What does this mean!?!?

baldy110 wrote: You are putting in new plugs every time you read them right?

Yes, the plugs were brand new. I rand it around the block, and this is what they looked like:





Patton... My air cleaner is almost brand new. I adjusted the float height, but am having a hard time adjusting it to stock because I don't have the adapter for a clear hose test. I measure the float and think it is to spec.

I am running a PWK35 flat slide single carb. What is not making sense to me is that other guys are running this exact same carb on the same bike on the KZ Twin Forum, but they are running larger jets than me and aren't rich. So maybe it is my float level?

treitz wrote: ...I adjusted the float height, but am having a hard time adjusting it to stock because I don't have the adapter for a clear hose test. I measure the float and think it is to spec.....

Setting float height to spec often fails to produce the correct fuel level.
Fuel level is critical.
Whatever float height results in correct fuel level is the correct float height, regardless of what the dry upside-down on the workbench float height measurement happens to be.

The clear tube test may be performed without the special tool.

Use a size tube that fits snugly or self-threads into a side-located drain hole.




For carb having a large bottom drain hole, use a rubber grommet or short section of hose that fits snugly into the hole, and add a length of clear tube that fits snugly inside the grommet or larger hose section.
(This works for example on Mikuni smoothbore carb.)




Good Fortune!

I have the large bottom drain hole. So I'll have to find some sort of grommet or hose that will fit in the hole I guess.

treitz wrote: I have the large bottom drain hole. So I'll have to find some sort of grommet or hose that will fit in the hole I guess.

Short section of oil hose will usually suffice.

Minimal fuel seepage won't adversely affect the clear tube test.

Good Fortune!

Patton, unrelated to this post of yours can I pick your brain? I am running an exhaust valve clearance of 7 thousanths and intake at 4 thousands across the board on a 77 kz 1000.Engine is stock except for a 1015 set of JE pistons at 10 1/2 to one comp. Will I be ok if I don't ever red line the motor. I usually just cruise and very seldom hammer it hard.

kawasaki mike wrote: Patton, unrelated to this post of yours can I pick your brain? I am running an exhaust valve clearance of 7 thousanths and intake at 4 thousands across the board on a 77 kz 1000.Engine is stock except for a 1015 set of JE pistons at 10 1/2 to one comp. Will I be ok if I don't ever red line the motor. I usually just cruise and very seldom hammer it hard.

see www.kzrider.com/forum/2-engine/579976-va...factory-specs#579976

Good Fortune!

Thanks for the diagrams Patton. I found a rubber grommet in my garage that worked perfectly. My initial measurement showed 0 or "level." So I adjusted it to drop it to 3mm.

I didn't have time to do a running test, but I should have time tonight. Considering how much I leaned out my jets trying to compensate for it, I will probably be running pretty lean now and have to jet up.

Again, thanks for the help.

UPDATE: Took it for a spin around the block on my lunch break. Plugs are still black.

I think I will retest my float level tonight, and then move on to jetting. I have spend a lot of time jetting my pilot down, but haven't messed with my main much at all. Maybe I'll drop my main down and see what happens.

treitz wrote: I am running a PWK35 flat slide single carb.

So, you have a one into two intake with a single PWK35 carb. Where did the 3mm float level setting come from? The stock KZ 400 (I believe you have one) fuel level settings have no relevance, and the specs for the original application are not likely to apply.

Ignore any specs anyone gives you, unless it's someone running that particular combo.

To solve your problem you're going to have to experiment until you find settings that work. Try dropping the fuel level down 1mm or so at a time, you'll know when you've gone to far.

steell wrote:

treitz wrote: I am running a PWK35 flat slide single carb.

So, you have a one into two intake with a single PWK35 carb. Where did the 3mm float level setting come from? The stock KZ 400 (I believe you have one) fuel level settings have no relevance, and the specs for the original application are not likely to apply.

Ignore any specs anyone gives you, unless it's someone running that particular combo.

To solve your problem you're going to have to experiment until you find settings that work. Try dropping the fuel level down 1mm or so at a time, you'll know when you've gone to far.

Most guys running this same single carb set it to 3mm. I could try going down to 2.5mm as some of them have.

treitz wrote: ...am running a PWK35 flat slide single carb. What is not making sense to me is that other guys are running this exact same carb on the same bike on the KZ Twin Forum, but they are running larger jets than me and aren't rich....

Is there any possibility that the existing pilot jet might have been "drilled out" to a size larger than imprinted on the jet?

Have so far been unable to locate a diagram of the pilot circuit for the PWK35 carb.

Good Fortune!

Isn't there a screw to adjust volume of air allowed into the pilot circuit?

If so, maybe it's turned in too much and resulting in an excessively rich pilot circuit.

Could turn the screw out counter=clockwise one full turn and test run for effect.

Good Fortune!