Issues after carb rebuild

[anthony8488]

So I tackled the carb rebuild with pride until I reinstalled them. I used a randakk kit and followed the guide posted here along with the service manual. I checked bowls for leaks I ensured the accel pump was squirting like old faithful. I bench sync'd the carbs per the carb rebuild guide put them on and bike started up after a few primes, happy as could be I let it warm up and sync'd the carbs got them to were the needles all bounce within 1/8" or so then ran out of time for the night but noticed it revving up slower then I remember it use to.

I came out this morning started it up let it warm up at idle then wanting to double check everything I blip the gas and it stalled instantly. If I slow throttle it it would rev up though. Took the carbs off without draining them I pulled the throttle flaps open gas squirted right out, did it a fee more times still squirting through. Reinstalled the carbs. Started the bike then sprayed starter fluid around the boots no idle change. Now it's playing games with me after install blipping the gas didn't stall the bike out but it is revving slow. Turned it off searched for slow acceleration or revving most posts refer to jets being off or incorrect for mods (mine is stock, 65's and 105's with the Keihn logos on them and my slow jet unscrews so all are thoroughly clean) came back out started up the bike and now I'm back to blipping the gas stalls it.

What's my next move here?

[Kha]

I made a mistake of putting the mixing up the two jets when I clean my carbs. Have you check if they are the correct?

[Kha]

I put 102 on the main jet and 68 on the secondary. But it should've been the other way around. This is on my stock dohc

[anthony8488]

Kha, thanks for the reply.  I did check these and following the rebuild guide I left the secondary jets on the lifter it was attached to, to also ensure I didn't mix them up, so I know those are all where they should be any other thoughts?

Sent from my iPhone

On Apr 27, 2014, at 5:26 AM, "Kha [via Honda CB750'S]" <[hidden email]> wrote:

I put 102 on the main jet and 68 on the secondary. But it should've been the other way around. This is on my stock dohc

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[anthony8488]

After re reading through the carb rebuild guide looks like I missed the step to ensure the accel nozzle was clean in each carb. So far that's the the only other thing I can think of. Bike will turn right over and idle no problem still, just when throttling and revving is slow on the up. Will pull the carbs off again and double check the accel tubes/passages and nozzles for sure then also check make sure jets are clean again.

Still looking for any advice on this though.

[Kha]

Hopefully Tools1 will help you out. I'm beginner too. Did my carbs cleaning and ran into few problems
 also. Took a few weeks before I finally got my bike running good. Take your time bud.

[TOOLS1]

I am assuming you have a DOHC with CV carbs. I hate those things!!!!! I was hoping someone with more experience with them then I have would come along.
TOOLS  

[Kha]

http://www.hondachopper.com/garage/carb_specs/carb_specs.html

Hope that helps. I think your jets aren't stock according to the chart, but this is factory specs though. PO could've re jetted them.

[Kha]

Make sure the ball in the accel pump isn't stuck. I let soak in carb cleaner and used compressed air to blow it and see if it spray out. Wear goggles. Hondachopper is a good site. I also searched on Google about lean/rich condition while idling.

[TOOLS1]

Kha wrote

 Hondachopper is a good site.

Just go ask them a question about a DOHC CB 750, or any other bike for that matter, and see how good, and helpful they are.
TOOLS

[Kha]

I just used the tech articles.

[anthony8488]

Sadly yes they are the DOHC CV carbs, thursday ill have the time to pull them off the bike again and look them over. Like i said earlier reading through the rebuild guide again i see i missed the step to see if the accelerator tube nozzles in each carb are clean and spraying.

I am kind of hoping they are clogged some and that is the issue outside of that I'm not sure what else i should be looking into. all the other hot issue items i can find are not the issue in my case.

ill double check my jet sizes again also when i pull the carbs.

[icerigger]

The '82 should have 68/102 for stock setup.
If you've got pods, you'll need to tweak these in increments until/maybe you find something that works. every bike seems to have a different point for pods. Check around, there're a lot of guys claiming to have found the perfect jetting for pods, and they're all different.
If you're running the stock airbox, try going back to stock.
In either case, the 65 seems tight and could be giving you a lean condition coming on to the main.

[Kha]

Cv carbs are good just as long as it's stock setup. Lol. Accel pump not working will cause tons of problem. I would check everything on the outside of the carbs first before I go back into the carbs (its a pain to take them off and putting it back on). Fuel filters, good spark, etc. I've had problems with bike stalling and it turn out to be dirty fuel filter and dirty gas.

