Keihin pilot jetting

[pittss1c]

I am having a little difficulty...
When I get it started, it idles too high, but after a minute it idles pretty slow. (almost wants to die) If I go ride it, when I come back to idle, it idles fast, but calms down again in about 10-15 seconds to a low idle.

The air screw doesn't seem to help this behavior much.
Is this a lean pilot jet? I am pretty sure it is clean.

 

[03blasteryfs03]

sounds lean 2 me

 

[bundyho1]

I am having a little difficulty...
When I get it started, it idles too high, but after a minute it idles pretty slow. (almost wants to die) If I go ride it, when I come back to idle, it idles fast, but calms down again in about 10-15 seconds to a low idle.

The air screw doesn't seem to help this behavior much.
Is this a lean pilot jet? I am pretty sure it is clean.

Try a richer pilot,also try to screw the air screw in more...

 

[98blaster]

what carb is it and whats your setup and what pilot is in it now

 

[doc_speeder]

what carb is it and whats your setup and what pilot is in it now

x2 -----151515151515151

 

[pittss1c]

I have a keihin pwk 28 with a 42 pilot in it.
It turns out I may have a float issue.... The behavior seems to change a lot shortly after turning the fuel off. It looks like maybe the float is too high, which causes it to want to die which makes me have the idle turned up high... which make it hard to start... which makes the air screw ineffective... Let me take a look at that first and report back.

 

[98blaster]

the float height on a pwk 28 is supposed to be 19mm from the bowl gasket surface to the top of the float but you kinda got to hold the carb at an angle so the float isnt pushing down the spring pin in the needle

 

[pittss1c]

I think my float is way out of whack due to being disassembled by the previous owner improperly. I tried setting the float height yesterday, but I had to bend the tang pretty far to set it (obviously not right).
It is still leaking. I hope I don't have to get a new float to get it right.

 

[royalt67]

It shouldn't be that difficult. With the carb upside down, measure between the bowl's gasket surface and the top (currently down) of the float. Should be 19mm. Bend the tang as necessary to achieve that measurement as the float sits on the needle. As 98 said, you might want to hold it kinda sideways so you don't put too much pressure on the needle. You shouldn't need a new float, just take your time.

Also keep in mind there are two tangs, generally, one that limits float level (the one you want) and one that limits float drop.

 

[pittss1c]

Maybe I was unclear.... I know how to take one apart... the previous owner apparently did not. IN order to get the float within limits, the tang needs to be at a relatively extreme angle, and there are signs that the float assembly has been bent...I am trying to get it back in the right shape

 

[royalt67]

Maybe I was unclear.... I know how to take one apart... the previous owner apparently did not. IN order to get the float within limits, the tang needs to be at a relatively extreme angle, and there are signs that the float assembly has been bent...I am trying to get it back in the right shape

Oh, sorry. I guess I assumed....and you know what happens when you assume...

If you need a new float, these guys may be able to help you out:

Keihin Offroad Carburetors (CPW)

 

[98blaster]

if you need a float call cpw i belive they are in ohio and they sell any thing for that carb and have excellent customer service and sometimes the bowl can be a bastard to get on and off that carb pecause of the overflow tube goes between the float and the main jet its kinda tight

 

[royalt67]

if you need a float call cpw i belive they are in ohio and they sell any thing for that carb and have excellent customer service and sometimes the bowl can be a bastard to get on and off that carb pecause of the overflow tube goes between the float and the main jet its kinda tight

Yeah, I just had mine off yesterday (to change the pilot jet, lol) and at some point the float got tweaked even though I was very careful. It leaked out of the overflow when I was done. Had to take it apart and do over. (and adjust the float!)