Carb question gone to spark plug guru pics

[the_finch]

Well new plugs, still not running on all 4, removed the carbs and clean them again. not sure what next. Any idea yamaha george. Some thing simple, some thing I have over looked. Maybe it is the carbs and I just don't see it.

I had sort of the same thing happen to me when I first got my bike. With mine, it was the carbs, but it was a little odd. Here we go.
The bike had sat for too long when the previous owner sold it to me, and he hadn't drained the carbs, so varnish built up in the fuel bowls. After my second tank of premium (93 octane), the bike started to sputter a little, so I did what I thought would help. I put in Lucas Octane booster and Fuel system Cleaner. Big mistake.
The cleaner (and I used WAY too much) knocked the varnish out of the fuel bowls, cleaning them up. The only problem was it came out in chunks, and chunks of this old varnish got jammed inside the emulsion tube against the fuel needle, cutting all fuel from the main jet (I think I have that right). I shortly went from running on 3 cylinders to being unable to start due to only 1 firing, and I had brand new plugs in the bike.

So double check and re-clean your emulsion tubes if you haven't done so yet. And whatever you do, don't take it to the dealership like I did. They robbed me blind AND the guy they had "rebuild" (cleaned with a spray can) my carbs managed to up my emulsion tubes pretty well, and I have to replace them now. Just do it yourself.

There's my , hope it helps.

[ALMOST]

All the exhaust pipes seem hot, But number 1 is a little lower in temp. The bike was running fine I let is sit for two months, but every two weeks I would start her. I think I might dip the carbs. Some one on the forum did it with the stuff from auto zone. I will check the compression. I read on the wiki about the valve sim and adjustment. Maybe I will check the valves.

[yamaha_george]

Well new plugs, still not running on all 4, removed the carbs and clean them again. not sure what next. Any idea yamaha george. Some thing simple, some thing I have over looked. Maybe it is the carbs and I just don't see it.

A,
Ride the bike some 10 miles or so, then pull the plugs.
that should show what cylinder (confirm No.1 is the culprit) is not well.

You may find that if it is crap in the carb then it will blow through a little seafoam in the tank would not go amiss.
If it still stutters and we know which one then we can clean just that carb OR check the electrics to that cylinder.

[ALMOST]