smoking pipes

[mynameistrey]

okay so I've had the bike for a couple of months now. Ive done some trouble shooting and i've changed the valve cover gasket because of a leak. and I found out the oil plate had been cracked, so i had that replaced. It had been dripping oil on to the exhaust underneath causing it to smoke. I had to unbolt the exhaust and move it to the side to get at one of the three bolts holding in the plate. So i finally cranked it back up today to see if these 2 repairs had worked. And it doesnt look to be dripping at all anymore. But the exhaust is still smoking in that spot. I dont know if maybe while moving the exhaust I might have loosened the joint in the middle. Here are some pictures

this is when i first got it.
http://i1114.photobucket.com/albums/k522/youreaclone/IMG_2038.jpg?t=1340154834

then i got a new plug
http://i1114.photobucket.com/albums/k522/youreaclone/IMG_2057.jpg?t=1340154817

finally got the plate off today because one of the pipes was blocking one of the bolts
http://i1114.photobucket.com/albums/k522/youreaclone/IMG_2081.jpg?t=1340154912

so this is from tonight when i cranked it up finally. its been sitting with no oil in it since i put the gasket in for about a week now. sorry for the crappy night pix

http://i1114.photobucket.com/albums/k522/youreaclone/IMG_2083.jpg?t=1340154872
http://i1114.photobucket.com/albums/k522/youreaclone/IMG_2088.jpg?t=1340154911
http://i1114.photobucket.com/albums/k522/youreaclone/IMG_2089.jpg?t=1340154943

As i said it seems to be smoking in that spot still where that joint is, i dont know if maybe i loosened it because it did loosen that big bolt there thinking it held the exhaust in place. I'm pretty new at this stuff as this is my first motorcycle. I havent been able to ride it very much, or for long distances without it leaking. So I've been trying to get it all fixed up. Any help would be greatly appreciated.

[5th_bike]

That's probably just some old oil that's still burning off, it should get less and less - you repair looks good.

[mynameistrey]

i think youre right. I'll have to be sure in the morning. It seems to still be smoking around where the left header goes into the engine. Ive been using oil treatment and a lot of seafoam would this cause it to smoke in some areas?

[jonathan180iq]

Nice work man. Glad you got it all sorted out.
And thanks for the pictures. People love pictures. :)

[GZ250]

when there is an oil burning issue (smoke) the best thing is to wash the area using the car washing detergents and clean it up good. if there is already oil burnt on some area (gooey that is sticky also) use kerosene oil with bruch to clean the oil and then wash. That will give you and clean slate to start with.

in the picture the joint is not marked. are you talking about the one that is closer. start he bike and when its hot see of the smoke is like fumes like a drop of oil burns on a hot plate then probably it is old oil but it should not last very long. Just as you start the bike (when the exhaust is not hot) rev up the engine and bring your hand close to the joint and try to feel any air around the joint.

GZ does not smoke and you should not SEE smoke from that part of joint just FEEL it, OR you piston and rings are bad.

[mynameistrey]

Soooo, i cranked it up yesterday and it ran great! Tightened the 2 bolts at the exhaust head and no smoke no oil! I'm super pumped all my fixes worked. Thanks for the help, i guess i just freaked out a little early. Was able to take it for a longer ride today, was able to stay past 50 mph for a long period of time, stopped and hopped off and everything look great. Thanks for all the help!

[mynameistrey]

It does feel a little jerky when i try to cruise at a certain speed, around 25mph is where i feel it the most. Is that carburetor related? Theres also a hole drilled into the top of my air box, could that be the problem?

[Road_Clam]

It does feel a little jerky when i try to cruise at a certain speed, around 25mph is where i feel it the most. Is that carburetor related? Theres also a hole drilled into the top of my air box, could that be the problem?

Did the bike sit unused for an extended period of time ? Is there fresh gas in the tank ? You might just have some residual bad fuel. Look down inside the fuel tank and check for rust. If you see cloudy brown thats rust sediment thats most likely getting into your carb. Sounds like a debris clogged carb, very common issue.

[mynameistrey]

It does feel a little jerky when i try to cruise at a certain speed, around 25mph is where i feel it the most. Is that carburetor related? Theres also a hole drilled into the top of my air box, could that be the problem?

Did the bike sit unused for an extended period of time ? Is there fresh gas in the tank ? You might just have some residual bad fuel. Look down inside the fuel tank and check for rust. If you see cloudy brown thats rust sediment thats most likely getting into your carb. Sounds like a debris clogged carb, very common issue.

I also installed an inline fuel filter. That wouldn't stop that kind of debris?

[alantf]

Has it stopped enough to partially block it?

[Water Warrior 2]

If there is a hole drilled in the air box you better cover it over with duct tape soonest. The air flow is a reverse flow compared to almost everything else out there. You are getting unfiltered air into the engine. Pull out the air filter and you will understand. It gets dirty from the inside first because the air enters from the center and flows out through the filter material.

[jonathan180iq]

It does feel a little jerky when i try to cruise at a certain speed, around 25mph is where i feel it the most. Is that carburetor related? Theres also a hole drilled into the top of my air box, could that be the problem?

Not really a problem. It's just unfiltered air being pulled into the engine.....

How large is the hole?

Sounds like some previous owner tried to pull a Honda Civic intake mod on the GZ250 and made a mistake.

[mynameistrey]

It does feel a little jerky when i try to cruise at a certain speed, around 25mph is where i feel it the most. Is that carburetor related? Theres also a hole drilled into the top of my air box, could that be the problem?

Not really a problem. It's just unfiltered air being pulled into the engine.....

How large is the hole?

Sounds like some previous owner tried to pull a Honda Civic intake mod on the GZ250 and made a mistake.

Not that big. The width of a nail or screw. I think he was using it to spray carb cleaner through

[jonathan180iq]

.....that's really interesting.

Where is it located exactly?

[mynameistrey]

.....that's really interesting.

Where is it located exactly?

http://i1114.photobucket.com/albums/k522/youreaclone/IMG_2103.jpg?t=1340473806

[alantf]

Well, whatever it is, it shouldn't be there, so you might as well fill it. :)

[mynameistrey]

Hey so I'm back again and have a new problem. I finally got the bike running well, no smoke, no oil leaks while its on. I finally put my first seafoam free tank of gas in it and it's been cruising better at low speeds. My only problem now is when I go to shut it off, it lets off a big puff of white smoke from the engine. Sometimes it goes kind of ghost mode, I turn it off and it turns over 2 more times before cutting off. It looks as though maybe the carburetor might be loose? But it still backfires really loud on shut off. What might cause one big puff of smoke after shutoff?

[jonathan180iq]

That's called dieseling and it's caused by the engine being way too lean. The chamber is so hot that the excess explosive bits get heated enough to blow up again.

It's an issue that you really need to look into. If you have a carb that isn't fully sealed to the manifold, then that is most likely your problem. Too much air would be getting in causing the whole thing to run way too hot.

[mynameistrey]

So it was definitely the carburator. It was just loose. I straightened it back in there and it shuts off easily now. Thanks for the help.