Keihin VE65AAWE9 - Fully Explained

[ThePowster]

Evening chaps.

Sooo I've been busy with my spare set of carbs and I'm wanting to make these perfect.

I've ordered the Dynojet stage II kit for it, I've also ordered a rebuild kit for it which contains float bowl seals and lots of o-rings etc.

I'm at the stage now where it needs a major clean. So I've bought an ultrasonic cleaner to try and help get them perfect.

I have many questions about this carb and I'd like to build on this post and see me through start to finish so that anyone else reading this will also be a carb Jedi master by the end of it. 

I am eager to learn so let's start at the beginning for a total newbie and I'll help by adding pics and video tutorials so we can all see how she operates and share tuning advice etc.

The carb on the CB700S. What is it called ? Does this carb even have an identification? I've looked on it for some kinda markings and the only one I can see is this

Keihin VE65AAWE9



4 questions then to start and if anyone can answer any/all that would be a big help.

Q1. So am I right in thinking if I need to research anything to do with this carb, that's the model number for it ?

Q2. Does anyone happen to know if this carb is used on any other bike? The reason I ask this is my dynojet kit says it's for cb750 / cb700s so I'm assuming they are the same carburettor?

Q3. Is there such thing as an exploded diagram of this carb or a parts list for it so I can learn what goes where?

Q4. When it comes to a full and complete carburettor overhaul, what exactly are the parts that I have to replace? I.e.

Main jet
Idle jet
Pilot jet (same as idle?)
Emulsion tubes (applicable in this model?)
Float bowl
Floats
Float needle 
Float bowl drain screw
Diaphragm
Carb tops
Carb top spring

I can't think of what else is missing component wise? I'm sure some o-rings go in there somewhere.

I'll fire up some pics which I'm sure some will find interesting, but if anyone can elaborate on the 4 Q's above that would be most helpful 👍

[Bob H]

I am eager to learn so let's start at the beginning for a total newbie and I'll help by adding pics and video tutorials so we can all see how she operates and share tuning advice etc.

The carb on the CB700S...
Does anyone happen to know if this carb is used on any other bike?

To my knowledge they are identical to the carbs on my late model 750 (other than the smaller jets for emissions in California).
the rebuild kit I got from Partzilla (OEM) actuallty said 700s on the gasket set, but I ordered for late model 750 and installed them on 750.

If you start with page 5 on "what did you do to your NH today" you will encounter my thoughts on the carbs.
https://nighthawkforums.com/index.php?topic=39.60

You will also see a lot of input on special tools to reach the pilot adjusting screws - none of them will fit in the tight space. So don't get too hung up on that.

There are lots of videos on youtube re: carbs, and I likely watched all of them. It is a great orientation.
I spent a fortune on OEM gaskets and diaphrams from Partzilla. If money is tight you can try your luck with the super cheap ones on Ebay from China. I ordered them too, then changed my mind before they even arrived when I realized how much of my time was going to be spent, and didn't want to cheap out on parts.

The best $40 I spent was to pay for the educational video series from motorcycle md that I link to on pg 5 of that other thread. Although I did the carbs about 10 years earlier and know my way around tools, I found the videos very helpful. And it is for your exact model.

Here is a photo I took of me doing MY CARBS while watching a video from Motorcycle MD on the same carbs.



He also has various free videos, and some of them are part of that course (like how to remove the carbs) and you can see those on youtube to get a feel for if his lessons are a good fit for you.

As I mentioned in the other thread, I ended up getting gaskets from partzilla to make sure the fuel rail O-rings were correct (not included in the Ebay set I don't think) as they had been problematic and leaked if the bike sat for a month or so. the new O-rings solved that.

[ThePowster]

Thank you so much Bob for your input, really helpful and I'll be sure to check out th educational video series.

So while doing my own searching I came across this link:

https://www.cmsnl.com/honda-cb700sc-nighthawk-s-1984-e-usa_model1018/partslist/E++18.html

It appears to identify all the parts relating to th carbs. I'm assuming your source of partzilla is same / similar?

What I was looking for next on my to do list was to replace all the rusty rounded off carb top screws and float bowl screws with stainless hex head cap bolts that never rust or round off.

For example on the list it says for carb top screws: 

Screw pan 4x8.

I'm assuming that means M4 x 8mm.

I've sourced on eBay stainless hex cap bolts to that specification and they are a cheap upgrade. Should always be shiny and never cause me a problem in the future being stainless. I just hope the pitch is right.

I'm going to double check dimensions tomorrow and replace every screw with stainless hex cap bolts providing my understanding is right lol.

[Bob H]

It appears to identify all the parts relating to th carbs. I'm assuming your source of partzilla is same / similar?

Yep, looks like a very similar parts diagram.

My replacement screws was done 11 years ago... look just like the ones you found. Hex head stainless.

[ThePowster]

Morning chaps.

OK so I couldn't sleep much last night thinking about hex head bolts 

At the moment I am looking to replace 4 lots of bolts, those being, carb tops, float bowls, main assembly rail and choke rail.

