Carb. Sync. Video

[Earl in Pensacola]

Some while back I watched a video on the "PROPER" way to rebuild and sync. our carbs..

I'm pretty sure it was on the VRCC site.  anyone remember it and still have the site address?
 
PM it to me if you can--Thanx,
 
Earl in Pensacola

justmeedp@cox.net

[Earl in Pensacola]

Carb. sync p-date-

Now I don't think the problem is the carbs.  I just did a compression test and all 6 hit 180 PSI--Warm W.O.T !! Can't beat that.  However, the left rear (nearest the alternator) plug was black!  The plugs are are new (2000 miles). With engine running, zero spark in that plug, so now I guess I;ll have to start "back-tracing".

[gordonv]

Remember you have 3 coils, each with 2 leads. If one coil is not firing, it should be affecting 2 plugs.

That is about the extent of my knowledge.

[PharmBoy]

Very, very rarely is there a new plug that is defective.  I once put a new plug in an outboard that would not fire. That was a head scratcher for a long time since I tuned outboards at a marine shop as a young man and had changed out numerous plugs over the years.  Wires do sometimes go bad. Also very rare.  I would suggest that you switch plugs and feel the exhaust to see which one is fireing...Jim

[Earl in Pensacola]

I have a club ride this AM, but will follow-up this afternoon.  One more thing I didn't mention: It runs great as soon as the throttle get to about 1/4 open !! ??  I will try to "follow-the-plug" first and see if the problem, at idle or just above, moves also.  If it doesn't then I guess it'll be check the wire. If still no spark, then the coil.  Out of the 6 plugs, only the one was black.
Thanx for the suggestions.

[Earl in Pensacola]

I just did a quick test and found that on the left side the lead plug and the last plug (by the alternator) were both not firing! With the engine running I simply pulled off one wire at a time, with no effect on those two cylinders. However, there is spark in the wire. I could hear it snap when placed close to a ground and yet again if I rev, the engine she fires on all 6. Must be that the carbs are not letting fuel into the cylinders at idle.  Remember these carbs were supposedly rebuilt be a dealership in South Florida.  Of course, that is the same dealership that didn't mount the correct size tire on the back, didn't balance either tire correctly, way over tightened the steering head bearings and incorrectly installed a K & N air filter.  So no telling what they did or didn't do to the carbs.

[Red Diamond]

Jets

[indybobm]

I would run a can of Berryman's B12 through it. Two tanks of gas, 1/2 can of Berryman's in each tank. Worth a shot, B12 does good things and is less than $4 a can at Walmart. Sounds like pilot jets are getting clogged.

[larswlvs]

the vacuum line me e sucking gas from the petcock

[longrider]

before you go too far check to make sure the petcock is holding vacuum.  Then make sure you have no leaks at all of the other intake runner ports.  A vacuum leak will lean the mixture out enough at idle to drop out the cylinder.   I found that out when I forgot to install a couple of intake runner caps on my new to me 2000 (8700 Mile) Valk this last spring

[Firefighter]

Odd that two different carbs would have the same symptoms. Has the bike set long, is the gas still gas or has it turned? Have you rode it enough to have fresh gas in the tank.  Does the gas smell bad and is it cold? Water in the gas, might drain the carbs and see what comes out. That black plug may be partial fouled. My wifes bike sat long enough that it would not run on the gas in the tank.

Those two cylinders are two separate coils.

Any way something could have  blocked the exhaust?  (Long shot)

Is the frame where the coils mount grounded well? Coil ground? Had that trouble once and engine would run high speed but not idle.  My two cents.

[DK]

"does the gas smell bad and is it cold??????

I don't understand the cold part. Please explain what you mean.

Dan

[Earl in Pensacola]

Lots of good idea and suggestions.  However, another something popped up Saturday during the club ride.  The engine "ran-out-of-gas" and came to a stop.  One of the ladies saw gas leaking out of the pet-rooster!!!  We pushed it to a gas station and filled her up.  finally restarted and in about 10 miles she died again, not out of gas but really leaking now.  Got hauled 27 miles home on a roll-back.  Removed the OEM pet-rooster and took it apart to install a rebuild kit.  The diaphragm had a inch long tear or "wear-thru" .  After the rebuild and tank reinstall I still had a leak.  Right now, I'm not sure if it was a lousy rebuild job or bad rebuild parts or the fact that I didn't completely empty the tank during the rebuild of the pet-rooster and reinstall on the bike. I have now completely emptied the tank and tomorrow I'll set the tank level between two saw horses, add some fuel and see if there is a leak.  If no leak, I'll put the tank back on the bike and see if a working pet-rooster has any effect on the mis-firing or no firing two plugs at idle.  My previous '97 Valk went 297K without a single pet-rooster problem.  This bike has only 53K and it's a '99.  I may just go ahead and install a manually operated Pingle.

[Firefighter]

DK as you know gasoline feels cold to the skin as it evaporates fast. When the gas goes bad it will loose that cold feel, and everyone has probably smelt bad gas, get that on you and you will smell it for awhile.
I used to do mechanic work on outboard motors, people would show up with engines that would not start, been sitting. Many times the gas in the built in tanks would be good but the gas in the fuel hose to the motor and in the carburetors would be bad. Many times I could drain the carbs. and use the primer to pump gas through the hose until all fresh gas and the engine would start and run good.

[The emperor has no clothes]

DK as you know gasoline feels cold to the skin as it evaporates fast. When the gas goes bad it will loose that cold feel, and everyone has probably smelt bad gas, get that on you and you will smell it for awhile.
I used to do mechanic work on outboard motors, people would show up with engines that would not start, been sitting. Many times the gas in the built in tanks would be good but the gas in the fuel hose to the motor and in the carburetors would be bad. Many times I could drain the carbs. and use the primer to pump gas through the hose until all fresh gas and the engine would start and run good.

Thats interesting. I didn't know that about it losing it evaporative power.