Stock Cylinders

[pekingduck]

Nikasil is a proprietary process that is considered a surface plating.  The process Honda uses is a deeply impregnated hardness process that allows for a single 0.25 mm overbore.  It may be their own process, as it has been used in their bikes and cars for many years.

There is no iron liner as on older air-cooled models, heat absorption/dissipation is crucial, and iron is a poorer conductor, and there is less complete contact between cylinder and liner.

Thanks pekingduck. Does Honda use the Fiber Reinforced Metal process on the CB1100 cylinders, or the thermal spray coating (Nikasil by trade name)?

It's not Nikasil, which is not borable - it's impregnated deep into the aluminum deep enough to bore it 0.25mm.  It's not a spray coating.