Author Topic: Trying to jet my Airstriker carb........ (Read 14261 times)

Jimbo45 · « **Reply #15 on:** January 31, 2015, 11:25:07 PM »

Thanks guys, I am going to wait until my 42 pilot arrive, and go from there.

fearlessfred · « **Reply #16 on:** February 01, 2015, 12:22:04 AM »

Quote from: Jimbo45;49656

No, I had to turn in the IDLE SPEED SCREW (or slide stop screw), all the way until the spring was compressed, to get it to idle with the 52 pilot....NOT the airscrew. With the 52 pilot, I could back the air screw all the way out and it would still be rich.

Sorry I misread your post .I have never seen a 38 go as small as 42 ,it would make me think the float level was too high.Good luck with this.

Jimbo45 · « **Reply #17 on:** February 01, 2015, 09:13:57 AM »

Quote from: fearlessfred;49665

Sorry I misread your post .I have never seen a 38 go as small as 42 ,it would make me think the float level was too high.Good luck with this.

No sweat. I figured so. I may not be 100% with my terminology quite yet either. :shame:

Jimbo45 · « **Reply #18 on:** February 01, 2015, 03:27:52 PM »

Quote from: fearlessfred;49665

Sorry I misread your post .I have never seen a 38 go as small as 42 ,it would make me think the float level was too high.Good luck with this.

Hmmm, that occurred to me too. How common would it be for a brand new PWK to come with the float adjusted wrong? I don't really want to completely take off the carb if I don't have too.....it was kind of a pain to get in there properly. My intake system is fairly restrictive....stock air box, snorkle block off, outerwears box cover, and well oiled (Belray) Uni filter. It seems guys with the open UNI's and K&N's typically can run much bigger pilots from what I have been reading.

Jimbo45 · « **Reply #19 on:** February 01, 2015, 03:31:47 PM »

I am an idiot. I need to correct my posts. Carlos did send the correct needle. I was wrong, it does have the DGH needle with 5 clip grooves. I had the needle that I used in my boys 250EX rebuild in mind, that had 3 grooves, the same night I was inspecting the new PWK carb. I was confused and thought it was the needle in my carb. I need to get more sleep sometimes. :confusion:

Pumashine · « **Reply #20 on:** February 01, 2015, 03:52:45 PM »

If I could remember every jet or needle I put in each of my 6 bikes I proly would be a genius. Good luck with jetting. I would proly have to get someone else to ride my bike if I could not figure it out. You should not have to adjust your float level, but sometimes those can get jarred around in shipping. If you have the carb off you might want to check.

Jimbo45 · « **Reply #21 on:** February 01, 2015, 04:10:59 PM »

Quote from: Pumashine;49694

If I could remember every jet or needle I put in each of my 6 bikes I proly would be a genius. Good luck with jetting. I would proly have to get someone else to ride my bike if I could not figure it out. You should not have to adjust your float level, but sometimes those can get jarred around in shipping. If you have the carb off you might want to check.

Thanks. I will get it sorted out. It is pretty close, I am just picky, and for sure don't want to run lean and do damage. I am pretty good mechanically, and have jetted several 4 strokes over the years. I will get the hang of the two strokes. They are just too much fun! The power band kick takes some getting used to for me, when trying to feel the pull and listen to the sound, at different throttle settings. I think I will be able to nail it down on the next outing. The only thing that baffles me, was the power loss and boggy feeling it had after I slowed from the long full throttle run through the gears. I don't thing it was starving for fuel, since it ran strong all the way when I was on the gas. I tend to think it was loading up, after coasting a bit, maybe due to the idle circuit being rich still. I dunno, I never dealt with that on a 4 stroke. Or, I guess it could be electrical. I did put a known (I tested it) OEM coil and a new 5ohm boot, so maybe the CDI or stator is acting up. But then again, I would think one of those would show some issues when on the gas at high RPM if they were the cause. I will fine tune the pilot and see if it does it again. It sure was fun to ride, though, and I had forgotten how fast these things are! Been almost 20 years since I was on one!

Pumashine · « **Reply #22 on:** February 01, 2015, 04:47:48 PM »

Quote from: Jimbo45;49695

The only thing that baffles me, was the power loss and boggy feeling it had after I slowed from the long full throttle run through the gears.

2 strokes are pretty much instantaneous in throttle response. Sounds like its too rich in the midrange. Lots of us run the clip up a notch from the middle setting to get the needle a little leaner. If you run the clip up at the top then it might require a leaner needle to get where everything works good.

Jimbo45 · « **Reply #23 on:** February 09, 2015, 10:34:46 AM »

I had forgotten to update the thread on this side.

I put in a #42 pilot, and got the idle circuit pretty good at about 2.5 turns out IIRC. I had also raised the clip to the second notch to lean it out a bit, and raised the main a notch to a #162.

The idle is strong now, and on full throttle, it didn't bog, but seemed maybe a bit flatter on power than the #160, so main jet and idle circuit are looking pretty close. BUT, mid throttle range was BAD. It bogged constantly in mid throttle range, and it was so bad, I thought it was going to die out. I had to cycle between full throttle blasts and a fast idle putt, to get it back to my garage. Oops, I guess I made the needle worse by leaning it. I guess I needed to richen the DGH needle, which I wouldn't have expected, since this motor seems to like such lean idle and main settings.

I am going to richen up the clip on the needle, and see how it goes. My thinking is, if it is that out of whack (lean) with the needle in the second notch, I may need a different needle all together. Headed out in a few to see what happens.....

btw250 · « **Reply #24 on:** February 09, 2015, 10:45:52 AM »

How's your reeds?

Jimbo45 · « **Reply #25 on:** February 09, 2015, 11:00:12 AM »

Quote from: btw250;49994

How's your reeds?

They looked brand new. Carbon fiber boyesen, they appear to be.

btw250 · « **Reply #26 on:** February 09, 2015, 11:03:37 AM »

Ok not chipped or anything.

Jimbo45 · « **Reply #27 on:** February 09, 2015, 11:25:05 AM »

Quote from: btw250;49996

Ok not chipped or anything.

Nope. :redbull:

Pumashine · « **Reply #28 on:** February 09, 2015, 11:54:30 AM »

Quote from: btw250;49996

Ok not chipped or anything.

Yep, nothing like a broken reed trying to figure out whats wrong.

Jimbo45 · « **Reply #29 on:** February 09, 2015, 03:41:05 PM »

Progress! I put the needle clip on the lowest (fifth) notch, as rich is the DGH needle would go, and took it for a short spin. It runs much better in the mid throttle range, no more bogging and flaming out, in the mid throttle range! It is totally rideable now, but It does feel just a bit flat arond mid throttle, most noticeable at about quarter throttle, so I'm thinking I could go even a bit richer on the needle. This sort of boggles my mind, since the pilot needs to be about a number 40 and only using a 162 main jet (which are very close to being perfect). My next plan is to shim up the DGH needle with some stainless number 4 washers, the distance of another clip position or two. That will tell me how rich I need to go to be too rich. And from there I guess try to figure out a better needle that I can run on the middle notch, so I have some adjustability. Once I get the needle dialed, I will do some plug chops to fine tune the main (but it runs strong now). Thanks for the continuing help guys!