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    79 Xs 400 2LO Wont fire

    Got it running, embarrassed to tell the problem. I made a rookie mistake. I took the carbs back off for a second cleaning and the emulsion tubes had fallen down, I forgot to put the little brass washers back under the pilot jet. I was also running it without the air filters. Haven't found them...
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    79 Xs 400 2LO Wont fire

    Got it running and reving with the 54 coils, still some issues, flooding badly, and a new issue, cylinder gets wet around the left plug, checked it out good don't really see a crack but im sure its there, must be very tiny, not sure if these are the correct carbs, I know they are XS 400 carbs...
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    79 Xs 400 2LO Wont fire

    After doing a little research and testing it appears that the 54 coils are 3.3 ohms and the 50 coils are 4.4 ohms which is apparently needed for a points bike. Interesting it will start with the 54 coils but won't rev, still working on that, and I could not even get it start with the 50 coils...
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    79 Xs 400 2LO Wont fire

    Does anyone know if CM11-54 coil work with a points bike, the one on it is a CM11-50.Thanks!
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    79 Xs 400 2LO Wont fire

    Busy working on the Bike finally got it cranked run beautifully dialed the carb in got the idle set right, just running off of bowl gas , good it will run , spent a day cleaning out the fuel tank fixing the petcock, put the tank back on, changed the oil, worked on the master cylinder which is a...
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    79 Xs 400 2LO Wont fire

    The left rubber carb mount is bad for sure, not as much suction on left as right, going to replace those and left spark plug was arcing to cylinder, noticed that last night don't see it in the daytime. Replacing them. This bike is a mess too long sitting. Thanks for the tip!
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    79 Xs 400 2LO Wont fire

    Thanks for the tip I will check the rubber mounts they look pretty weathered. Battery charger putting out 13.10 volts, still wouldn't start checked the time again and it had changed I don't know why im continually having to reset the time. Thanks everyone for helping me.
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    79 Xs 400 2LO Wont fire

    Just finished checking, the left fire was right on the mark with the timing light, couldn't get the inductive pickup to work on right side so I pulled the plug to check and it is firing, so I timed it again with the test light, it was off again, so I reset it with test light . These new points...
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    79 Xs 400 2LO Wont fire

    Trying to figure that out now hard to mash the start button hold the timing light and get down low enough to see the marks then my battery dies again, the battery im using is a brand new Die Hard lawn and garden battery, runs down quickly, starter either pulls a lot of juice or battery is not...
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    79 Xs 400 2LO Wont fire

    Found my timing light haven't used it in many years , you were right, timing not right according to light , that's what i have been thinking the whole time, but I have set it up using a test light numerous times by the book, im at a loss, I don't know whaat I did wrong. So how do you do it with...
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    79 Xs 400 2LO Wont fire

    I set the points up with a test light I will try the timing light and see what that tells me, Thanks!
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    79 Xs 400 2LO Wont fire

    Thanks for the reply! Haven't had it running long enough to use a timing light but they are statically timed. I had noticed not seeing any gas in the carb throat so thought I would investigate that shortly after I made the last post. I was just trying to get it to run on starting fluid to make...
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    79 Xs 400 2LO Wont fire

    Done some more checking checked time 2 more times, set exactly like book says. Had one coil stop sparking replaced it, was also getting hot. No difference, checked the compression again with throttle open left 145 right 155 . Still waiting on my iridium plugs but don't have much faith that's...
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    79 Xs 400 2LO Wont fire

    Thanks for the response. I have been busy got it firing but still won't run , it will roar occasionally with starting fluid but not every time, hooked the carbs back up after cleaning, and new floats, the originals had corrosion holes, tried to solder them and made things worse, and needle seat...
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    79 Xs 400 2LO Wont fire

    Thanks very much for all your help! I finally got it to roar, not for very long, I have to put the carbs back on, carb cleaning adventure will be another thread, but its always nice to hear the first sounds of life in 25 years. Took the points all apart to make sure the insulating washers were...
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    79 Xs 400 2LO Wont fire

    Update: Got the new points installed more trouble than the originals had to work on them out of the box to get contact, plus they didn't line up perfectly, still waiting on condenser, cleaned up battery ground, cleaned up grounds on coil ,no help, unhooked wires at points, have 9.6 volts, when I...
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    77 Xs Kick question

    Connects directly to gear on crankshaft here is a link to a service manual if you need it: https://www.dropbox.com/s/9np2w9fgzw98kh7/146396554-Yamaha-XS-400-H-SH-Service-Manual-ENG-XS360-2D-XS400-D-E-2E-F-2F-G-SG-Supplement-ENG-by-Mosue.pdf
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    Need help with kickstart

    I suspect to keeper that hold the crank gear in place on the shaft has come off and when you tilted the engine to get it off the frame it slid out of place. Need to take the right engine cover off to access it.
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    How to take an xs400r airbox out in under an hour

    I would be looking for a third option neither of the others sound appealing. There may not be one, but I like to keep things as close to factry as possible.
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    79 Xs 400 2LO Wont fire

    Bike has been sitting for a lot of years start button and stop switch were missing got the start button repaired put the 2 wires together from the stop switch, got the engine to turn over with the start button, plugs won't fire. What I have done so far : Set the points( not in great shape got...
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