Mine was done on a fairly cold day and I probably have the most narrow power band on the planet. Still lotsa fun to ride, but I'll be sporting either a 315 or 331 with mild cams next season; much more usable power with the addeddisplacement.I'll probably opt for the 331 because the 315 has a 11.9:1 compression ratio which would limit me to burning premium fuel, which is kinda pricey where I live.