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pago cruiser
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« on: November 10, 2014, 11:13:42 AM » |
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Have had the bike down for about 2 months getting stuff painted, sidecar sub-frames and hardware installed, aligned, electrical, etc. The only motor related stuff I have done is a radiator R and R, removal of shrouds, conversion to Standard grille cover, removal of IS radio controls, and a new (stock) exhaust. Oh, I also replaced the vacuum fuel valve with a new factory one.
Went to start last night, and had a devil of a time getting it going. Finally got it to keep running (using new hi-test gas), but it was ONLY firing on the left side. Other than carbs, is there anything common to the right side cylinders that would cause this?
It was late last night when I wrapped, so have not had anytime to break out an electrical diagram. Any thoughts on the most likely suspect(s)?
TIA.
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Just because you are not paranoid doesn't mean they're not out to get you
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Chrisj CMA
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« Reply #1 on: November 10, 2014, 11:27:41 AM » |
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Sometimes when one pours in just a little gas and turns the valve to "on" instead of reserve, it is like its running out of gas. That's all I can think of off hand.
Check the bowls on the right side, if you crack the drain screw and fuel comes out the drain tube at the rider peg area, then its probably getting gas and then I would think slow jets clogged........
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pago cruiser
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« Reply #2 on: November 10, 2014, 11:45:35 AM » |
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Thanks Chris.
I added 2 gallons, and was on reserve. So I don't think that's the case; but I don't know for sure.
I just checked partzilla, and the three right cylinders (1,3,5) are all fed from separate coils - so I don't think it's a coil failure; which is what I was hoping. Easy fix...
I don't get home till dark, and am currently stuck working on the Valk outside on our patio - hard to work in the dark... but I should be able to crack the drain screws and confirm fuel easy enough.
Oh, and I also replaced the starter solenoid - that thing is 15 years old. But I don't think any failure mode on a contact could result in a 1/3/5 failure to fire.
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Just because you are not paranoid doesn't mean they're not out to get you
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #3 on: November 10, 2014, 12:43:23 PM » |
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Yep, check for fuel draining on the right side carburetors. I too think you'll find you have a case of varnished low jets.
Just in case you may have hung floats, stand the bike almost straight up and tap the float chambers with a screwdriver handle. Then start it and see what happens. But, you still probably have a varnished jet problem.
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Rio Wil
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« Reply #4 on: November 10, 2014, 04:09:31 PM » |
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While replacing the petcock did you make any changes to the fuel hose that might result in starving the right cylinders. If you push the choke full on, do the right cylinders fire then?
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signart
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« Reply #5 on: November 10, 2014, 04:36:20 PM » |
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If it's not firing on the right side, it still won't run if you have gas in the carburetors. Pull and inspect plugs. Check to see if plugs fire.
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Attic Rat
Member
Posts: 446
VRCC # 1962
Tulsa, OK
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« Reply #6 on: November 10, 2014, 06:00:02 PM » |
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I have had the spark plugs fuel foul and they won't fire. Pull the plugs and ck them out and maybe move them to the other side and see if that makes any difference. You can also clean them with berrymans and a wire brush.
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The Attic Rat Performance Works
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pago cruiser
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« Reply #7 on: November 10, 2014, 08:00:46 PM » |
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Solved - I think. Got home at 7:30, had dinner and went to work... Opened all three right side carb drains - gas in each one. For some unknown reason, I decided to drain all the old gas. I was also wrong in my time frame said earlier - it's been fully 13 weeks sitting there with gas in the carbs. Then I checked the plugs. All three right side were...not clean, but still sparking. So I wiped them off with a rig, and scraped off some carbon with my pocket knife. Re-inserted plugs. Hit the starter. Nuttin. Scratched my head; then put the bike in neutral.  Hit the starter. Fired right up. Sure like the sound of those stock pipes.  I'm guessing that the gas went bad in the right side? Why not the left? BTSOM why. Think I'll treat her to some new plugs and a can of Seafoam; f'ing ethanol... Thanks to all. Yippee!! |
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Just because you are not paranoid doesn't mean they're not out to get you
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Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
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« Reply #8 on: November 11, 2014, 03:50:19 AM » |
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The new sparklers shouldn't be necessary. But, the Seafoam is a good idea. The low jets in these monsters are so small that they varnish pretty quickly if fuel isn't pulled through them on a regular basis.
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salty1
Member
Posts: 2359
"Flyka"
Spokane, WA or Tucson, AZ
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« Reply #9 on: November 11, 2014, 04:12:16 AM » |
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I would add the entire can of Seafoam to a tank of gas, better yet IMO use Berryman's Chemtool. FWIW
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My rides: 1998 GL1500C, 2000 GL 1500CF,2006 GL 1800 3A   |
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Firefighter
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« Reply #10 on: November 11, 2014, 04:27:32 PM » |
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I used to work on outboard (boat engines) years ago and gasoline was a major problem. It gets really hot in south Texas, and the fuel could sometimes go bad in a couple of weeks. Sometimes the gas would smell ok in the tank but gas in the fuel line and carb bowls would not let the engine start. We would open the fuel bowl drains and pump gas through until the old gas was replaced by newer gas, and the engines would start up and run fine. The old gas sometimes would not feel cold, but the newer gas would (feel like gasoline). If the boat was stored in the sun, this problem with the gasoline would be worse. Like I said this could happen in a week or two in some cases. I also had a Honda Rebel 250 that was my wife's, and it sat a lot (indoors), I would start this bike every week or so to keep the carb. clean. Then I had trouble, would not run right and I cleaned the carb., and it still run bad. Finally I realized the gas in the tank had gone bad, too old maybe, didn't even look like gas. Drained an refilled, flushed, and the bike ran like it was supposed to. Wow, I'm really wound up right? Any way I keep my tanks full and fresh. Hope this helps someone. Firefighter
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2000 Valkyrie Interstate, Black/Red
2006 Honda Sabre 1100
2013 Honda Spirit 750
2002 Honda Rebel 250
1978 Honda 750
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HayHauler
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« Reply #11 on: November 12, 2014, 02:20:41 PM » |
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Thanks Pago, gonna steal that one...  "BTSOM why." Glad you got it sorted out. Hay  Jimmyt |
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valkyriemc
Member
Posts: 392
2000 blu/slvr Interstate, 2018 Ultra Limited
NE Florida
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« Reply #12 on: November 12, 2014, 04:50:12 PM » |
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My right side was missing on two cylinders. No amount of Seafoam (which I Like) would cure it. Rebuilt the carbs,a big job but do-able. Runs great and now doesn't sit for more than a week without starting. Replaced both main and idle, stayed with stock. G/L
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Veteran USN '70-'76
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97Valk_CT_Euless
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« Reply #13 on: November 13, 2014, 08:13:27 AM » |
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Something occurred to me regarding your isse while disassembling another engine. The bowl vents on the valk are open to atmosphere on the stock setup. Just pointed straight down. On sitting bike, it would be real easy for a critter (like a mud-dauber) to plug one f the vent lines. Generally tey would run for a couple of minutes, but then quit. (At least that's what happened when totally misconnected mine, but that was both sides). Since the vents are separate, this could kill one side while the othe fires fine, You'd still have fuel in the bowls, but the engine vacuum couldn't pull the fuel in to burn it. I would think the fuel would pour out more slowly from that side when draining them though.
Just a thought.
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