Idle staying too high

[BuffaloChinaRider]

On my apollo I just put a new pz30 carb on it. I have a 120 main and 42 pilot with pod filter. The bike starts great but just idles high AF and stays there. Even when I turn the idle screen it has no effect. I turned the air fuel both ways and still no effect. I'm starting to wonder if my jetting is too bit but I'm not sure. I'd appreciate any help! I just started back showing my china bike some love because I've been out on my Kawasaki ZX6r.

[JerryHawk250]

Check that you have the slide in the right way or enough slack in the cable so the slide closes all the way. There's a slot in the slide that needs to line up with the pin.

[BuffaloChinaRider]

I double checked but I'll check again!Also when I rev it...it stays high and slowly cones back down. I also have zero free play in my throttle and I think there should at least be a little. I adjusted it from the line up top but it didn't add any free play.

[JerryHawk250]

I double checked but I'll check again!Also when I rev it...it stays high and slowly cones back down. I also have zero free play in my throttle and I think there should at least be a little. I adjusted it from the line up top but it didn't add any free play.

Idle mixture is way lean. That sounds like an air leak in the intake. Check for damaged o-ring or gasket.

[BuffaloChinaRider]

Okay so I know have the air mixture screw turned out pretty far and I adjusted the throttle cable, the revs have now dropped a lot and almost idling normal but still slightly fast and when I hit the throttle too quick while at idle it revs but starts to bog. I'm gonna go from a 120 main down to a 115 and see if that helps. Thanks jerry! Not sure if going down here will work but when I turn the mixture screw out super far its getting better and better

[JerryHawk250]

Okay so I know have the air mixture screw turned out pretty far and I adjusted the throttle cable, the revs have now dropped a lot and almost idling normal but still slightly fast and when I hit the throttle too quick while at idle it revs but starts to bog. I'm gonna go from a 120 main down to a 115 and see if that helps. Thanks jerry! Not sure if going down here will work but when I turn the mixture screw out super far its getting better and better
Changing the main won't help on the idle. Pilot jet is too small. Try a larger pilot jet.

[JerryHawk250]

Did you plug the vacuum ports that the SAI was connected to?

[BuffaloChinaRider]

If you're talking about the emissions hoses and all of that I left it as it is stock. Also the jet kit I have only the main jets fit in this new pz30 carb. The pilot jets are different. There's a 42 pilot with the 120 main. I'm wondering if I can drill the pilot slightly bigger since my kit does not fit it. What do you think? And thanks as usual for all the help

[duck9191]

make sure the end of the cable is sitting fulling inside the top of the carb and not caught on the side. That will take all the free play out and possibly lift the slide.

does the cb move that much more air? I am running 38/118 in a pz30 with exhaust and pod filter on my storm and its rich.

[JerryHawk250]

make sure the end of the cable is sitting fulling inside the top of the carb and not caught on the side. That will take all the free play out and possibly lift the slide.

does the cb move that much more? I am running 38/118 in a pz30 with exhaust and pod filter on my storm and its rich.
Good point, I've had that happen a couple of times. A 42 pilot should be good.

[BuffaloChinaRider]

When I get home I will check to make sure the cable is sitting correctly. You're talking about the end of the cable up where there is a rubber boot covering the top of the carb?

[duck9191]

yeah,under the boot where the end of the cable is can get caught on the side of the nipple it sits in.

[Megadan]

A quick look down the throat of the carb can verify if the slide is seated all the way.

[franque]

Make sure that the bolts on the intake, from carb to intake, and from intake to cylinder head are tight, though I agree, most likely something is mis-assembled on the carb. It's easy to get wrong, don't feel bad if you did.

[BuffaloChinaRider]

Make sure that the bolts on the intake, from carb to intake, and from intake to cylinder head are tight, though I agree, most likely something is mis-assembled on the carb. It's easy to get wrong, don't feel bad if you did.

No definitely won't feel bad! Its all a learning process. I just got home I'm gonna check it now to make sure something is not stuck. So weird but even with my old carb on , I still never had any free play in my throttle. I really want to figure out what's going on and you guys are all very helpful, gonna go check then I'll report back, tha ks again everyone

[BuffaloChinaRider]

Just checked the throttle line is seated properly but I have zero play, even after adjusting things. The slide is also in the correct position as well i even pulled up diagrams to make sure I didn't have the slide backwards but its correct. Kind of running out of ideas lol

[JerryHawk250]

So we are back a square one. Intake leak. Remove the carb and intake and smear a little grease on them to help seal. Make sure the hose connected to the intake is connected at both ends and not cuts in the line. You could plug the vacuum line on the intake to rule that out. You should also have room for throttle cable adjustment at the throttle as well.

