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You base what I say off of one misspelled word.. but doesn't know how to spell doesn't.. you sure it's not someone other than some.. you might want to proofread your own comments before you try to correct my grammar... You can post all the pictures of your bikes you want... Just don't post other...

The kehein 43's and 42's (750/900)all have accelerator pumps. I live in Dallas Texas very hot very dry I have to fatten up everything on the carbs... The weather is getting nicer you might have to just start digging into it and see what you get but I would start at those valves easy to do don't...

We've been doing .005 intake and exhaust... factory specs are a little tight as I mentioned earlier...750s are known for running lean..it's the exhaust valve on that cylinder..... We are dealing with thousands of an inch so yes it can make a difference.and of course proper ignition timing.. if...

If not carbs,rings..were the gapped?.. installation went smoothly?... I use a second pair of hands if available ,and I made blocks to keep the Pistons from going down looks like tuning forks..good luck

I completely understand... I'm thinking more carburetor.. when you did Jets and the rebuild,.. did you use genuine kehein(jets,etc) parts.. aftermarket rebuild kits I've found have been pretty unreliable.

Seems like you got it covered.. you could check valve clearances.. go through and look for any big discrepancies... .005 intake/exhaust

Yes most of those tanks for those years are interchangeable.. my cb750f tank holds a little over 5 gallons... That's a lot of riding,.. there's not really a gas tank dent repair service.. if it's not too mangled the reputable body shop could take care of it, I got my used for a reasonable price...

Swap your plugs around or try a new plug and see if it still happens I've had bad plugs out of the box before sometimes we overthink things.

Are you using aftermarket bowl gaskets?..where is the fuel coming from?. unfortunately some aftermarket rebuild kits are not that good,... Is it coming from the overflow, or is it coming from the float bowls themselves?

Check spark,carbs,and compression.

Great ....1-1/2 turns out from gently seated

Stay away from aftermarket rebuild kits(junk)..and protect all gaskets from over spray from Gumout(carb cleaner)...older gaskets will deform...use a hair dryer or a heat gun on low on your rubber boots(airbox,intake)..it will make things a lot easier..and put all your linkages on..move airbox...

Well yes all opening at the same time from the same starting point I pretty much thought that was understood, and you surely wouldn't need gauges to find that out you can do that visually

I always give them a slight little tap when I first put fuel to them.. it can help seat but if you have all four overflowing that's a bit of a problem

Floats or needles.

I misunderstood you...synchronized carbs means they all open at the same time,..we still use mercury gauges... we start with air idle if there's any question not synchronize which I can get closer on the bench than most people with gauges,...air idle mixture is how you smooth it out, if that is...

Is...lol

1980 HONDA CB750F

Jet,then check your plugs,start screws approx 1-1/2 out from seated all air..if bike runs good leave alone.

I put 3 coats of Duplicolor- universal silver metallic.. Then two coats of clear,then decals after 48hrs of cure.then one final coat of clear(whole tank) to soften the edges of the decals,..which i might say was a bit tedious...it would be a understatement to say.."once you start there's no...

https://www.honda-decals.com/default.tpl?cart=lmfmdmli&id1=170&id2=189&startat=1&--woSECTIONSdatarq=189&--SECTIONSword=ww1

Finally!!!

Get a new head..its thrashed.

1980 CB750F.THANKS

OK, Thanks.