Honda-SOHC

Ashdowner, the screws are 1 turn out and it is running lean according to the plugs! Also the engine is running very hot which I believe also indicates lean!
I think to Richen the mix you screw the screws in but to make up this leanness would prob have them screwed right in! I believe needles are on the second notch!!

After explaining my problems to the carb supplier this was the response..

I am at a loss from here to determine what your real problem is. I do know that those carbs should not be your problem. No one but the ill advised uses 110 mains on a motor with 4-1 pipes. Are the plugs still black? Have you moved the timing plate around a little to see if that changes anything. There are also idle mixture srews that will need to be adjusted but you can't do that until it will idle on its own.. Have you tried a power balance to see if all cylinders are actually firing?
Like I have said before the carbs were run and setup on a known good motor and they passed all tests on that motor.
I still want to help but I can't drive over to see what you have to work with.

Any other ideas on this guys??

Alan

That is not what I want to hear!! I knew this was going to be a challenging affair hence why I purchased these carbs. The guy came recommended with 35 years of experience in carb building. I told him what set up I had m, pod filters and 4-1 delkevic exhaust and he said he would jet accordingly!
It's strange as it feels so close.. picks up through the revs but won't idle😩
Don't really want to dismantle such beautiful carbs and start re jetting but I think that's where I'm going to end up??

Thanks for all your input I really appreciate it!

So rather than mess around trying to discover any potential air leaks I've decided to order new rubber boots (genuine oem). This will mean carbs to head everything new!!
Professionally rebuilt carbs, balanced and synced on test motor, new boots with original clips, new manifold o'rings at the inlet manifold! This will hopefully mean no leaks! I can then put the balancer on and check there synced correct! Fingers crossed once the boots are changed the problem will be solved! I've added a pic of the carbs if anyone is thinking of ordering from this guy I highly recommend!!

The only stockist of genuine inlet rubbers hasn't any in stock.. although they do have aftermarket ones? Is there that much difference? Should I hold out for oem?

I know this may be a vaugue question but I am experiencing idle issues. I have a cb550 and have completed a top end rebuild replacing all gaskets, purchased a set of completely overhauled carbs from carburettor Keith in Oregon which were jetted at 100 mains 40 idles, synced and bench tested with a 'bolt on and go' promise! Static timing is adjusted spot on, valve clearances done new plugs etc.
It starts and runs up through the rpms fine however for it to start and run in this manner I need the choke on at 20% all the time?? Idle/air screws turned out 1 revolution!
The engine is running very hot too, after a 10 minute slow ride I cannot touch the rocker cover at all as it will scold my hand and could prob cook my breakfast on it?
The project is almost complete I'm just trying to resolve this problem so I can enjoy the fruits of my labour!!
Please help!!

Thanks flat four! I'm confused as it implies leaving the green from old reg connected as it is earth! Does that mean leave connected to old reg? Only I thought this new unit enabled me to remove old reg or does it mean leave it hanging not connected and remove old reg?
Appreciate the help!

Hey all
I'm struggling to find a uk supplier of a pre fabbed seat hoop for my cb550? Can anyone suggest anywhere.. would like one that comes with the slugs and ready to weld up!
Cheers al