Now the ones on the parts website linked above are slightly different to what I have measured, I think the parts say 6mm and mine measures 8mm for example. I am going to paint the rails and I have to go from what's on the carbs already. I have used my metal ruler and vernier calipers and triple checked so I am replacing like for like, only stainless hex.

For anyone wanting to do this, the parts list are as follows:

Carb Tops:        M4 x 8mm    0.7mm pitch
Float Bowls:      M4 x 12mm  0.7mm pitch
Assembly Rail:  M6 x 12mm  1.0mm pitch
Choke Rail:      M5 x 9mm    0.8mm pitch

I think anyone doing any kind of carb maintenance whatsoever and lets face it, at some time everyones going to have to get in there and have a clean and renew, it's important to upgrade the standard cross head rusty and more than likely rounded off screw heads and stainless hex heads will not only be shiny-shiny, but they will never rust or round and come off every single time.

There are a few other bolts or screws on the carbs that hold bits together, but not many now, just the odd one, and when I get round to it I will detail what they are, size and pitch and so on.

I can't wait to ultrasonic clean the carbs and spray paint the carb bodies black engine enamel after I've masked all the important areas. I am then going to paint the assembly rail and choke rail silver and paint the Khein logo and star in silver engine enamel too with a fine brush.

Right time to check out that video Bob mentioned

[Larry Fine]

You could buy just one screw of each thread size, any material or head shape, and try them before ordering the ones you want.

[ThePowster]

You could buy just one screw of each thread size, any material or head shape, and try them before ordering the ones you want.

Yep, this is another good idea that hadn't occured to me 👍 thanks.

[mollusc]

Wouldn't that be the same as the idea that I suggested of going down to the hardware store to check the screws there?

[Bob H]

Right time to check out that video Bob mentioned

To be clear, it is a $40 workshop consisting of 24 videos (not just one video).



Some of the 24 videos are already free on youtube, such as the one on how to remove the carb assembly from the bike.
And some of the videos are "throw away" like an introduction to the course.

I just did a screenshot of the list of lessons with videos, this is just what fits on one screen. There are more, such as assembling the carbs, installing, etc.



Again this is for the late model 750 which in the USA was 1991-2003 but I believe the carbs are identical on the 700s. I am not an expert, but after looking at many photos of carbs from both bikes and the parts listing, I believe they are the same.

Is the course perfect?  No.
Are there things I did a little differently when following through on my carbs while watching the videos? Yes.

Did I ever speed up the playback speed when his pace was dragging?  Yes.

Was it a great orientation, with a rudder in the water as a point of reference? Absolutely.
Would I pay $40 for it again?  Yes. Taking all that stuff apart and avoiding the confetti of disorientation was priceless.
------ He has the following 30 day refund policy on his site: ---------
Go through any of the courses, enjoy and learn from all the content, follow the steps, put in the work. And if you don't love it in the first 30 days of owning it, send me an email and I will refund you immediately.

[mollusc]

Forty bucks seems like a hell of a good deal for something so intensive on a topic that intimidates a lot of people.

[ThePowster]

Yes moll same idea only as I said our hardware stores here don't even offer that as an option. Be nice if they did. Be even nicer not have to leave home and have a selection of bolts to try.

I did order a bolt gauge today which came with a thread pitch on it, it's like a card that you slot bolts into so you can identify basically.

This course is definitely something I will invest in. Only today looking at the carbs I noticed all the choke plungers pulled out nice and easy but one was in solid. So I'll remove these on my next ultrasound pass.

Great link for the video will be worth the investment I'm sure and being me right up to scratch on all the terminology and procedures before I break something 👍

[Bob H]

One thing I learned the hard way is to take lot's of photos before taking stuff apart.
And more photos during disassembly.

Little things that you don't anticipate being an issue, that seem obvious. Like a choke or throttle cable routing.

Q4. When it comes to a full and complete carburettor overhaul, what exactly are the parts that I have to replace?

The gaskets of course. When you have the carbs apart, hold the diaphragm of each carb up to a bright light and gently stretch sections of the rubber inspecting for pinholes, slits, tears.

The jets you already ordered, other metal parts can be cleaned. Blow compressed air through all passageways and observe that they are clear of crud. The ultrasonic helps, but it is not a panacea.

[Pete in PA]

I only wish you had mentioned doing this before ordering the Dynojet kit.

Not only is it way too much $$$ they have you drill the slide, a big no no in my book.

Then they have their own jet # system and different needle profile that leaves you with no idea of further changes.

carbjetkits.com is only $25 uses the same jets, does all the figuring for you, and no drilling in 4 $140 slides.

[ThePowster]

Initially I wanted the Factory pro kit but that was twice the cost of the stage 2 dynojet kit.

I haven't actually received it yet as it was out of stock, I was.told it would be 12 days delivery. I emailed to chase it up 2 days ago and I've been ignored so tomorrow I'll request a refund and if that all goes ahead I'll give the carbjetkits a try 👍

[Pete in PA]

Carbjetkits.com has worked great  for me on 3 bikes and for others here.

Typically you go 1 step richer on the mains and a washer under the needles.

Works wonders.

If you can't be sure the previous owner didn't drill out the pilots replace those also.