Ok,
Here is my list
"04" stock motor
stock carbs 270 mains,25's pilots,1 1/2 turns out on the air screws.
tusk inline fuel filter
tr6's
tors removed for motion pro twist install
Pro design filter with 12 vents in the box.
Yamalube 2r at 36:1
ngk br8es
The thing has run great for over 2 1/2 years since I've had it and yesterday it started missing and running on one cylinder at times.So I put a new set of plugs in it and still the same thing.The old plugs still looked real good and clean.{determined that it was the left cylinder}
I thought maybe I had a reed problem so I pulled the carb and the reed cage and inspected.
Nothing wrong that I could visibly see and the reeds did not seem to be broke or damaged!
Put it back together and started it up.It ildled fine.Took it out and rode it and after it was warmed up it would not fire until I got half way into the throttle and then it would hit and pull like normal.
So I switched the plug wires,left to right and right to left,same thing as before!
So I then left the rightside plug wire on the left cylinder and tried to start it,but no go.
I then put the left plug wire on the rightside plug and it fired and ran on the right cylinder only.
I decided to pull the left carb and tear it down and clean all the passageways and everything looked good.I used carb cleaner and compress air.I also took off all the plastic and tank so that I could check all of the wiring harnesses and connectors and did not find any problems at all.
I have not run yet since I checked the carb as it was to late tonight without pissing off the wife and neighbors.The way it acts to me it's electrical and not a fuel delivery problem but I'm stumped!
Could it possibly be the coil starting to go bad.
Sorry for the long post ,but I wanted to give as much detail as possible.