Timing Pickup Question

[randy]

My gut feeling it that it is too rich. What else could cause it to run too rich. I say too rich because the plugs are black .. right

Sooooo,

The plugs are fouled! Why didn't I think of that?

Fouled plugs will fire just fine out of the cylinder, but put them under pressure ( compression ) and they'll misfire.


Dammit, man, put new plugs in!

[79XS11F]

These are 4 brand new plugs with about 5 minutes use on them?
Rob

[79XS11F]

Originally posted by TopCatGr58
Hey Rob,

The photo of the spark was a bit difficult to tell, was a bit out of focus and pixellated. I was surprised that you were actually able to get a shot of it, must have taken you several attempts to get your "timing" right to be able to catch it!

Putting the old jets back in is a good idea, especially the pilot jets. I'm hoping you'll be pleasantly surprised when you put them back in! Many others who had bad fouling plugs experienced the same improvement once they went back with the OEM or Genuine Mikuni jets!

Then, once you've got it running right, and are not fouling or carboning up plugs, then you can probably reinstall your Dial-a-jet system, since it is supposed to work on upper throttle levels, not during idle!
T.C.

Ya it's real hard to hold the cam study enough for a clear PIC with the flash turned off but the plugs do in deed have up to 3 sparks coming off them. So YES I will clean and re-jet with the jets that were in the carbs when I got the bike and see what happens.
Where can I get Genuine Mikuni jets???

I will also take a moment here to say
THANKS EVERY ONE FOR FOLLOWING THIS ISSUE WITH ME!!!

I have thrown too much cash at this bike now to not get it going and going RIGHT
Rob

[TopCatGr58]

Genuine Mikuni

Bike Bandit used to carry the large head ones, but I can't find them now. I can still find the BS30/96 Pilot jets.

The problem with MikesXS is that they jump from 115 to 120, don't offer the 117.5 or the 122.5 size!

Main Jet - Large Round Type
#120 Main Jet - Large Round Type - N100/604 Mikuni type - Fits:1980-84 Stock
XS650 Mikuni 34mm. CV carbs and aftermarket Mikuni TM 36-68 Flatslide carbs.
Sold in 2's.


Part #48-0113 $6.00 USD /Pk./2
****************
Pilot Jet - BS30/96 Type
#45 Pilot Jet - BS30/96 Type - Fits: XS1/XS1b/XS2/TX650/TX650A (1970-75)
BS 38 Mikuni CV carbs, XS650G/SG/H/SH/SJ/SK/SL (1980-84) BS34 Mikuni
CV carbs. Sold in 2's


Part #48-0607 $6.00 USD /Pk./2

T.C.

[pggg]

"I'll check it tomorrow morning. Question.. How would that affect the signal is that not just a bushing? I mean if the thing is rotating properly what difference would that make?"


There was something wobbling off centre in there and spark seemed on one side and reading plugs were no help for that one, whether 1 & 3 or 3 & 2 or 4 & 1 or whatever .. I still can't figure it

[79XS11F]

Re: Genuine Mikuni

Originally posted by TopCatGr58
Bike Bandit used to carry the large head ones, but I can't find them now. I can still find the BS30/96 Pilot jets.

The problem with MikesXS is that they jump from 115 to 120, don't offer the 117.5 or the 122.5 size!



T.C.

Why those sizes of mains? My current main is 142.5 ???

Rob

[79XS11F]

Daaaaaa Sorry that's pilots at 42.5 can't find where i wrote down main jet size. I will know tomorrow when I change them out for what came in the bike.
Rob

[79XS11F]

Originally posted by pggg
"I'll check it tomorrow morning. Question.. How would that affect the signal is that not just a bushing? I mean if the thing is rotating properly what difference would that make?"


There was something wobbling off centre in there and spark seemed on one side and reading plugs were no help for that one, whether 1 & 3 or 3 & 2 or 4 & 1 or whatever .. I still can't figure it

Every bit helps pggg ... I will check it tomorrow
Thanks eh
Rob

[LoserShoes]

Re: Re: Recap what's been done fuel wise!

Originally posted by 79XS11F



i can start it and it will run on chock but not without. I t still misses and is very rough running.

Rob

That would indicate lack of fuel flow through the carb. Did you remove and clean the atomizer tubes that the mains screw into? Those little holes have gotta be clean. And just soaking doesn't usually do it.

Steve

[Nate Dogg]

So what the frick happened...I read the whole post...did this poor guy get his bike running or not?? Gees...almost think best to cut losses and buy a newer bike...thanks for all the tomatos...

[Bamper]

I had this exact same problem on my bike and i was dead certain it was electrical. When it is running if you put your hand over the number 3 or 4 it would fire, let go it and it would burn all the gas in the carb and start misfiring. I did have an airbox on it and I think that was why. Set of pods is on the way.

[79XS11F]

Originally posted by Nate Dogg
So what the frick happened...I read the whole post...did this poor guy get his bike running or not?? Gees...almost think best to cut losses and buy a newer bike...thanks for all the tomatos...

The problem proved to be carb related. The vent tube in the air box were plugged so I had a flooding situation.
Yes i got the bike running ...
Rob