Long story but I'll try to keep it short. Bike has been running great all year until yesterday. Got home from work after daily 35 mile commute parked bike for a few minutes then went back out but bike was running like crap, almost like it was starving for fuel but still had half a tank. Went back home and let bike cool down completely. Started it back up and checked pipes. 2&3 felt like they weren't warming up as fast as 1&4. Pulled seat and tank to check plugs. Plugs looked ok, they are iridiums that I put in last spring, about 6k miles ago. Checked spark and it was barely visible on all four. My first thought was coils or ignition. Luckily I still had the old stock type plugs from last year. Cleaned them up put them on to check spark and spark was huge. Put them in, put bike together and took it for a test ride. No problems. Started back up good when hot.
This morning bike started a little hard but that's why I had replaced those old plugs to begin with last year. Once started it ran great all the way to work.
Any thought? Can iridiums just die like that. The day before the failed plugs, the temp here was near 100 and I rode the bike (again 35 miles each way) but it seemed to handle it ok.