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CB750 F1 Project May 15
royhall:
There looking sharp Keith. Nice one. I will probably get flamed for this, but I to kinda like blued pipes. Shame they aren't all blued the same though. Guess they aren't double skinned on the F1 then?
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hairygit:
Yes, they ARE double skinned on F1, to go blue like that, one cylinder has been running very hot, for a long time, or the inner skin of the pipe has broken up/cracked or spllit allowing hot gases to discolour the outer skin. If it was running that hot, it could damage the piston (weak mixture), if the inner skin has failed, re-chroming will be a waste of money, as it will discolour again.
Coppertop1234:
Exhaust is from another donor bike which has a fine running engine, so I was informed.
I can only presume in its previous exhaust life it had some engine issues, to cause blueing of pipe,also slight yellowing on No 1 pipe.Personally I think the old engine was out of sync and running hot on the 2 effected cylinders causing discolouration.
I think i will still gamble and have them re-chromed again ,but thanks for comments
Chris400F:
Exhaust on the yellow bike looks like a Motad, in which case pipes would certainly only be single skinned.
Coppertop1234:
Just got insurance quotes from Bikesure
2 policies both with named riders so we can ride either - £121 each
Mileage 3k per year
Guaranteed value of 4k +£15
Excellent price I think
Keith Snr
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