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282 Posts
Don't forget, (IIRC,) the M620's were air-cooled, with the added benefit of no oil cooler. If it becomes a problem DP offers a retro-fit cooler kit in their catalog. My '00 M900Sie doesn't have an actual numerical temp gauge & the RoadRacing unit I added is bereft of any numbers. I've never hit it with an IR thermometer to test it. I just go on middle of gauge = ok, top of gauge = not ok.
