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  1. #21
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    Quote Originally Posted by deathmetaldan View Post
    again, a very common problem. More than likely its a short in the harness around the neck area, fire it up with the tank off and jiggle around the harness a bit to see if the rear starts firing. If you feel like you can handle it, unwrap part of the harness and look for broken or split wires. They are usually pretty hard to spot since its just a thin slice, you have to keep in mind that your bike is 30 years old and the wires are in a spot that sees alot of movement.

    If doing that for awhile does nothing, make sure the fuel isnt just pooling up in your intake.

    I feel pretty certain that a super coil would fix all your woes.
    I'll take a look at the wiring harness and see if thats it. I don't think it is fuel pooling anywhere as I had the same problem when I had both carbs hooked up.

    Quote Originally Posted by wymple View Post
    Head over to

    http://viragotechforum.com/portal.php

    and then read....a lot

    Don't get too attached to that thing, it's like an addiction and they start multiplying. Those Hitachis, BTW, are just misunderstood. I've had several Viragos wearing Hitachis and not a problem. Usually it's the old story, someone left them sit & go to hell.
    I'm ok if my bikes multiply lol. The hitachi I have seems ok enough to me. Lack of removable pilot jet is kind of a drag but whatever.

  2. #22
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    wymple gets it, viragotech is a great resource and im not sure why more dont use it.

  3. #23
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    Quote Originally Posted by deathmetaldan View Post
    wymple gets it, viragotech is a great resource and im not sure why more dont use it.
    I'm on there as well. Sooooo much reading lol

  4. #24
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    Thanks for the responding everyone. I will update again in a week or so I think. I am going on vacation with the family to visit parents etc...as much as I want to throw the bike in the back of the truck I think it's best if I just leave it till I get back lol.
    Stay Tuned!

  5. #25
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    I'm back!
    ANd the bike still aint running right. But better.
    I switched the single carb manifold to sit so the carb is on the left side now thinking I could see if then the opposite cylinder ran cooler. Both cylinder seemed to warm up similar this time. I can now hear a change in idle when I pull the rear cylinder spark plug and can hear it firing but not every time as it should. The bike still dies when you pull the front spark plug but not instantly, it seems to coincide with the miss fires on the rear.
    I did pull the plugs after idle and rev for about 5 minutes straight and made a quick video to show everyone. Let me know if you see anything I am missing.
    I guess my next mission will be to start going through the wiring and looking for issues. If I can't find anything there maybe new TCI or coils etc??? I dunno. Anyone have a video of an 86 XV750 with single carb (gen2 stock Hitachi) and stock pipes running/idling I can listen too and compare??
    Here is the link to the video!
    https://youtu.be/tJrIIFaZMcY

    If all else fails I could skip the trouble shooting and get a real mechanic to do a once over and get it running right so I can just try and make a Virago look cool

  6. #26
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    Quick video update.
    https://youtu.be/8QTzKm-gMoA

    I said in the video I'd post picture of the spark plugs which I will later but they pretty much look the same as the last post.
    Also changed the oil and installed a new filter...

  7. #27
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    Nobody?

  8. #28
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    sounds like its run better than it ever has.

    As far as dying when the front plug wire is pulled and not the back. Im guessing it has something to do with the stock wiring and is intended to be that way.

    If its still dropping a cylinder every now and then try and keep notes of when it does it and what you are doing to see if you can find a pattern to it.

    Since you went from the stock buck horn bars to the drag bars you can shorten your throttle cable since its to long now anyway

  9. #29
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    Quote Originally Posted by deathmetaldan View Post
    sounds like its run better than it ever has.

    As far as dying when the front plug wire is pulled and not the back. Im guessing it has something to do with the stock wiring and is intended to be that way.

    If its still dropping a cylinder every now and then try and keep notes of when it does it and what you are doing to see if you can find a pattern to it.

    Since you went from the stock buck horn bars to the drag bars you can shorten your throttle cable since its to long now anyway
    Soooo . . . . don't worry too much about it and move forward? And I didn't switch the bars, the PO did. I am going to be going with some higher bars so I actually need a longer set of cables if anyone knows some that fit before I try and once again go beyond my comfort level and make my own lol.

  10. #30
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    thats what i would do, but i make alot of bad choices in life haha

    here is some throttle cables, motion pro can make anything you need
    http://www.jcwhitney.com/cables/yama...8571j1s21.jcwx

    If you are worried about making your own, think of it like this. Your carb has a return spring.... if you make a cable and it snaps or fails your carb shuts and the bike slows down.