[BuffaloChinaRider]

So I readjusted the carb and made sure that everything was correct. Now it is not revving quite as high anymore but I have that idle mixture screw turn out pretty far and it is still slow to stop revving once I let off of the throttle

[BuffaloChinaRider]

Going to take it off and grease intake area now! And I'll make sure those lines are all connected. Thanks

[duck9191]

i would check the grip end of the cable too, the wire can get out of the grove and cause excess pull.

[BuffaloChinaRider]

i would check the grip end of the cable too, the wire can get out of the grove and cause excess pull.

I think you just solved my problem!!! Thanks alot. The cable was out of the throttle groove, I slid it back corrected fire the bike up, no more high sticking revs and it idles fine. Only issue now is I have to put the air fuel screw back to a decent setting because when I revved it.....guys it spit a flame from the exhaust and that can't be good. Gonna put it all together and take it onba ride to see how it performs

[BuffaloChinaRider]

Bike rode fine, just some popping here and there and i can smell a little unburned fuel from the exhaust.Holy heck I'm running very rich. My plug is charcoal. Idle screw is set fine. My mixture screw is set fine. Next step would be main jet??? I'm at a 120 right now with a pod filter. 6000 elevation in NY. I was thinking about stepping back down to a 115?? Not sure if that would help

[duck9191]

whats your storm at? should be somewhere close to that. im at 600' 38/118 and im still a bit rich.

The hawk i picked up had the same issue with the throttle cable, but it was sticking at like mid throttle.

[BuffaloChinaRider]

whats your storm at? should be somewhere close to that. im at 600' 38/118 and im still a bit rich.

The hawk i picked up had the same issue with the throttle cable, but it was sticking at like mid throttle.

My storm is bone stock and I believe the main jet is either a 100 or 105. Runs good. But again its bone stock. If I threw a pod filter and an exhaust haha things would change. Tomorrow when I get home I'll gonna put the 115 main in because my plug is pitch black right now when I checked it. I figured since I was going with the pod filter I'd jump to a 120 but its popping when I hit throttle and I smell gas. Runs and idles normal until I start moving.

[duck9191]

My storm is bone stock and I believe the main jet is either a 100 or 105. Runs good. But again its bone stock. If I threw a pod filter and an exhaust haha things would change. Tomorrow when I get home I'll gonna put the 115 main in because my plug is pitch black right now when I checked it. I figured since I was going with the pod filter I'd jump to a 120 but its popping when I hit throttle and I smell gas. Runs and idles normal until I start moving.

I have a uni filter and ebay exhaust and a 120 will cause me major bog. once the temp stops going from the mid 40's one day to the 90's the next im going to drop down to a 115 and maybe drop the pilot down a size.

[BuffaloChinaRider]

You have it all figured out! Weird to see how someone else I know in NY with a nibbi carb has a 120 and his runs okay. So weird. Maybe its the carb type as well?? Idk. He also lives out in the mountains of ny though so maybe its different. 115 it is and I'll report back tomorrow. Thanks again for all the help

[duck9191]

You have it all figured out! Weird to see how someone else I know in NY with a nibbi carb has a 120 and his runs okay. So weird. Maybe its the carb type as well?? Idk. He also lives out in the mountains of ny though so maybe its different. 115 it is and I'll report back tomorrow. Thanks again for all the help

yeah different carbs will have different requirements due to their design. Dan has covered some of the changes he has had to make switching between the many carbs hes tried. Even two bikes will have slightly different needs. If you guys are getting the huge temp swings like we are it will be a bit of a compromise until it gets into summer and the bike will favor a smaller jet in the hot air. trial and error, joy of carbs lol.

[Rocket tests]

Asside from the cable adjustment and clearing any snaggs, check that the plunger needle retention clip is seated and properly holding the needle solidly against the bottom of the slide. A bent needle could also cause dragging which also could make it slow to return to a proper idle.