XJRider.com

So yesterday day I was riding to work and when I took off from a stop sign I felt a power loss in the top of first. I sifted to second and it sounded like it was running on 3 cylinders. I limped to work and went to pull the spark plugs and found the insulation on the #2 spark plug was cracked. So I figured that was the problem and went to leave after work and I had no power at all. It would run but if I got it going it would slow down till the engine died. I trucked it home and changed the plugs but it still runs the same. I cleaned the carbs and still #2 won't fire. So I pulled the valve cover and the timing chain looked a bit loose, I put a wrench on the tensioner and it was tight. So I pulled the tensioner assembly off and I knowtest the shaft was fully extended. My question is is that a sign the timing chain is streched beyond its limits? Could the chain hop a tooth and cause only one cylinder to stop working? Wouldn't all the cylinders be affected equally. And why would I have enough power to get on the interstate on the way to work with 3 cylinders but on the way home I only made it 2 miles at 10 MPH. I only had a hour to wrench on it this AM. I still need to do some more diagnosing but that chain didn't feel right. The jets on #2 carb are clear, diaphragm is good, floats are good, slide isn't sticking. Also the oil pressure light came on at idle about a week ago, the level was good. The engine hasn't been run for about 6 years so I changed it when I first got the bike and put about 2,000 miles when the light started coming on. I figured there was just a bunch of gunk in the engine from sitting clogged the filter so I changed it (oil and filter) again but the light would still come on at idle sometimes. Any help would be greatly appreciated!

To do list

Check out the coils wires and plug boots

Test for a good spark

Clean the carbs spotless again

Do valve clearance checks