SOHC.co.uk Forums > CB750
Thought you may like this pic.
philward:
UK weather definitely - 15000 miles year but probably mixture of short and long rides. Tried all kinds - spraying oil down them! There wasn't many Honda 4s with std exhausts back in the day I seem to remember
Sent from my Moto G (5) using Tapatalk
Seamus:
Nice period picture. According to DVLA, its still about too.
Spitfire:
Great photo, I think a top box was compulsory back in those days, though I can remember going to the chippie once and putting all the food in mine, after a spirited ride home the food was plastered all over the inside of the box. Was not impressed, neither was my hungry mates.
Cheers
Dennis
K2-K6:
--- Quote from: philward on August 18, 2019, 11:41:55 PM ---UK weather definitely - 15000 miles year but probably mixture of short and long rides. Tried all kinds - spraying oil down them! There wasn't many Honda 4s with std exhausts back in the day I seem to remember
Sent from my Moto G (5) using Tapatalk
--- End quote ---
It's running richer than ideal that really compromised them, ultimately mix of condensation and effectively something towards sulphuric acid from sulphur mixed with incomplete burn that rotted them. Cars where the same, a friend worked in an exhaust shop of which the owner bought car rear boxes in at just over £1 wholesale, ultimately made him a millionaire from the markup on those. He said they were by far the most margin of anything he did business wise.
Notice that with catalytic converters and the consequential control of combustion, that scenario has almost completely dissappeared.
Andrew-S:
--- Quote from: Nurse Julie on August 18, 2019, 10:29:50 PM ---
--- Quote from: philward on August 18, 2019, 10:27:05 PM ---Those exhaust lasted well (71 to 77) Andrew - mine used to fall apart in the first year or 2!
--- End quote ---
The bike had only covered about 7,500 miles from new when I bought it Phil - it was first registered on 5 May 72 , although I now suspect it may have been down the road due to the K2 headlight brackets and no fork gaitors. I remember exhausts were not in great condition, so very possible the original HM300s?
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