Posted on Thursday, September 20, 2012 - 11:40 pm:

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The insulation added to the 2009 and later 1125 frames is quite effective,and dropped the stabilized frame temperature roughly 10 degrees in testing at Harley's Arizona proving grounds. It is 2mm Pyrogel 2250 from Aspen Aerogels, and it is the most effective insulation you can buy. The Pyrogel is packaged in the shiny material to preserve it and allow it to be bonded to the frame. The insulation was placed at just the highest areas of heat transfer into the frame (i.e. near the hottest hot spots on the engine) for efficiency. However, for race bikes, we covered the entire inside of the frame with the same insulation, and while we never made objective tests of this, it undoubtedly kept the frame and fuel cooler yet.

The other thing that racing showed was that an insulated rear header also reduced heat into the frame, though this was never quantified and wasn't required when the racing radiator air-paths changed so as to not duct hot air from the radiators between frame and engine. The reversed flow path on the DSB bikes using Canadian bodywork, and the ducted path on the 1125RR substantially dropped frame temperatures to the point where fuel evaporation was not an issue even with some quite volatile racing fuels that had histories of boiling, in, say, CBR600RR fuel tanks. ; )

As for the fuel smell and fuel dripping, the single simplest thing that can be done with an existing bike is to install the carbon cansister. There have never been complaints of either from California 1125R or CR riders.

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Posted on Friday, September 21, 2012 - 12:16 pm:

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When I did mine I used something different. Not entirely sold on it yet so I won't be sharing what but I can tell you this I used far more than 56” with a 5” width. I did the entire inside of the frame though.

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