Honda-SOHC

Quote from: Honda enthusiast on April 29, 2024, 08:04:33 PM

Just thought I'd ask my floats are at 22mm and it's running very rich, I have Hendler carb kits on the way as I suspect a wire has been used to clear the jets....can anyone please confirm the float height...

You may want to double check your measurement first, by applying this method: http://forums.sohc4.net/index.php/topic,185754.msg2151647.html#msg2151647
I measured 50ml exactly but I wouldn't worry if you measure 2ml more or less.

Thanks that's a good way of checking, I'll try that later....just at the moment I'm rebuilding the carbs after a strip and clean...all the original brassware is in there but someone has been in there before to take the slides and needles out.
I'm going with what I understand is correct for the US K1 at 22mm float height and needle at notch four of five from the top....if anyone thinks differently please say so....thanks

I found the mixture screws were set at one turn out and float height was 26mm , presumably to compensate

I have been an electronics design engineer for yonks  but all of my bikes apart from my 400F (which came with Boyer Bransden Mk3 when I bought it in 1985 and still works OK) will be fitted with the standard arrangement. I think it depends on how many miles you will be covering... not a lot in the case of most classic bikes. The standard ' Kettering' ignition system on these bikes works well ...so if it's not broken ... blah blah. When I got my 1st 400F in 1978 I designed a CDi which used the standard points and did over 20k miles with it fitted (with a couple of popped main capacitors along the way ... capacitor technology then was not really designed for CDi only valve colour TV's). I never changed the points and there was never any significant  wear on the heel of the contact breakers, so the timing never went out. This was with either ND or Hitachi points though ... heard nasty stories about Daiichi points/condensers but that may be that there are lots of Chinese ripoffs around.

So if you are only doing relatively low miles and you can find  decent quality, preferrably OEM points and condensers, then I would fit the standard system. One DS system I saw has the electronics on a circular PCB that replaces the points plate. Irrespective of if it functions OK it only looks to have rudimentary weather/vibration protection and that would really put me off.

I think the original Boyer system possibly draws more current than standard due to it's unique (and patented IIRC) design.
My CDi system used an inverter which drew low current at low revs and higher current at high revs. This is the revers on the standard system.

Oddjob swore by the Hondaman ignition which basically does what my CDi did but just utilises transistors to switch the coil current rather than through the contact points rat. Mine whacked 400VDC across the coil from a charged capacitor... which is what Honda did on the CX500/Superdream etc. etc. ... Like my CDi, with the Hondaman ignition, you can simply revert to the standard setup with a switch because both use the standard points and auto-advancer.

Overthinking I suspect is the norm for members here "act in haste repent at leisure" springs to mind as the alternative.

Shouldn’t be a problem John booking now for next year. Having said that there is the island games held here next year 12 - 18th July not sure if that would be a problem for you.

I am feeling inclined to go middle of June,

Guessing a about an 18day jaunt,

Mind, I might have to cut it short if I run out of Avon spray



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