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Scooters - 50cc => Super 8 => Topic started by: mlsmith2924 on May 02, 2017, 01:24:45 AM

Title: engine sometimes dies kymco s8 50x 2016
Post by: mlsmith2924 on May 02, 2017, 01:24:45 AM

Hey all,
I'm not much of a gear head, but I have been reading up on the forum and I removed a washer that was lodged in the tube from my carb to my engine.  This was definitely an upgrade as my bike now has much better acceleration.  However, when I am idling for a long time, for instance at a stoplight, and I accelerate my engine bogs down and sometimes turns off completely.  Is this an issue with the jetting of my scooter or do I need to adjust the air/fuel mixture on the carb?  If it is the latter, where can I find the screw to adjust the air/fuel mixture??

Title: Re: engine sometimes dies kymco s8 50x 2016
Post by: Mr. Paul on May 02, 2017, 09:53:17 AM

Low idle jet needs cleaning.

Title: Re: engine sometimes dies kymco s8 50x 2016
Post by: eamartin on May 02, 2017, 12:51:01 PM

Did this scooter idle properly before your modification?   

Title: Re: engine sometimes dies kymco s8 50x 2016
Post by: mlsmith2924 on May 02, 2017, 08:15:19 PM

when I accelerated it before the modification, and before storage it worked fine. I took it out of storage, made sure it was up to snuff and did the modification. Maybe I just didn't notice it before. I'll be able to check the carb tmrw and let you guys know.

Title: Re: engine sometimes dies kymco s8 50x 2016
Post by: eamartin on May 03, 2017, 12:33:44 PM

Now that you have mentioned that the scooter was in storage, I would agree with Mr. Paul's diagnosis.  Clean the idle jet (soak it overnight or longer in the appropriate carb cleaner).  Make sure you can see daylight through it before installing it.

Title: Re: engine sometimes dies kymco s8 50x 2016
Post by: mlsmith2924 on May 03, 2017, 09:39:03 PM

I checked the carb and it was clean, no residue anywhere. And upon checking it, the idle speed screw isn't working at all. Ive attached a couple videos to show what I'm talking about.

https://www.youtube.com/watch?v=hX4W_gSMpGY&feature=youtu.be (https://www.youtube.com/watch?v=hX4W_gSMpGY&feature=youtu.be)

https://www.youtube.com/watch?v=0T5oBdYgArg&feature=youtu.be (https://www.youtube.com/watch?v=0T5oBdYgArg&feature=youtu.be)

Title: Re: engine sometimes dies kymco s8 50x 2016
Post by: mlsmith2924 on May 21, 2017, 03:25:31 AM

Brought it to the mechanic and found out it was a carb issue, he was able to derestrict too while fixing the issue.

Title: Re: engine sometimes dies kymco s8 50x 2016
Post by: Mr. Paul on May 21, 2017, 06:27:26 PM

Thanks for the update!

Title: Re: engine sometimes dies kymco s8 50x 2016
Post by: eamartin on May 22, 2017, 01:58:00 AM

Quote from: mlsmith2924 on May 21, 2017, 03:25:31 AM

Brought it to the mechanic and found out it was a carb issue, he was able to derestrict too while fixing the issue.

What was the carb issue?