That range at that speed with those rpm's is not just acceptable, its actually pretty nice.
Stock engines with stock cooling and trannies run 375F at 60 mph when all is well with the mixture in that stock engine...
The nice thing is that the given temps don't rise much at all when speed and load increases. Big difference with a stock engine...
I know these differences very well, as I run CHT sensors on both the 1303 and my daily type 4 with stock engine/cooling.
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