Honda-SOHC
SOHC.co.uk Forums => CB350/400 => Topic started by: AshimotoK0 on March 20, 2026, 08:37:53 PM
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I went to my mate Paul's today (who rebuilds and sells 400/4 carbs)
I took this IR image of his 400 header pipes after starting Paul's bike and then ticking over for a few minute using my FLIR/ iPad combination. I bought this setup to look for hot-spots on some electronics I am designing for work ... but useful for bikes too.
[attachimg=1]
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Cool!
But I'm too cheap/mean so I just put my hand on the pipes and if they all feel about the same, I'm good!!!
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That's great, very useful for setting these bikes up i bet
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Reminds me of the rotary Norton exhaust Ash when it was being bench tested and glowed bright red.
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I bought this setup to look for hot-spots on some electronics I am designing for work ... but useful for bikes too.
BTDT (I'm in HVAC, got me a CAT S61 phone featuring FLIR...)
Diagnosed clogged idle jets on both rear cylinders of a '96 ST1100:
[attachimg=1]
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Reminds me of the rotary Norton exhaust Ash when it was being bench tested and glowed bright red.
The later (one plug per rotor) NSU RO80 car had a warning in the handbook about not parking the vehicle on grass.
The catalytic convertor front pipe glowed cherry red despite all the heat shields there was a real fire risk.
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I seem to remember the same advice for my VFR800. After the mild steel heatshield had rusted through and disintegrated.
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I reckon if I did a better scan the 400/4 downpipes image would make great wallart for a man-cave/den 🤣🤣
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Yeh. Limited edition prints for us SOHC sados. 🙃
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I wonder what one of my lungs would look like? :o :o
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Yeh. Limited edition prints for us SOHC sados. 
Would make a great piece of wall art!
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