SOHC.co.uk Forums > CB500/550

Carb secondary main jet

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Murf:
It does push the emulsion tube in ok either way around, I got concerned because of all the cock ups that have been made by POs, odd secondary main jets  2 x 100 and 2 x 115, also incorrect o rings on them so they were just lose fit in the tube. I was told when I bought the bike that the carbs had been balanced by a very well respected local bike restorer!!!
Anyway carbs rebuilt now and looking good, I just need to do static balancing and get the 2 100 size jets I need.   Oh and find the big horrible return spring which seems to have lost itself, I am sure it was in a tub  on the bench last week 🙄.
Thanks for all the advice I have had.

McCabe-Thiele (Ted):
My only advice when doing the bench synch is go for a small slider gap. That way I think reduces the chances of  dreaded hanging idle when hot.

Yes, I know it's never that simple.

Murf:
They seem to recommend about an 1/8 inch on the stuff I have read and looked at, would you go a bit smaller. I will balance them on the bike with the gauges when and if I get to bike and engine rebuilt point.  That’s something time next spring with luck.

McCabe-Thiele (Ted):
I actually went for a zero gap on my 500 (just at the point where the slider would start to lift), I used something like a 1.5mm drill bit on my 400.

Bryanj:
Smallest undamaged drill shank you can get1/8 is a bit big 1 to 1.5mm is about best

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