On my 08' CRF250R, I recently had to replace a head gasket & water pump seal because water had gotten into the engine. I flushed all the water out & put a new head gasket. Which means I had to re-time the cam. It started on the first few kick. But starting then dying without me giving it a little throttle. After about 30 seconds of me giving it throttle, it started to run on its own. I was walking around the bike checking everything out, & notice my header pipe was bright cherry red (much brighter than in the picture). I instantly turned off the bike & did some research. I noticed that it is normal for this to happen. But most cases it stated that it could be seen at night. Where I was in mid day & it was cherry red. The engine seemed to be getting hotter than usual as well, I have all the oil & coolant in. Don't know what could be the problem. I really want to ride but I'm not sure if it's safe. Help please?