Keihin jets

[IronJimCb]

Hey guys and girls

Anybody got any Keihin pilot jets #38 and Keihin main jets #82 or larger that they don't need and want to sell to me?

Thanks in advance

Jimbo

If you've never owned one you'll never understand

CB400F

[AshimotoK0]

Don't faint wish shock everyone but my missus told me on Sunday she wants me to get my 400/4 on the road for 'Sunday jaunts..It last ran in 1986 ! !! ....I think it has larger main jets as it originally had K&N pod filters..... so you can have those if you want them as I am going to get the correct standard ones for it .

[Nurse Julie]

Don't faint wish shock everyone but my missus told me on Sunday she wants me to get my 400/4 on the road for 'Sunday jaunts..It last ran in 1986 ! !! ....I think it has larger main jets as it originally had K&N pod filters..... so you can have those if you want them as I am going to get the correct standard ones for it .

Oh Ash, does this mean your actually going to have a bike on the road? 😃😃😃 Mind you, after 30 years off the road it may need a bit more attention than just the jets changing!!!

[IronJimCb]

Don't faint wish shock everyone but my missus told me on Sunday she wants me to get my 400/4 on the road for 'Sunday jaunts..It last ran in 1986 ! !! ....I think it has larger main jets as it originally had K&N pod filters..... so you can have those if you want them as I am going to get the correct standard ones for it .

Iv got the standard main jets for a 400 4 and the pilots......swapsies?

What size are the mains ?

If you've never owned one you'll never understand

CB400F

[AshimotoK0]

I will check ...gonna be weird removing those float bowls after 30 years!

[AshimotoK0]

Well that was scary  . When I laid my bike up in my bro's  barn in '86 I deffo drained the carbs but left the tank full of petrol. My nephew/niece used to play on it when it was in the barn  and all I can assume is that they must have turned on the petrol tap at some point 'cos there was horrid smelling fuel in the carbs. Just hoping they will ultrasonicaly clean out  OK. Then I will treat them to a Yamiya carb kit rather than Keyster or Cruzinimage ( don't trust any of Cruzinimage's rubber components).

The standard main jet is 75 but mine had 90's in, which I assume came with the K&N's it was originally fitted with. No need for swapsies , you can have them, as everything is in the Yamiya kit. Perhaps someone has another size too for you to swap.

http://www.yamiya750.com/index.php?main_page=product_info&cPath=179_273_207_214&products_id=3041

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[tom400f]

Ash - they will clean out just fine. Main problem would be if the pillars supporting the float pin have corroded away at all. Be careful in case they are weak.

[AshimotoK0]

Ash - they will clean out just fine. Main problem would be if the pillars supporting the float pin have corroded away at all. Be careful in case they are weak.

Cheers .. Yes ..I am making a tool to try to push the pins out out without putting any undue  force on the pillars. The other thing that concerned me was the bottom of the casting that the main jet fits into but it looks OK internally. I have one carb body in the US cleaner at 70°C at the mo' in Allendale carb fluid, so fingers crossed. I think I will remove the cam cover too and put a bit of Trigger recommended Graphogen on the top end before I start it. I put STP down the bores in '86, as I remember and it does turn over fine. I am replacing the Antrares Red tank with a Varnish Blue one (as it's an early F)  and the Blue one is squeaky clean inside. If I remember correctly, I think cam cover comes off without removing the engine. Is that correct anyone?

IronJimcb ...hope I am not hijacking your thread? 

[Orcade-Ian]

Hi Ash,
Yes the cam cover comes off and back on easily with the motor in the frame.  It's how I do it on my own - bottom half in, barrels on, head on, cam cover on, breather cover on.  I'm getting too old to lift a complete unit into a pristine freshly painted frame!
Ian

[Trigger]

Ash - they will clean out just fine. Main problem would be if the pillars supporting the float pin have corroded away at all. Be careful in case they are weak.

Cheers .. Yes ..I am making a tool to try to push the pins out out without putting any undue  force on the pillars. The other thing that concerned me was the bottom of the casting that the main jet fits into but it looks OK internally. I have one carb body in the US cleaner at 70°C at the mo' in Allendale carb fluid, so fingers crossed. I think I will remove the cam cover too and put a bit of Trigger recommended Graphogen on the top end before I start it. I put STP down the bores in '86, as I remember and it does turn over fine. I am replacing the Antrares Red tank with a Varnish Blue one (as it's an early F)  and the Blue one is squeaky clean inside. If I remember correctly, I think cam cover comes off without removing the engine. Is that correct anyone?

IronJimcb ...hope I am not hijacking your thread? 

Graphogen is for new bearing surfaces, NOT old Ash

[AshimotoK0]

OK Graham ..I understand now about your Graphogen stuff .. what would you put on the cam /  followers , of used components then? I originally assembled it with STP as that was the done thing in '86.

Put together a little press thingy after work to push out the brass float pins. It worked great on the first carb.  I think I can recover them OK  and the slides etc look pristine. Forgot how nice an neat the 400/4 engine is.

[Nurse Julie]

OK Graham ..I understand now about your Graphogen stuff .. what would you put on the cams followers then, of used components then? I originally assembled it with STP as that was the done thing in '86.

He can't answer you Ash, he's having a heart attack whilst writing out a parts list for the next restoration, he's gone a funny colour blue and is foaming at the mouth whilst bashing his fingers on the calculator. But, I know he uses a product from his favourite 99p shop, it comes in a huge tub and he buys it in bulk and it's Vaseline 

[AshimotoK0]

Here is the tool I used for freeing up the stuck float pin.  A bit of M2 stainless thread in an M2 die twin-stuck to a little clamp I found at work. M5 half nut at other end.

Now back to original thread ...sorry Jim    :.

I will post your #90 jets off today &  I do have a spare set of #35 slow jets but guess they are no use to you as probably standard. No need for swapsies as I am ordering 4 carb kits from Yamiya.

Can anyone remember who wanted some CB750K7 jets on here a week or so back ? ...  as I may have found some.

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[Nurse Julie]

That's a nifty little tool Ash. I am only just beginning to realise how lucky I was not snapping the posts on my 400/4 carbs when I changed all the internals. I removed the pins with a nail and a big metal hammer  Ignorance is bliss, so they say.