Topic: 1970 ko carb overhaul kits?

[slyguy]

I need to go thru them, what kit’s & availability is out there? I see yamiya sells their own for $70.00 a piece..ouch

[newday777]

I thought the Yamiya kit was for 4 carbs?
I haven't looked in a while as I usually get the carb gasket kits from Honda (South Sound Honda in Washington state).
Don't cheap out on the carb parts, especially Don't try to use the aftermarket brass parts. If you do, You'll be back again...
Clean and reuse the stock Keihin jets. Get new float valves from Honda.

[slyguy]

Is that link for early(70)carbs?

[BenelliSEI]

That link is not for your carbs if they use the 4-1 throttle cable (1969-70). When I rebuilt my 1969 carbs for my Sandcast (I was in a rush to make a show date) I used kits from vintagecb750.com. I was missing a few bits of “brass” and had no option but to use them.They are marked “made in Japan” and it all turned out fine and runs very well. The black rubber gaskets that go under the screw on carb tops are never the right ones. I simply take a 1/2” hole punch and open up the centre for the cables.

If you have all the original brass, most definitely reuse it all. Soak in carb cleaner, ultra sonic clean, then blast with air. Don’t be tempted to push wires or brushes through them. That will destroy the spray pattern. 

Make sure you break the rack apart and replace the “0” rings on the fuel “tees” connecting the carbs. If you leave the originals they will leak. When knocking the carb locating screws loose (a manual impact tool works best) be very careful. The early aluminum bridge is extremely fragile. Lean on them the wrong way and they will crack in two!

If you’re curious about how to bench sync those carbs, go through my project file on the “Early Sandcast Found”. About 2/3 (page 51) of the way through when I did the carbs, I answered these questions in more detail……

[newday777]

Is that link for early(70)carbs?

Now that I look closer no it isn't. Sorry about that.

[slyguy]

Thanks guys, yes 4 cable. I will check out you post benellse, Thanks

[BenelliSEI]

Thanks guys, yes 4 cable. I will check out you post benellse, Thanks

Good luck!