1990 kawasaki x2 650 running problems

[steve45]

The fuel pump is driven by crankcase pressure, so it will feel like a pulse. Everytime the piston cycles, the pump pumps.

I agree with Jeff, time to look into the carbs.

[krsdj1]

The fuel pump is driven by crankcase pressure, so it will feel like a pulse. Everytime the piston cycles, the pump pumps.

I agree with Jeff, time to look into the carbs.

Thank you steve i appreciate your post.Thanks for the help
chris

[krsdj1]

Tooday i rebuilt the carburator.I carefully cleaned all the parts well.I replaced all the

gaskets and diaphram.I used a wire brush to lightly clean all the edges of the metal

surfaces were the gaskets were conecting to. I tried out the jetski and could not get it to

run off the carburator. I can spray a mist of carb cleaner in the carb and the engine will

fire and run for a few seconds. I hope i put the diaphram in properly.There were 2 sides of

the diaphram.One side had an aluminum plate on it and the other side was rubber.I looked at

the microfiche online and realize i put the proper side of the diaphram together.I get

spurts of gas coming out of the fuel line that connects to the carburator.I have 2 fuel

lines connected to the carburator.The return line and the main fuel line coming from the

pump.Im sure the 2 fuel lines connected to the carb are correct because there are different

size hoses and can only be connected a certain way.I can hold my hand on top of the carb and i

feel a nice vacuum.I did not turn adjust or replace the spring on the high and low needle valve

jets. Do you think i should mess with these jets since i have never adjusted . them? The only

other thing i did was install an inline fuel filter, in the right flow direction,from the fuel selector,reserve switch to the

out fuel line going to the pump. Can this fuel filter cause a problem? I am stumped here any

suggestions anyone ? thanks all for your time
chris

[Jeff Walkowiak]

the round metal disc on the diaphragm goes against the needle actuating arm in the carb, I would remove the low speed adjuster and blow compressed air in the hole, then reinstall it to 1 +1/4 turns out, see if it runs remove the high speed adjuster blow it out and start with 5/8 turns out then play with the low speed adjuster by 1/4 turns out till it runs, I have had issues with the low speed circuits on those older carbs in the past.

[krsdj1]

the round metal disc on the diaphragm goes against the needle actuating arm in the carb, I would remove the low speed adjuster and blow compressed air in the hole, then reinstall it to 1 +1/4 turns out, see if it runs remove the high speed adjuster blow it out and start with 5/8 turns out then play with the low speed adjuster by 1/4 turns out till it runs, I have had issues with the low speed circuits on those older carbs in the past.

Thanks for. Your help Jeff I will try thee needle valve adjustments this evening. Is there a possibility that my inline fuel filter is a problem as to were I installed it. I was thinking I should have installed it on the line going into the carb. Can the inline fuel filter be causing a problem. Wow I hope the needle valves are the problem because I want to ride. Thanks for all your help.

[krsdj1]

the round metal disc on the diaphragm goes against the needle actuating arm in the carb, I would remove the low speed adjuster and blow compressed air in the hole, then reinstall it to 1 +1/4 turns out, see if it runs remove the high speed adjuster blow it out and start with 5/8 turns out then play with the low speed adjuster by 1/4 turns out till it runs, I have had issues with the low speed circuits on those older carbs in the past.

I was wondering can the high and low needle valves prevent the carb from getting gas

[krsdj1]

Today i removed my high and low needle valves,cleaned them good and blew compressed air through the holes.I also used carb cleaner to clean any residue that may have been in the holes. I turned the jets out exactly as jeff said.I tried to start the engine and nothing.I turned the low out a 1/4 of a turned and tried to start again,nothing. I tried a few more times until i made one complete turn,nothing.The engine still starts with carb cleaner. Theres a small hole or opening on the side of the card were the diaphram is just behind.with my carb cleaner straw i pushed the diaphram in and that let a small spray a fuel in the intake,and the engine ran for a few seconds. I am stuck here.The only modification i did was put the inline fuel filter on.I guess my next option is to remove this.Can my inline fuel filter be causing a pressure problem? im stuck here does anyone have any ideas?????

[steve45]

When you disassemble the carb, all the little holes and passageways need to be blown out. Don't use any metal tools to clean the holes because the size on some of them is critical. Also, when you adjust the mixture screws, turn them in until they just seat, then turn them out. NEVER tighten a mixture screw or you'll ruin it (or the carb body).

Did you find any debris in the carb when you took it apart?

One more thing, when you put the needle valve in, did it have a little clip on it to open it?

[Jeff Walkowiak]

the little hole is for venting the cover to allow the diaphragm to work, you may have a stuck or dirty needle and seat I would remove the carb and totally disassemble it clean it and blow out all the passages with both needles removed also those needles have o ring seals if they are no good they allow air to get sucked in as for the filter it is simple to remove it and try to see if it is causing the problem,, I think that the carb is probably the issue though and it sounds like you are not familiar with them so you overlooked something the tang for the needle and seat should be set at level with the carb body,, I would go back and do the carb correctly any dirt in a passage will prevent it from running

[krsdj1]

When you disassemble the carb, all the little holes and passageways need to be blown out. Don't use any metal tools to clean the holes because the size on some of them is critical. Also, when you adjust the mixture screws, turn them in until they just seat, then turn them out. NEVER tighten a mixture screw or you'll ruin it (or the carb body).

Did you find any debris in the carb when you took it apart?

One more thing, when you put the needle valve in, did it have a little clip on it to open it?

good morning steve and thanks for the help.I took my time with the carb and blew it out with carb cleaner and a compressed air.I never used any tools to clean it besides a wire brush only lightly to clean the ends were the gaskets go.I did not use any silicone on the gaskets just put them on as is.I did not see any debree at all the carb was clean.The high needle valve had a plastic clip on it and this looked like it was to prevent it from turning.