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Post by dragono on Jul 10, 2014 17:51:41 GMT -5
Now I am I seasoned 4 stroke guy. However im relatively new to 2 strokes. I bought this one and here are the issues:
Tire is a bit hard to turn, harder than usual when on a centerstand
(I only mention this is the more info the better)
However my main issue is that it runs and starts up and will idle perfectly fine, I recently purchased A new carb for it since the old's gasket was chewed up somehow.
I can get it to idle and even got it to throttle all the way up one time, took her for a ride around block then and only made it half way. I would give her gas I could feel her giving out so I would back it back just to see if she'll make it home then a second later I have to repeat the process all the way until shes dead.
If It makes a difference my petcock seems to be going bad and is on permanent "dribble mode" .
My gut tells me its a simple fuel flow issue but with a brand new carb I shouldnt have this issue.
Any ideaS?
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Post by alleyoop on Jul 10, 2014 19:01:55 GMT -5
CARB and PETCOCK are two different things, you can have a GREATA CARB BUT if the petcock is bad then no gas gets to the GREAT CARB.
DO this take the Fuel hose from the tank to the petcock and put the FUEL FILTER on and the other end the hose going to the carb. That way you are eliminating the PETCOCK for the test. Take the vacuum line off the PETCOCK and bend it over and tie it for the test.
That will tell you if it is the PETCOCK not allowing enough fuel to the carb and the carb running dry or to low for the jets to suck up fuel.
Alleyoop
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Post by rexxk on Jul 10, 2014 19:30:21 GMT -5
your petcocks bad.
erm if the rear wheel isnt spinning very good. are your back brakes too tight? you could take off the cvt, and get to teh final drive cover, and take it off. youll probably break a gasket doing it. and look it there open it, to see if its messed up. if not, as long as nothings missing, it should run fine. if the bearings are fine.
dribble mode pretty much means your petcocks screwed up. you can take it off and try to clean it, with like carb cleaner or soemthing.
as long as gas doesnt come out the vacuum side. cause it would flood your motor. if you had the vacuum line hooked up to the carb. or intake.
what bike? if the vacuum side isnt got gas coming out of it, the needle float in the carb will keep it from flooidng you out. as long as your floats set right. if you have gas coming out of your carb, then the floats, not set right, maybe, or the seat on the, pin that stops the gas hole up on the carb is dirty or torn up. if its leaking you can clean it with toothpaste like, a light scratcher.
itll smell a little gassy doing it that way. as long as the vacuum side doesnt leak you can still use it.
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Post by dragono on Jul 10, 2014 20:14:02 GMT -5
Well Let me clarify. The pet cock "dribbles" when its hanging below the height of the tank (with the engine off) . However I still get decent flow when the I apply vacuum to the other line that goes to it. I had ordered another petcock for it anyways but getting the old one off the tank is proving to be a hard time (its an Eton Beamer 06) And i'd rather not have to buy a new tank if I don't have to. However to make sure its not a problem Im going to take an old tank from out back and attach the new petcock and see if anything changes. As of now i'm not seeing any gas leakage. However if I choke it manually I do seem to get better results maybe because the vacuum is a bit better? I dunno 2T's are a slightly different game to me. Maybe my reed valves are going? What would be signs of that?
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Post by rexxk on Jul 10, 2014 21:57:32 GMT -5
unhook carb by the clamp,and look down in it, they should be sagging or cracked. i think yamaha, have metal reeds. better would be .3mm carbon fiber reeds. better response. if there not sealed, you mihgt break gaskets doing it, if they dont seal against the cage, if there sagggin a little, theyre worn, wearing. if there broken, chipped, there leaking and need replaced. if theyre metal and are broke, you mihgt want to chcek it you might of just caught it, take the top end off, you can watch videos on the internet. you can hold the rings against the piston and slide the cylinder back on, you mihgt break a, base gasket.. rip one.
and well, get the clyinder off and take the motor off ad wash out the bottom end with gas a few times. to be sure no metal is in there.
your carb might just be stopped up. if you broke a metal reed and it went in your motor it might, scratch the cylinder, get in a bearing and break it. its better to get carbon fiber, theyll pretty much shoot out. is what i heard. just replace your carbon fibers, like ever 3-4000 miles ive heard. fiberglass more like 4-6000 miles. earlier to be on the safe side of both of those.
your carb might just need cleaned though. the jets. maybe the pilots stopped up. maybe the whole carb just needs took apart, find some diagram of it, online with all the parts took out. like, where you can buy all the individual parts of it, and take it apart, and blow it out with comporessed air, then clean it out, spray it out with carb cleaner and go back over with compressed air and look down your jets to make sure there clean.
you can unhook carb without breaking a gasket.
