Hi. I looked in the forum for this, and i found that G54V gives some problems with stalling. I have a F4 1000s. Days ago my bike was misfiring and was a spark. I changed CR9eix for G54V (i had a set at home). Bike runs ok, but cold start its very longer (here we have now around 7C in the morning). Next start ups are fast an normal, but first in the morning only possible in 3/4 attempts with full choke handle. Its normal with this surface gap sparks? Thanks to all.