CBX 1000 not-so-super-sport

[Jeff Bennetts]

The airbox will not increase the HP, it will make the power delivery smoother with the intended vacuum back and you can go back to the standard jetting.


But when most people put an aftermarket pipe on they shimm the needles .020 and use a larger secondary mains, like 110

[daves79x]

You would really need an early model airbox. Subtile differences in late model box/intake rubber angle. They are plentiful over here, at least. But don't let my negative comments about pod filters stop you from finding the problem with the bike the way it is. They can be made to work pretty well, especially on the top end, where yours seem to fall flat. Do the checks we suggested and something will be found.

Dave

[Jeff Bennetts]

You would really need an early model airbox. Subtile differences in late model box/intake rubber angle. They are plentiful over here, at least. But don't let my negative comments about pod filters stop you from finding the problem with the bike the way it is. They can be made to work pretty well, especially on the top end, where yours seem to fall flat. Do the checks we suggested and something will be found.

Dave

What Dave said,
the other problem with pods is there are more variables to work with, adjustable needles, jet sizes, slight hesitation when opening the throttle wide open and the pods are sensitive to any air disturbance like a side gust of wind or your knees being too close to the outside pods.

You can get them to work, it's just a lot more work than a bike with the stock airbox, I was fortunate enough to have a Dyno available to me when I set up my Dyno Jet 3 kit with pods on my 79 CBX.

Go through this thread and pick out the 5 or 6 things that Dave and I have mentioned and you will get it sorted out, if it's something we missed we'll be very interested to find out what it was, everyone likes a good mystery, especially when someone else is doing all the work.

Good luck, send the paypal to

[Mosseltje]

It is really a shame that the workshop is closed for 3 weeks now.
An intern guy is watching the shop and he cannot find the information regarding the used jet sizes.

I can wait three weeks or try to do it myself.

If I do it myself I will probably ask hundreds of questions on this forum.

Like :
Are all Keihin jets the same or do I have to search for carb model specific jets?
Would it be a good idea to purchase a dynakit stage 3 first?
Can I change the jets with the carbs on the bike or do I have to remove the carbs from the bike?

[Mosseltje]

Thanks for all the help.

After some thinking I come to the following believes:

Pods are difficult to get right
Even if you have them working, side winds and such will disturd the carb working
I had water in my carbs when I bought the bike probably because of driving through the rain. Which happens often here in The Netherlands.
My knees are touching the outside pods and I got oilstains on my pants.
My track days are over so the little powergain in the top revs are not what I am looking for.
I do not even like the looks of the pods on my bike.

So today I purchased an early model airbox from the internet.

[Jeff Bennetts]

It's obvious you're approaching this with some common sense and you have done your homework, pods will work but like you have found out and Dave has stated they are not for everyone.

Prepare to open your wallet, my suggestion is take your time buying the airbox, make sure you are getting everything thing you need;
1. inner airbox with the lid, two fasteners that secure the lid and the air filter retainer spring.
2. All the clamps, the clamp that holds the inner and outer air boxes and the clamps the connect the outer box to the carbs.
3. The rack of clips that are on the side of the airbox that secures the connector blocks from the wiring harness.
4. You are going to need the two rubber grommets that secure the airbox to the frame if your's are gone.

The 79 and 80 inner airbox and lids are different, the 79 airbox has a spring type latch that fits over the lid that has a raised knob on the top of it, the 80 does not use this.

There are more technical terms for the the inner and outer airboxes but the inner airbox is where the filter goes the outer has intake horns that balance the intake runners, when you buy this make sure you ask the seller if those intake horns are inside and haven't been stripped out.

If I have forgotten anything someone will chime in for you but regardless look at the schematic of the airbox assembly at http://www.Bikebandit.com or http://www.cheapcycleparts.com

See how easy this is? By the way you are a member aren't you?

Good luck.

[Jeff Bennetts]

It's obvious you're approaching this with some common sense and you have done your homework, pods will work but like you have found out and Dave has stated they are not for everyone.