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Post by dragono on Jul 11, 2014 11:56:49 GMT -5
I took the carb off everything looked fine. Put it back toether and back on and she rev'ed up fine. Took her around the block just fine. Got back and put plastics back on and was going to go fill her up and as soon as i left the drive way same issue. My gave it WOT and she wasnt havin it. Did a quick plug chop and it was almost perfect (brown color).
Im going to repeat what I did earlier and see what happens. The new carb I got is almost exactly the same. The pilot jet just isnt recessed as up into the carb as the old one. The main jet seems to be the exact same one. And it looks the exact same.
I dont get it guys.....
Will report back soon.
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Post by alleyoop on Jul 11, 2014 12:26:47 GMT -5
Take a picture of your fuel delivery SETUP from the tank to the carb.
Alleyoop
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Post by dragono on Jul 11, 2014 14:02:37 GMT -5
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Post by alleyoop on Jul 11, 2014 15:45:44 GMT -5
Question do you have the AIR FILTER on in the picture it looks like NO air filter. Also Looks like you do not HAVE the ENRICHER plugged in, if so that is feeding a lot of fuel. You can go to the hardware store and get a gas coupler and a connector to come down to the size of the fuel hose, like this and then you can buy a Petcock that you can mount where you can easly get at and not worry about on that attachs to the tank. Alleyoop  |
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Post by dragono on Jul 11, 2014 16:40:52 GMT -5
YESSS WHERE DO I BUY THIS!!!! Where do I buy the gas coupler. I'm also searching the internet as we speak.
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Post by alleyoop on Jul 11, 2014 17:39:51 GMT -5
YESSS WHERE DO I BUY THIS!!!! Where do I buy the gas coupler. I'm also searching the internet as we speak. At your friendly hardware store they will have both, just get the right size Gas Coupler and it will thread right on BRO. Take a piece of your fuel hose so they can match the down sizing piece that will screw into the coupler, and it will be only be a few bucks  Alleyoop |
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Post by dragono on Jul 11, 2014 17:41:47 GMT -5
Nooo my thread is fine. And I've looked in 2 hardware stores all they have are course threads.
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Post by alleyoop on Jul 11, 2014 18:06:04 GMT -5
WOW!! My ace has fine thread couplers, some carry more than others if not go to HOME DEPOT OR LOWES. If none for gas then ask for brass coupler for water they are usually fine thread so they do not leak. Also you can get a  % brass fitting as well it does not have to be just like the one in the picture. Some already have the down sized hose connector built on them already and it is one piece. WHAT SIDE IS THE TANK CONNECTOR, 7/8 , 3/4 , 1/2? Alleyoop |
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Post by dragono on Jul 11, 2014 20:28:59 GMT -5
Ok so I made another system to use the side petcock that I had on another bike and it still dribbles a little bit. (same with the new petcock I had epoxied on there) Guess thats just how it is. And Guess what its the same deal. Every time I take the carb off and then put it back on it can WOT for about 15-30 seconds. And then she starts to give out. Made it half way around the block this time. Im tired of walking it back.  I even tried the old carb. She idled just fine then BLAM dies at WOT. I dont understand. If I take the fuel line off the carb while its running fuel is flowing nicely. I get the same issue from 2 separate carbs. I even lowered the needle (raised the clip) on the new carb just incase it was getting too much fuel. Usually if shes too rich I wouldnt be able to WOT at all. (atleast on a 4 stroke)  Im halfway between taking a torch to it and crying my eyes out over a bowl of ice cream. Anyone?!?!?!?! |
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Post by alleyoop on Jul 11, 2014 21:01:29 GMT -5
Get a video going on the center stand and open it up on there I want to hear it running and cutting out.
Have you checked the compression on the thing. If low compression it will not create enough suction to work the petcock.
Now you can try this just get a hose and go from the tank to the carb just straight feed that will tell you if its either the carb or the motor.
Alleyoop
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..BAD TO THE BONE..
% brass fitting as well it does not have to be just like the one in the picture. Some already have the down sized hose connector built on them already and it is one piece.