  11. #31
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    Quote Originally Posted by deathmetaldan View Post
    thats what i would do, but i make alot of bad choices in life haha

    here is some throttle cables, motion pro can make anything you need
    http://www.jcwhitney.com/cables/yama...8571j1s21.jcwx

    If you are worried about making your own, think of it like this. Your carb has a return spring.... if you make a cable and it snaps or fails your carb shuts and the bike slows down.
    Well, looks like the little devil on my shoulder has a new name . . . and thats "deathmetaldan" lol
    I did slightly alter a stock Honda CB650 throttle cable I had to fit for now. Little lose at the handlebars but hey, its longer and works lol. Just removed the crash bars from the front to start working on new forward controls and to make room for the air filter on the single carb set up I have going. Might as well start moving forward and worry about the running issue as I go. Besides I am hopefully going to change over to Harley coils/Plug wires over the winter and maybe an M-Unit and new switches...so maybe the firing issue will resolve itself then LOL.

  12. #32
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    the power coil will for sure make the bike run better


    i only stopped mentioning it because i think most of my posts in this thread mentioned it. Have you tried switching the coils on the harness and seeing if the issue moves?

  13. #33
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    Quote Originally Posted by deathmetaldan View Post
    Have you tried switching the coils on the harness and seeing if the issue moves?

    Sorry not sure what you mean by "on the harness"

  14. #34
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    swap coils is all I could think. It's not like you can change which wires connect to which coil without swapping the coils, otherwise you wouldn't have proper timing.

  15. #35
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    Quote Originally Posted by Westboundbiker View Post
    swap coils is all I could think. It's not like you can change which wires connect to which coil without swapping the coils, otherwise you wouldn't have proper timing.
    this

  16. #36
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    A non 'running issue' update ….
    (For more pics check out my photobucket . . . http://s1370.photobucket.com/user/ju...?sort=6&page=3

    I had two old sets of bars laying around so I cut them up and re used the pieces to try and make my own pair of mini apes. They are just tack welded in the photo but the shape follows the shape of the tank so I think it looks cool.


    Also decided to remove the crash bars and fab some forward controls. This is a shot of the tabs I welded onto a bar to mount to same spot the crash bars were…


    This is what I originally came up with but didn't like how the shift linkage was above the bar or how wide they were…



    So decided to improve the design and re use parts from the original set up. Stole the threaded mounting tabs and original spacers and re designed the shifter linkage to sit below the bar. Also cut down the bar to 10.5" each side from centre.





    And in the end it came out look like this . . . . I do still need to figure out the brake side as the pedal is still in stock spot so its sort of a heel brake right now.


    I will have to extend some wires etc for the new bars I think So while I have that all apart I might relocate the ignition as well. Still have to remake the single carb manifold out of a more permanent material than pvc and then I want to upgrade to Accel Super Coils I think and maybe a new battery as well. Then on to some more chopping and painting etc….

  17. #37
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    Hey, so I kind of skimmed through the posts but I assume you still have the PVC manifold. I'm running a single carb manifold with a BST40 carb on my bike. I recommend building or buying a metal manifold. Main reason being the metal is going to insulate heat from the heads better. This helps keep your fuel atomized which is important since with a single carb manifold on these bikes one cylinder is further away from the carb. SeaRayGuy makes good manifolds that he posts on ebay with a ton of information in the description. Here's an auction for one. http://www.ebay.com/itm/virago-manif...2e29ce&vxp=mtr

    I have an 1100 virago but let me know if you have any questions on the bike. I also have a chopped wiring diagram I made that might help if you want to make one for the 700.

  18. #38
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    Oh yeah, I have nearly a full Virago 1100 completely parted out also. Let me know if you need anything. I'll check and see if I have extra throttle cables with me at college but they might be 100 miles away back home.

  19. #39
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    Quote Originally Posted by ScottArcher View Post
    Oh yeah, I have nearly a full Virago 1100 completely parted out also. Let me know if you need anything. I'll check and see if I have extra throttle cables with me at college but they might be 100 miles away back home.

    Thanks for reaching out man. I will let you know if I have any questions. As for the PVC manifold, I do still have it but as I mentioned its just a temp set up to get my ideas together, I will be fabricating a metal version here shortly

  20. #40
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    Jeebus, those look like some wide set controls. Maybe it's just the perspective in the pictures, but it looks like you'll be sitting with your legs wide open! Not to mention, if they're really far out there, they might drag in corners really easy.

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