Spark Plug Help

[shack]

Hi all, well I got my old girls fired up after many hours of carb stripping and cleaning, I cleaned and set the gap on all my plugs and after a dose of rough running I inspected the plugs, cleaned and ran the bike for another 10 minutes, the condition of the plugs remains/ returned to the same.

2 black and 2 'wet'

so, my question is what is the best way forward?

As I sit on the side the two on the left are the wetter ones and the ones on the right are the dryer/ black ones.

It's a 1986 Yamaha XJ750 btw

[jasonbc]

Don't know how long you ran it for but if it was left on the side stand for a while the lefthand plugs could be getting wetter if it burns oil

[shack]

It was on the side a little, but then I sat on it as I tried to get it to tick over withput constant throttle tweaking, total run time prob 20 minutes. I did have a float valve issue on the left side but hoped to have fixed that (fuel at one point was not shutting off in that cylinder) haynes was talking about timing and poor mixturesbut not may area of expertise.

[thetimkirby]

2 black and 2 'wet'

2 black: as in dry and sooty, or oily?

2 wet: as in oily wet or petrol wet? Are they the right colour under the wet?

Sounds more like mixture than timing. Did you put new parts in the carbs, or re-use the old ones?

[shack]

Fuelly wetness and dry carbon blackness.
Clean up fine, but return to that state after 10min tickover. No new parts used in carb blast! Thanks

[hotbulb]

A short run unloaded won't give a good indication.... you'd do better after a good run of 10-15 miles, to get the machine thoroughly warmed through. But for my two penn'orth - are the chokes on all carbs returning fully to "off"?

[Mervinh]

as hotbulb says a good run/ thrash first, It will get the bike to full temprature and burn off any excess fuel or oil that maybe in the bores

[shack]

thanks guys, a run might be a problem as this is my project bike and is sorned, nit to mention not recovered fully from its 12 year rest up. Checking pilot settibgs has been suggested so wikl give that a poke as well, had em out for a xlean so will check they went back as they should have.