HELP!!! Super 8 wont start!

[Noles4ever]

Purchased a used 2015 Super 8 50cc four stroke a couple of weeks ago.  The owner told me it had been sitting for a while and that it would not start.  First thing I did was take off the carburetor and the jets were pretty bad so I decided to get a brand new carb and installed it.  Empied the gas tank, blew out the fuel lines and put in non ethanol fuel.  Also installed a new NGK spark plug.  I am getting spark, fuel is flowing into the carburetor, it is getting air, but it just turns over with zero signs of wanting to fire up.  I tried spaying starter fluid in the carb and it did nothing.  I took the spark plug out and stuck my finger in the spark plug hole while starting and I am getting compression.  If the CDI is bad, will this cause it NOT to fire up??

Any ideas where to go next will be greatly appreciated!  I am stumped. 

[eamartin]

You are getting spark.  If you try continuously to start it, then remove the plug, is the plug wet? 

[Noles4ever]

thanks for the reply eamartin.  I have taken the spark plug out on several different occasions and every time I have checked, it is DRY. 
I just got a reply this am from a tech person and he says if I am getting spark then the CDI is NOT the problem.  Im not a mechanic but I am pretty handy with small engine stuff.  I am pulling my hair out with this one.  Makes NO sense why it is not firing. 

Let me know what you think!  Thank you

[tortoise]

50cc four stroke . . getting spark . . spaying starter fluid in the carb and it did nothing . . stuck my finger in the spark plug hole while starting and I am getting compression

Check valve clearance.

[eamartin]

I'd say that checking valve clearances is sound advice.  Does it appear that anyone has worked on this thing before ?

[Noles4ever]

The only thing I have seen that has been done to it is the pink/purple wire from the CDI harness was cut.  Based on what I have read in this forum, I think that wire acts as a rev limiter.  Other than that, I think everything else is stock.  It is still under warranty so I am hoping that I can take it in if I can't get it started and it be covered under the 2-year Warranty.  Does anyone know if the wire being snipped on the CDI will VOID the warranty??

[eamartin]

You mentioned that "fuel is flowing into the carburetor".  Have you verified that fuel is in the float bowl by opening the float bowl drain?

[Noles4ever]

Yes, I unplugged the gas line to the carb from the gas tank, sucked on the vacuum line connected to the carb and fuel was flowing.  I then opened the screw at the bottom of the carb bowl and fuel came out. I then put the vacuum line back on the carb and with the gas line still not plugged back in, I cranked the scooter and gas came out of the fuel line so it seems that I am getting good vacuum.

[eamartin]

So gas is filling the bowl but it does not seem to be making it to the combustion chamber.

[Noles4ever]

I think I am going to look into the valve clearance suggestion this weekend.  I looked in Kymco manual and it says both intake and outake valve clearance should be set .08.  Does this sound correct?? 

[eamartin]

I'm not familiar with Kymco specs.  Small displacement Honda 4-strokes are usually about .05mm.  So .08 is in the ballpark.  I just looked at an on-line manual for the Super 8 50 4T and it specified .08mm  .

[CROSSBOLT]

.08 what? Think most Kymco 4-strokes are .1 mm or .004 inches. .08 mm may be a little snug.

Karl

[CROSSBOLT]

I yield to the gentleman who has read the book! Thanks, EAMartin.

Karl

[tortoise]

.08 mm = .0031 inches

Tip . . the sidewall thickness of an aluminum beverage can is around .0035 inches.

[Noles4ever]

Sorry, I mean to type in mm.  Yes, it is .08mm.  I will give it a shot and see what happens.  Thanks to all!