I was out washing my F2 the other day when I noticed that the top of the#1 plug wire was not seated down on the engine properly. When I went to wiggle it to reseat it the whole thing just pulled right out!!!! I had just had it out for a ride the day before and hadn't noticed a thing wrong.

My question is this: Does anyone else have a problem with plug wires vibrating off? Also, do you think there's enough juice going through the wire to be able to arc and fire with the boot just laying in there loose? This has me mystified. How did I not notice it running on only 3 cylinders...

 

well if your plugs are in good shape will still running even if the cap is not all the way on, i check my plugs in that way i can see the arch from the plug an bike run in al 4 cylinders, and i have a kx250 and the wire broke off rigth on the cap i just stuf the wire in there again and work fine for the last 2 year

 

Thanks alejandro, that explains why I didn't notice it was off. If I could only figure out why it comes off....

 

those caps come off often by vibration nothing special your bike is fine