the throttle doing the opposite of what it should. -__- So I have an idea... I shut it down and try more starter fluid. Just a quick spray. Start it up, it works RIGHT again! Shut it down. Start it again. STILL working right!  Shut it down. start it up again... And its back to NOT WORKING. Somehow, having starter fluid in the mix when I start the bike makes the throttle work correctly. Starting it normal, without starter fluid, makes the throttle screw up again. And I know youre gonna say the fuel is too lean, but I tried that already. The mixture screw was at 2 and 1/2 turns when I first tried the starter fluid. I tried everything between there and 6 and 1/2 turns, and NO difference at all in the throttle working properly. |
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..BAD TO THE BONE..