Prepare to open your wallet, my suggestion is take your time buying the airbox, make sure you are getting everything thing you need;
1. inner airbox with the lid, two fasteners that secure the lid and the air filter retainer spring.
2. All the clamps, the clamp that holds the inner and outer air boxes and the clamps the connect the outer box to the carbs.
3. The rack of clips that are on the side of the airbox that secures the connector blocks from the wiring harness.
4. You are going to need the two rubber grommets that secure the airbox to the frame if your's are gone.

The 79 and 80 inner airbox and lids are different, the 79 airbox has a spring type latch that fits over the lid that has a raised knob on the top of it, the 80 does not use this.

There are more technical terms for the the inner and outer airboxes but the inner airbox is where the filter goes the outer has intake horns that balance the intake runners, when you buy this make sure you ask the seller if those intake horns are inside and haven't been stripped out.

If I have forgotten anything someone will chime in for you but regardless look at the schematic of the airbox assembly at http://www.Bikebandit.com or http://www.cheapcycleparts.com

See how easy this is? By the way you are a member aren't you?

Good luck.

PM me, no promises but I may have a source for the airbox assembly.

Jeff

[daves79x]

Jeff has a pretty good list of parts. You will find the spring clip for the air filter hard to come by, but you will need it. The stock filter screen would be nice too, then you can use the stock foam filter (still available). Lacking that, you can go with a paper element of the late model. I'd stay away from a K&N drop-in as more jetting issues will arise. You'll also need the breather tube and clips and the airbox drain hose. Hope what you are looking at has all that stuff. If not, we here can probably scare up the odds and ends. You can then of course go back to stock jetting in the carbs.

Dave

[EMS]

I would check ebay for most of the parts. There is a basic airbox with all the major plastic parts on ebay.de right now with a low starting bid. Being in the NL, this would be the best way for you as shipping will be moderate.

http://www.ebay.de/itm/Honda-CBX-1000-C ... 2c66b6b9e5

[SteveG]

Thanks for all the help.

After some thinking I come to the following believes:

Pods are difficult to get right
Even if you have them working, side winds and such will disturd the carb working
I had water in my carbs when I bought the bike probably because of driving through the rain. Which happens often here in The Netherlands.
My knees are touching the outside pods and I got oilstains on my pants.
My track days are over so the little powergain in the top revs are not what I am looking for.
I do not even like the looks of the pods on my bike.

So today I purchased an early model airbox from the internet.

This is a man with a mission! Wonder if it is the airbox EMS mentioned.

Steve

[Mosseltje]

It is a complete airbox for a CB1.
The seller don't know if it is a model 1979 or 80 but if it doesn't fit I may return it to the seller.

It's old but with some spit and shine....

[Jeff Bennetts]

It's an 80 lid, see the bump for the retaining clip on the top of the lid? But I don't see the retaining clip on the airbox so it could be an 79 airbox and it looks like you need the hoses and hose clip that Dave mentioned.

Looking closer is that the bracket that should be holding the retaining clip I see there through the dust? If so it's all 80.

Looks like you're missing the lid hold down fasteners, they are SPL and I see them on EBay new all the time, maybe they're still available?

Good score either way.

I had that backwards, needed to edit it.

[Mosseltje]

I brought my CBX to Sixcenter, the specialist in Holland.
After cleaning the carbs he noticed the slide in carb no. 5 did not open all the way.
He fixed it and now I have 97,8 horses available.

I got rid of the pods and installed the original airbox but with 1 big single K&N filter.
Also have the original 6-6 pipemasters installed.

The bike finally runs perfectly and I am deeply in love.

However it is still a pita to get the bike started when cold.
Sometimes I have to push the starter for 5 – 10 minutes before the bike finally pops alive.

Any tricks for this inexperienced CBX’er?

[EMS]

Has your 79, by any chance, been retrofitted with the vacuum fuel valve behind the petcock?

[Mosseltje]

As far as my (very humble) knowledge goes the petcock valve on my CBX is still 100% original.
But I placed a fuelfilter between the valve and carbs.

I have this crappy photo



Last time I tried to start the engine till the battery had no more juice but the CBX would not start.
15 minutes later after recharging the battery the CBX started right away.

What is the magic trick for cold starts?
Choke out and push the button or do I need to twist the throttle a few times before starting?


This is my first classic bike and I really love the personality of the bike.
Driving this bike gives much more feel for adventure than my other modern bikes.
But I still do not dare to take long trips from home with this bike.