Hello Everyone I am getting ready to complete my first maintenance schedule on my 426. I have about 3 hours of ride time on the bike and plan to change my plug, tighten my chain, drain my radiator and change the oil. I asked the parts manager at the dealership which plug to use and he sold me an NGK. Do you guys use an NGK in your bike, or is there something better out there? Also I have read where a lot of you are using Mobil 1 10W50 instead of YamaLube. Is this the best oil to use? I would also like to drain the radiator. What type of coolant/antifreeze should I use? I just completed the BK Mod to my bike. I got to ride it for about 15 minutes after the Mod. It ran great but would sputter a little on decal. Now it will not start at all. I’m thinking the plug is fouled due to all the testing during the BK Mod, and the weather has went from a little chilly to butt a$$ cold. As always, thanks for all the help to the greenest rider here.