Leaking choke plunger how to fix??

Hi please help.. i think i finally found the cause of my black sooty but dry plugs.. cyclinder 1 and 2 choke plungers... how do i fix? I tried 2000 grain sand paper to smoothen the edges of the plunger and of the seats.. but i think its not enough.. can i just plug the holes with rubber? I think 2 cyclinders with working enricher will do the job every cold starts? What do you master thinks??? Will there be a bad effect? Aside from slow heat-up in the morning??

Again thank you in advance this site is great infos lessen my chances of really f***ing up my bike.

 

Here is my problematic xj650 special..

 

Its more likely that tour choke it too tight, or the levers aren't synchronized, holding a few open. Otherwise )

 

Otherwise, it's the gaskets on the bottom of the plungers... You need new choke plungers.
It's not good to "force" two cylinders to warm up with no choke/enricher..

 

I did not know there was a gasket at the base of the plunger il definetly check this..

 

Temporary fix.. ugly but it works great

 

I used battery rubber caps.. seals perfect.

 

There is no gasket at the bottom on your carbs. Some of the 650 carbs did have them, but yours does not.
Your fix won't last long, and may end up causing you problems.

The best remedy is to use valve lapping compound on the ends of the plungers to polish up the fit between the plungers and the seats. You should also make sure that the springs are still springy enough to hold the plungers closed, and that the linkages are not holding the plungers open.

 

K-moe is correct. On a tapered seat plunger there is no gasket, only on flat bottom plungers.
His recommendation for a fix is good as well

 

Ok was think on trying this method last light...

Another quick question, can a lean condition really make a plug black and sooty but dry?? How can this be? Wer does the black came from if lean means lack of fuel to burn???

 

No. 1 plug

 

No. 2

 

Yes it can. The cause is incomplete combustion. If you have ever used an oil lamp you can think of it as having the wick set a bit too low or a bit too high. The result in either case is soot.
There is fuel enough there to burn, it's just not in the correct proportion to burn cleanly.

 

Copy that! Tnxs sir!

 

Why are my plugs carbon-fouled (dry, sooty black deposits)?:

- Carbon fouling is the result of incomplete combustion----for any reason. It is most often associated with an overly rich fuel mixture (whatever the cause), but can also be caused by an overly lean fuel mixture (or poor spark, etc.) In a lean-mixture condition, most of the un-burnt mixture gets pumped out the tailpipe, but some fuel droplets remain in the cylinder and add themselves to the next intake charge. That's not a very precise way of metering the mixture, so when it's finally rich enough for a spark to ignite, that particular charge may be too rich, resulting in incomplete combustion and plug fouling. So carbon-fouled plugs can be due to rich or lean conditions.......your Colortune spark plug will tell you for sure. If you have a light blue or white-ish flame, intermittent flame, and/or intermittent flashes of yellow within an otherwise white-ish flame, then your fuel mixture is too lean.

And by the way.........if the spark that happens to ignite this overly-rich mixture is the "wasted spark" (which occurs in each cylinder at the top of the exhaust stroke, it will occur JUST AS THE INTAKE VALVE IS OPENING ---- so the backfire pressure wave may be directed back up the intake tract!

 

Fixed my leaking choke plunger... with the suggestion of K-moe a little valve lapping compound... (green) be warned my fingers hurt so much after 4 plungers.. can't eat can't even open zipper to use the toilet

I could not risk using a dremel to make job easier.. the brass was to soft anyway. One wrong move on the dremel and bye bye plunger..