[anthony8488]

I somewhere got confused the day I had them all apart, they are in fact 68/102 and the bike is completely stock. 

Sent from my iPhone

On Apr 29, 2014, at 5:57 AM, "icerigger [via Honda CB750'S]" <[hidden email]> wrote:

The '82 should have 68/102 for stock setup.
If you've got pods, you'll need to tweak these in increments until/maybe you find something that works. every bike seems to have a different point for pods. Check around, there're a lot of guys claiming to have found the perfect jetting for pods, and they're all different.
If you're running the stock airbox, try going back to stock.
In either case, the 65 seems tight and could be giving you a lean condition coming off idle.

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[anthony8488]

I pulled them off and split them into twos to double check the accelerator tubes to ensure the little nozzles sprayed inside the carbs since I missed the step in the rebuild. I found two weren't spraying strong. 

Got them to spray equally now but when I took the carbs off the bike I also noticed my fuel filter was empty (while the fuel knob was set to on with a half filled tank that's atop a 6' ladder for when I prepped for carb tuning before these issues) so now I need to look into that as well before I can see if I found the issue. 

Sent from my iPhone

On Apr 29, 2014, at 8:06 AM, "Kha [via Honda CB750'S]" <[hidden email]> wrote:

Cv carbs are good just as long as it's stock setup. Lol. Accel pump not working will cause tons of problem. I would check everything on the outside of the carbs first before I go back into the carbs (its a pain to take them off and putting it back on). Fuel filters, good spark, etc. I've had problems with bike stalling and it turn out to be dirty fuel filter and dirty gas.

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[anthony8488]

Sent from my iPhone

On Apr 28, 2014, at 6:13 PM, "anthony8488 [via Honda CB750'S]" <[hidden email]> wrote:

Sadly yes they are the DOHC CV carbs, thursday ill have the time to pull them off the bike again and look them over. Like i said earlier reading through the rebuild guide again i see i missed the step to see if the accelerator tube nozzles in each carb are clean and spraying.

I am kind of hoping they are clogged some and that is the issue outside of that I'm not sure what else i should be looking into. all the other hot issue items i can find are not the issue in my case.

ill double check my jet sizes again also when i pull the carbs.

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[Kha]

I would just go to auto parts store and get a new filter. They're pretty cheap. Hope you tackle this prob soon. It's too nice out there to be stuck working on the bike. Lol. Did you try to adjust your fuel mixture screw yet? Its very important to get it right because it affect your idle alot. My bike would die so often coming off idle to acceleration. 1 1/2 turn is baseline and I got mine set at 2 1/4 turns out for it to stop doing that.

[anthony8488]

So I had some spray issues with the accelerator tubes and the nozzles they spray out so cleaned those up got good spray pattern and such put everything back together had it back on the bike. Go to sync the carbs and my #4 was about 1/4" higher then the rest but when I drop it down to the range it should be bike stalls out...fml...I messed with it a bit and since the bike stalled I couldn't get it started again before I drained the battery to much to turn over so have to let it charge back up before messing with it again. I had it spun 2 turns out on the mixture screws to stop the stalling coming off gas. Pulled the plugs after I killed the battery all four had dark tips so fuels to rich. So I reset fuel mixtures back to bench sync and re bench synced the carbs I will try the whole process again.

Anyone in the Lincoln CA area that has good knowledge with these carbs that maybe could help me out some? Also, does anyone know a reliable shop I can start talking too?

[Kha]

I think your on the right track my friend. Keep going before you take it to the shop. Was the bike running before you rebuild the carbs? Was the plugs new? After I was done with all my adjustments and test ride, I bought new plugs and it ran way better. If you fixed the stalling when giving throttle then you're going toward the right direction. 2 turns out isn't that much. I think 3 or more turns out is the limit before you need to start thinking rejetting. I recommend riding it after you get it running next time. Bench sync it, start it, ride it around, adjust idle mixture adjustments. Do it until it idles around 1.1k without stalling problems. Takes patience. New gas is a must. Seafoam it also. If you feel that you've done all the steps correctly while rebuilding your carbs then something else might be causing your problems.

I wish I could help you out in person but I live in IOWA and the closest Lincoln I know is in Nebraska. lol The shop will charge you crazy money unless you know and trust them. I dont trust any shop in town. Havent taken mine to a shop yet and I have no previous knowledge of carbs and motorcycles at all. Just a lot of reading and comparing different posts and service manual. Keep us updated