Originally Posted by Razathorn

Depending on conditions, 200 - 270. Obviously 270 on a cool dry day is probably a sign of a pretty lean tune, where as 200 on a 100F+ day is probably a little rich. Temperature will vary greatly with oil content, track layout, it's so hard to say. My motor, when tuned well for race conditions on an average summer day in the midwest, tends to be around 220 - 240. On the hotter days, it will approach 260 - 270, and when I see it get close to those temps, I tend to richen the motor up and take away a little top end to be on the safe side, especially for club races. At a bigger event, I may still tune tight to top speed and leave it on the hot side.


Wayne