no fire in #6 part 2

[playmecd]

Posted a few days ago. about #6 not firing- a couple folks suggested something about a vacuum line to that cyl., also something about a jet plugged. I found I am getting lots of raw gas in the  cyl, so I suspect you are correct. The question is, what do I have to do to repair this? How much of the bike do I have to dissassembl to get to the carbs? Don't get me wrong, I love my valk, but I find it complicated to work on, lots of stuff to remove to get to problem. Where do I start?

[Bone]

Get a manual first.

[sandy]

If #6 is wet, find the source first. Pull the vacuum line and dry it up. Wait to see if fuel comes down the vacuum line. If not, it's a stuck float valve in the carb. Your petcock might need the "Cover Set" kit to replace the vacuum components of the petcock.

[hubcapsc]

We fixed my buddies whose bike had the same symptoms as yours
with a "cover set", you can get it online or at your local honda shop...
a cover set is a rebuild kit for your petcock...

 16953-MBZ-B51 is the cover set part number

  16952-MZ0-003 is the part number for the internal screen in the tank, it
                               wouldn't hurt to replace that while you're in there.

Search "cover set" on the tech board and be prepared to read for
a while, all the info you need will be there.

An alternative is to replace the OEM petcock with an aftermarket one...

Fixing the petcock will almost certainly fix your problem...

-Mike

[Patrick]

Yep, as said, I doubt you're having a fire/ignition problem. The problem is probably a defective petcock. Rebuilding the petcock is in order, or, replacing it with a Pingle and just plug #6 nipple.

[custom1]

If you are getting fuel down the vacuum line from the petcock to #6 you will also have fuel dripping from the vent hole in the bottom of the petcock, unless someone has plugged that hole for some reason. You can probably see the bottom of the petcock easier from the right(ignition key) side of the bike.
 In my opinion, I don't think fuel will run freely down the vacuum line without the bike running, because the vent/drain hole is between two diaphragms in the petcock. Maybe if both diaphrams are bad and the bike is running it will get sucked down. So check the vacuum line to see if it is wet right after you have it running. If the bottom of the petccock is dry and not plugged off by someone, I doubt that there is any fuel getting to #6 that way.

If that vacuum line is dry, the only other way to get raw fuel in that cylinder is if the float needle is stuck open. Tap on that float bowl lightly with something to try and free it.

No mattter how the fuel is getting in there, be very careful when trying to start it. If there is too much fuel in the cylinder it can hydro-lock and cause much damage.

No disassembly needed to try these things.

[hubcapsc]

If you are getting fuel down the vacuum line from the petcock to #6 you will also have fuel dripping from the vent hole in the bottom of the petcock, unless someone has plugged that hole for some reason.

The PO of my buddy Gary's bike had all the bases covered...  



You could just feel the petcock, it was always wet. That Gary didn't hydrolock or
catch on fire is a blessing. Plus the raw gas coming out of the muffler made a
dead spot in the lawn.

-Mike

[custom1]

Playmecd, 

Just for your info. That picture that Mike posted is an example of what NOT to do. That is the center section of the petcock. That yellow nipple is not suppose to be there. If there is fuel coming out of the center section of the pecock, it means it needs rebuilt with a cover set or replaced.