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R1200RS + R1250RS Forum � 1200 RS technology � General topics � Left/Right header temperatures

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#1 | Left/Right header temperatures datum

Sat May 22, 2021 7:54 pm

Recently reading a thread elsewhere that stated the right cylinder head runs hotter than the left one on the R1200RS [ wethead ].

Anyone have a definitive on this? Reason why one gets hotter than the other?

The mind is the limiting factor

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#2 | RE: Left/Right header temperatures datum

Sat May 22, 2021 8:05 pm (Last edited: Sat May 22, 2021 8:06 pm)

How much hotter? Are guys out there pointing temperature readers at their boxer motors? This doesn't do much to help the image of BMW riders.

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#3 | RE: Left/Right header temperatures datum

Sat May 22, 2021 8:11 pm

Zitat von TriangleRider im Beitrag #2
How much hotter? Are guys out there pointing temperature readers at their boxer motors? This doesn't do much to help the image of BMW riders.

Someone asked another because one header pipe was gold, the other blue. Then the discussion went to one running hotter than the other. Thought I'd ask the learned members here if they have information on this.

The mind is the limiting factor

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#4 | RE: Left/Right header temperatures datum

Sat May 22, 2021 9:17 pm

Naturally the pistons are offset and consequently there is a difference in exhaust geometry which causes a heat difference and consequently a difference in heat discolouration on the exhausts. Given that these are wet heads I doubt there is any temperature difference at the rockers.

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#5 | RE: Left/Right header temperatures datum

Sat May 22, 2021 9:33 pm

Zitat von Boxerboy im Beitrag #4
Naturally the pistons are offset and consequently there is a difference in exhaust geometry which causes a heat difference and consequently a difference in heat discolouration on the exhausts. Given that these are wet heads I doubt there is any temperature difference at the rockers.

Are the headers equal length? If so, I'm not convinced there would be a heat difference. That said, one side on mine is blue and the other isn't.

2020 R1250RS

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