650/X-2 HELP. Whats wrong

[mike b]

Ive been searching to find a decent diagram of the fuel system of the kawi 650 system. I have the fuel pump with the single end facing the fuel regulator (feed from gas tank), the top of the fuel pump going to the bottom of the carb (feed line I believe) the other part of the fuel pump has a marking that looks to be two P's facing each way which im assuming is pulse going to the case. And lastly the top inlet of the carb going back to the tank as a vent line. IS this right? I see fuel moving through these lines and just hoping nothing is backwards

 

[Byeai]

Yes it's right

 

[mike b]

Thats what ive thought. I don't get it then. Will soak carb in gas over night or just choke it up more when trying to get it to start and maybe the vacuum will begin to work

 

[Byeai]

Put ur hang over the carb and start cranking

 

[mike b]

I was doing this till my battery died earlier. Will charge up my portable battery box and try again in the morning

 

[Byeai]

Still didn't try to start? Is ur needle and seat good? What did it do

 

[mike b]

Ski would start when i put starting fluid but when i tried to cover carb my battery was dying so i stopped. One thing i just thought of i bought this motor from a guy who pulled it out of a ski and ive never checked if he has messed with any of the adjustments. not sure if this would have affects off idle. I need to find settings and then I will be able to clarify that

 

[Byeai]

Take off ur diaphragm plate and check the needle and seat if it moves freely

 

[mike b]

Okay so here is where im at. Got a new diaphram and gasket installed. I checked the needle and spring mechanism that moves fine and needle point was clean. So far I have used two different stock carbs, and two fuel pumps and nothing is working. What is weird is I can still see the fuel in the lines and the return at the carb so fuel is moving to the carb and at the inlet but is not going into the carb. Should I take out the jets and clean the whole thing. One of the carbs was a working one from a sitdown I parted last year. Never had this much trouble with a 650 motor. It will fire up and run when gas is poured down the carb but once it runs out it dies. Seriously need help now since I have no more ideas left on what this could be since the fuel is cycling to the carbs. anybody have any ideas?

 

[Byeai]

If u hold your hand over the carb throat and crank for a little does it get fuel on ur hand

 

[mike b]

thats hard to test because it has the stock flame arrestor half but i kind did this once and no. carbs are dry each time till i pour gas in

 

[Byeai]

Take off the arrestor and 3 or 4 bolts and cover the throat completely

 

[mike b]

Okay will try this in the morning. What would be the case if still dry, or you thinking this will help with vacuum?

 

[Byeai]

If still dry something is clogged and not opening I had this issue on a 650sx with sbn 38 the needle and seat was frozen shut when you checked the diaphragm was there fuel inside that area

 

[mike b]

Diaphram was dry. and this is stock carb which i believe is the kiehin 28mm?

 

[Byeai]

So something is clogged ur not getting fuel anywhere near where it needs to be

 

[mike b]

Okay. well what makes the fuel go through the inlet and out the return feed without going through the carb first. i would have thought it would have to cycle throughout.

i just find it weird that both of the carbs are having this same issue. could i test this by removing the jets completely and then cranking motor over and see if it spits gas in. Obviously take off plug wires so motor doesn't fire up. Or without jets in the carb will it not have the needed pressure?

 

[mike b]

Okay took the carb off and apart again. there was a small amount of fuel inside the window section between the carb and the diaphragm. Put all back together and had fuel inside of the carb when i put it together, cranked over and same thing. Cycles the fuel as far as i can tell because im seeing movement in the return line. Only starts up once fuel is put down the throat of the carb. Im all out of ideas now. I think its something else because it seems odd that both of these carbs are messed up.

 

[mike b]

Well I can tell the guy who had this engine before me didn't know what he was working with. Another case of oil in the flywheel cover window. So while all this drains into my clean hull while i replace the flywheel with one that already has the block off plate I guess i will let this dry. Will this cause the ski not to run tho? It was running when i threw gas in the carb? Is this just an extension of bad luck or what?