Originally Posted By Q8morgan
The blueing is comes on the pipes because the engine is running lean i guess

No it is not the lean mixture. It is quite natural for stainless steel to develop a bronzey blue colour when it gets almost red hot. The only way to avoid this is to have double walled header pipes, that is to say one pipe inside another. This has been done on some expensive touring bikes but is costly and adds to the weight.

Some people quite like the colour that develops and get a bit upset if it is not even. It is important not to touch the pipes with your hands after you have polished them. In some cases the action of the heat and the finger or hand prints can cause them to colour first and stand out on the pipes.


Peter

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