Yea my buddys got an 05 YFZ, his glows red just warming it up, just lettin it idle for like 5-10 mins shell be cherry red about 4 or 5 inches down the head, the stealership out here said that its normal
its normal, but only for a certain length/color/load. they run super lean from the craptory. rejet it, and itll run a little cooler. still will glow, but only to how its suppose to. its perfectly normal. rejet, and enjoy!