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    Gas leaking from air filter

    Thanks for the insight. I'll start at the petcock. Just want to mention that when we first got the 1980 xs we rebuilt the petcock, approximately 3 years ago. There was a period after the petcock rebuild that the bike sat for 6 months. Is it common for the petcock to go bad within years...
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    Gas leaking from air filter

    My son has a 1980 xs 400. He drove it to work today and ran it out of gas. While at work the left choke was left open. Late in the evening we fill the take and notices gas pouring out of the left air filter. Question: is this due to the choke being left open or possibly a float issue? Or...
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    Carburetor jet

    Thank you. Placed my order with Jetsrus.com
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    Carburetor jet

    Gra900. I can't determine if the last owner messed with carb. and replaced one of the jets with one that has bleed holes (or does not have bleed holes)?? Or has it never been messed with and it came from the factory with the duel carb. having one of the two jets with bleeder holes?? One...
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    Carburetor jet

    Thank you for the reply. Question: Only one has the bleed hole, does it matter what side of the dual carb it goes back into??
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    Carburetor jet

    I'm currently cleaning and replacing worn out parts in my 1982 Yamaha 400 SJ carburetor. I recently noticed two of the same jets were different.....one had multiple holes and the other had none (see attached photo). I'm not sure if it makes a difference when I come to placing the jet in either...
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    Carburetor Float

    Xschris.......I sent the money via PayPal. $25.00.
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    Carburetor Float

    XSCHRIS. Sorry for all the back and forth. I'd like to make the purchase for both the floats. I'll keep the one I have just in case I need it down the road.
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    Carburetor Float

    What is your asking price. Are they sold as a set or could I purchase only one.
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    Carburetor Float

    I recently decided to take apart and rebuild my 1981 XS400 carb. After removing the float bowl and floats, I notice one of the brass floats had several pin hole. So I decided to bust out the solder gun and do some repair on my own. I bautched the solder job and will have to buy a new float...
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    Carburetor Rebuild

    Sorry for asking many questions. I removed the jet above the emulsion tube. From what I've seen the emulsion tube should slide out toward the top of the carb. The tubes are not moving, and afraid to apply pressure. Are they critical to remove and clean?
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    Carburetor Rebuild

    Xschris, Obviously you know carburetor, what is the best rebuild kit for the 1980 xs400? Any advise for cleaning would also be appreciated.
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    Carburetor Rebuild

    Thank you guys for the reply. I used both suggestions to get the pins far enough out so I could get a needle nose vise grip in conjunctions with light hammering to dislodge the pin. Unfortunately I bend the pin and will end up making a small purchase.
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    Carburetor Rebuild

    I recently started rebuilding a carburetor for my 1980 xs400 and I'm having trouble getting the rod removed that hold the float in place. Any suggestion for a technique for removal??
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    Starting, starting

    spectra.......good information to know about the K&L kit. I've no not issues with the K&L at all. I'm am going to re-condition another bike over the winter, so I'll look into the Mikuni Carb Kit. Happy wrenching @seanneyb. Please keep us updated on your progress.
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    Starting, starting

    Seanneyb, --As for the vacumm, yes just make sure it is connected from the backside of the petcock to the carburetor joint (black rubber transition piece between engine and carburetor). --As for the timing I would take the recommendations from NewHavenMike and Stormtracker, they seem to be very...
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    Starting, starting

    seanneyb.......I had a similar problem when it came to gas leaking out the air intake. After a month of working on my project bike (1980 XS400) and replacing the CDI, rectifier, voltage regulator, rebuilding the carburetor and the petcock along with replacing a handful of parts, I final got the...
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    Clutch Adjustment

    xschris.......I'll have to admit, it didn't cross my mind until my son started complaining about the pain in his wrist from the difficulty of shifting. I wasn't aware of the cable lube tool until you mentioned and then viewed it on youtube. $12.00 seems like a reasonable investment to keep up...
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    1980 G ignition coil locations

    Please keep me updated with your outcome regarging the harness and how it is viewed from the schematic. Always very interested in discoveries.
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