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Yes. I made sure the sliders where in place when I slid the variator back on. But, I will check again just to make sure something stupid like that didn't happen.

Defiantly need the air box or just the air snorkel with a filter on the end of that. I just went out and bought another carb for my scoot. It does not look like that one you posted but more resembles my original except it sais Japan on the side. I took it apart and checked the jets. It had a 108 main and a 37 pilot. I changed them to a 125 main and a 38 pilot. I also checked the needle jet. It was adjustable unlike my original carb. It was set on the lowest setting so I set it on the 2nd to the top slot. It has 4 slots. I put it together and walla. First I noticed that the enricher worked like it was supposed to. Then after it warmed up, I went and adjusted the air mix screw. And finally, I have response the way you are supposed to. I took it out for a test drive and it is stupid windy out. Earlier today, I could not get my scooter up over 60 without it surging and bucking. Now, it goes like crazy and no bucking or surging and a smooth 70mph. My carb was the problem the whole time. I still have a little fine tuning to do but it is way better now than before.

Are looking to rejet your carb or want to replace the carb? What engine do you have? The Yamaha clone or the Honda clone? The Yamaha is a horizontal engine and the Honda is a vertical engine.

I got it all back together and didn't leave anything out of the carb. I did notice that there was rubber residue in the air mix screw but I don't see where it was blocking anything. So I started it up and let it get warm and started to adjust the carb. Again, I could close the screw all the way and wait and nothing happens. Idles perfect. I backed it out 1 3/4 turns and waited and nothing changed. I ran the rpms up and it surges a little between 4500 and 5500 rpm. So I started backing the screw out more and after about 3 turns it started to slow down. So, I turned it back in a 1/4 turn at a time until I achieved top rpm at idle and was running smooth. Ran the rpms up and no longer have the little surge between 4500 and 5500. I took it for a test drive and it runs out perfect for now. I'm going to drive it like this for a while and see how it does. Still don't seem right about the mix screw. Maybe I will swap out then 38 pilot for a 34 since you mentioned it just to see if there is a change. I wouldn't think the 38 is too big.

Read more: thescooterprofessor.proboards.com/post/new/3651#ixzz30Us3SnFC

I just checked the mix screw. I thought I had found something but ended up being nothing. The washer was not there. The spring was setting up against the o ring and the washer is non existent. After taking parts from another carb to make it right, the only thing different is that it idles smoother. Still, I get no response from the mix screw in either direction. There is something else that bothers me about this scooter. Since new, In my mind the auto enricher never worked right. When I start it up cold, it idle slower, around 1k. As it warms up, it will idle faster until it reaches about 1800rpms when fully warmed up. I called the company I bought it from and they sent me another enricher. It acted exactly the same way. Hmmmmm? maybe that is the way it is supposed to be on these. I am used to my old 150cc where it acted the opposite and I could adjust the carb mix screw. This thing is acting nothing like that. I would like to hear from others who have this same type of scooter with the 172mm 250cc engine on how it acts while warming up and how it runs out right. Maybe I am all wet in thinking something is wrong with this scooter. What are your thoughts?

I took it for a 10 mile test ride. It is very windy today so it was a good test. I did not have any issues while it was under driving load. All seems good. No popping on decel or excel or at cruise. No loss of power. Only does it when it in the garage while trying to tune it. It bothers me that I have no response at the mix screw.

Yep. I am not disputing this at all. It is very obvious that the metal is very flimsy and inferior as is all the metal works on these Chinese scooters. A guy has to wonder about there process for making there threads. I think there is some poor old soul sitting in a sweat shop with a file and a stool and just filing away at metal parts to make something that resembles a threaded bolt or stud. It seams like you take a nut off something more than once and there you are, trying to figure out how to repair that stripped out stud or bolt, and or threaded hole. Very aggravating. And also, you are right Alley about my carb being a 30mm carb. My mistake about being a 32mm. I was wondering. Are Honda parts made any better for the CF250?