Measuring from the base of the spark plug: What should be the optimum and maximum cylinder head temperatures?
It's noteworthy that the stock temp sensor reading and the reading you get at the plug are WILDLY different. It might say 235 at the stock temp sensor location and 355 at the other AT THE SAME TIME.As others have posted. In my area summer time temps can be anywhere between 80-100.. on normal days anywhere around 70-85ish I usually see my koso digital cluster go up to around 180-200deg on normal back road riding. If i'm really romping on it and get stopped at a few lights i'll normally see around 206-215ish... Different riding styles will make it vary. On the hot hot days and stuck in traffic it'll come up to 220-230, and I usually will pull off someplace once I hit 230 and let the bike cool off some, or find a side road to take a nice stroll and let temps come dow. (rarely happens that I have to shut it off, but I like to er- on the side of caution). I also use the stock temp sensor and the koso digital speedo cluster w/ temp monitoring. To note: I have koso 170 bbk 4v head.