xingyue 260t-4 problem By jenningsjosh (Read 9,262 times)

[Alleyoop]

There is a big difference with no load on the motor, the motor has nothing to slow it down from revving up. You put weight on the rear wheel plus your but on it now the motor has to pull over 400 lbs and move that weight while on the stand NADA.

So I would FIRST SUGGEST to adjust your CARB to get the highest IDLE out of it on the CENTER STAND now that the ENRICHER is shutting off the EXTRA FUEL. See if the rpms go higher with you riding it . If it doesn't then check your weights in the CVT.
Alleyoop

[jenningsjosh]

Been adjusting the carb all morning... about 15 test drives... but i am thinkin the original setting was the best... all other directions and adjustments seem to slightly decrease performance...

the more i turn the screw clockwise the FASTER the rpms go... Do i need to be adjusting my idle as well while doing this? or just leave it alone and let its idle get up to 3500?

If i turn to the left of the original setting the rpms go down

but here is a video... i am sure someone has a simple answer for my confusion

[jenningsjosh]

I dont know how I stopped the reving up after a minute of so... but it quit... I am pretty sure i have found optimal fuel ratio... it doesnt improve my get up and go or top speed though pretty well the same as when i got it from the shop

[Alleyoop]

You turn the Fuel Ratio Screw to GET THE HIGHEST IDLE, then once you found the highest IDLE you THEN USE the IDLE SPEED SCREW which is on the THROTTLE CONTROL WHEEL it has a SPRING on it you turn it COUNTER CLOCKWISE to lower the IDLE. The IDLE, for 250s+ the IDLE should be 1800-2000 wherever it IDLES the smoothest, For 50s+ 1500-1800 wherever they idle the smoothest.

Ok, if you think you got the highest IDLE out of the MIXTURE then it is time to check your VARIATOR WEIGHTS.
Alleyoop

[jenningsjosh]

The highest idle was all the way tight-clockwise- btw

[Alleyoop]

TIGHT CLOCKWISE you mean it was idleing high and the Fuel Mixture was all the way CLOSED!! When you turn a FUEL RATIO SCREW about 1 turn before fully closed it SHOULD KILL YOUR MOTOR from LACK OF FUEL.

If so then you either have TO BIG OF PILOT JET or you have fuel being sucked out of somewhere else.

Did you change the jets in the CARB?? if not is your ENRICHER SHUTTING off after 5 minutes or so? You can test it, Take it off when it is cold lay it on its side where you can see it and PUT YOUR THUMB over the hole and hold it there and start it. Now watch the ENRICHER PLUNGER it should start to EXTEND OUT from its retracted position and extend out about 1/4 of an inch. IF it doesn't touch the ENRICHER it should be rather warm and or hot, if it isn't then it is not getting voltage maybe it is disconnected. If it extends out then NEXT PLACE TO LOOK FOR extra fuel being sucked in is the VACUUM HOSE GOING to the FUEL PUMP or PETCOCK, take the Vacuum line off and see if it is wet from FUEL if it is replace the PUMP or PETCOCK whichever you have. IF ALL IS GOOD FROM WHAT I SAID ABOVE then the PILOT JET IS TO BIG either you changed it or someone before you changed it.
Alleyoop

[jenningsjosh]

I did not change the pilot jet.. I will follow your steps above right now and report back.. she is warm right now so it will be an hour or so

Edit--
Ok i took it off... just waiting for bike to cool down a bit.. just to make sure...
I stick my thumb on hole.. start bike.. watch for small pin to move?.. just wanna get it right

Edit #2--
I went ahead and tried it... i am gonna try it again when bike is 100% cold. but my results this time were... no movement of needle.. enricher not getting hot... if i lift my thumb from hole the rpms go up to about 4500 lol... will try again in about 25-30 mins when bike is all the way cool...

[Alleyoop]

Yea if the ENRICHER plunger does not move out about 1/4 or does not get warm or hot then that means it is not working or not plugged in. AND THAT WOULD BE YOUR EXTRA FUEL that you are getting and why it still runs when you close the Fuel Ratio Screw all the way.

Here is what the plunger looks like RETRACTED(FEEDS FUEL) and when it EXTENDS OUT(SHUTS OFF FUEL).
RETRACTED FEEDS FUEL:



EXTENDED SHUTS OFF FUEL:

[jenningsjosh]

ok... i hooked up multimeter to enricher plug... with key on... it is constantly bouncing around in milivolts... it goes all the way up to 200 milivolts and then drops back down to zero... then bounces up with 200 again and again.... with key off... nothing... so i think i am getting juice to it... bike is still a lil warm yet... gonna give it a few more minutes and will take pics....

In the mean time.... do these pics look correct? just trying to get a feel for everything going on..



If you look at bottom pic under the fuel ratio screw... is that the drain screw? i cant get it to budge either direction.. BAD ANGLE to get on

[Alleyoop]

Just look at the ENRICHER pic I put up when the motor is cold it should be retracted then once you start the motor it should start to extend with 3-4 minutes if it doesn't it is bad.
It could be getting voltage but not extending.

If that is the only VACUUM PORT on the Intake manifold and you do not have any emissions on it that VACUUM LINE should be going to the PETCOCK or FUEL PUMP whichever one you have. The Curved little hose is the OVERFLOW hose if fuel comes out of there that means the carb is flooding.
Alleyoop

[jenningsjosh]

ok.. results are... the needle did not move at all... i think it is staying extended rather than not extending... I did exactly as you requested.. and nothing happened with needle...

the needle is spring loaded of course.. and it Will push in but NOT stay pushed in.. and will not pull out with any type of force...

fuel does not come out of overflow hose..btw.. and yes.. that hose is running directly to the round thingy mabob... guessin its fuel pump because fuel lines run through it as well


NOW... the question is... should i buy a whole new carb? or just try to replace enricher?

I mean i want it to be right... and i have a feeling i need a whole new carb... seems easy enough to replace...

[Alleyoop]

Well you haven't proving to me if the enricher is working or not so I cannot tell you to just get an Enricher. Look at the ENRICHER plunger right now and maybe put a mark on it and leave it out overnight. Tomorrow check it and see if the mark moved toward the holder.

You see the picture I put up I PUT A MARK ON THE PLUNGER a blue pin MARK. Do the same.
Alleyoop

[jenningsjosh]

I used red... here as you requested...



will post tomm another pic

[Alleyoop]

That is RETRACTED that is the way the plunger is when it FEEDS EXTRA FUEL. If when you start the motor it does NOT COME OUT ABOUT 1/4 of an INCH THEN IT IS BAD or is not Getting VOLTAGE. If it stayed that way for over 5 minutes when the motor was running, then one of two things it is bad or not getting voltage.
Alleyoop

[jenningsjosh]

NO it did not extend.... NOTHING happened... i am getting voltage to it.. i tested with multimeter...

on yours--- can u pull it out manually to reach "extended" point? I CANNOT.... I can only push it in...

I dont know if you can tell by pic.. but the shiny ring about 1/4 inch down rod.. that is where it will push into....but will NOT pull out any farther