First & foremost, Nick, I'd say you have a duff battery. If it never exceeds 10V, then one cell (at least) is 'sulphated'; sulphate is produced within the cells and between the plates of lead-acid batteries. As a battery ages, it produces and deposits more sulphate, eventually short-circuiting the plates in one or more of the 2V cells. You appear to presently have a 10V battery!
Seems to me that your battery may have been sat on the shelf for a good while at the suppliers...
UP IN SMOKE!
Hey G, glad you did! CB250K. Ha, sold the damned thing, about 18months' ago; too many projects, too little time... Could never get those bloody CV carbs right! My CB77 is in UK now, and I've just recently uncovered it and moved it from The Big Shed and into The Main Garage. Just commencing work on the replacement frame, ready for transplanting all the cycle parts and tinwork. You may recall that my "CB77" had been built around a '61 CB72 frame by its PO; I bought a CB77 frame, with its DMV document/provenance, from the US, and shipped the whole bike/tools/machinery/inventory from my Spanish home, to the UK, about five years' back. It's not been touched (in earnest) since! I mistakenly had the crankcase halves alu-oxide blasted (should've gone for vapour blasting!), so I'll be on the lookout for a decent upper crankcase half for a '64 CB77 engine... Steve
Have you still got the '61 frame? Happy to trade a top crankcase (money either way). I'll start looking in my multiple 'small sheds'. What number range are you looking in? G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160 '66 Matchless 350 '67 CL77 '67 S90 '77 CB400F
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