Roketa MC-16-50 HELP!!!

[jamesrhull]

Okay, so my stupid mistake  was the cause of my latest problem.  When I corrected the spring placement, the scooter started and ran fine  on the test ride.  Thanks for the advice and help. I appreciate having a place to come to guide me in my learning.

[Fox]

Hey man we just pointed you in a direction. You're the one that eventually figured it out and rectified the problem. The devil's in the details with these engines and you spotted the flaw.

Have your first Karma point on me!

K+     

[jamesrhull]

Thanks, Fox.  It is good to have someone with experience that can at least point one in the right direction.

Now I find that my great fix seems to be having a few problems.  The scooter runs great and has no issues once running.  I have noticed though, ever since I cleaned the carb and got things put back together in proper order that a small pool of gasoline accumulates under the scooter after it has set over night.  It is not a large puddle, but I am having a leak and I cannot seem to find it.  The bike starts right up, so the carb is not draining.  Any ideas from those of you much more experienced than I?

[chris-bob]

I had that problem too.  My solution was to replace the fuel line from the tank to the carb.  The line had gotten a little stretched(enlarged diameter) from repeated removals.  Might want to check yours.

[Fox]

It could be the fuel line and it could be the automatic fuel shut-off valve is faulty.  Between the tank and carb is a spring loaded diaphragm valve that is operated via engine vacuum. It opens when you start the engine and closes when you stop the engine. The float valve inside the carb is too weak to overcome the fuel pressure in the line by itself so the fuel valve cuts off the flow of fuel into the carb. If the valve goes bad then the carb can overflow slowly when the scooter is parked.

Most 50's have a valve that bolts to the tank with a strainer that projects up into the tank like the ones pictured below. To test you remove the fuel line from the carb and see if fuel runs out of the line. It should not flow out freely. There will be a little bit of fuel in the line but that's all that should run out. Sucking on the vacuum line will open the valve.




 Sometimes the valve is bolted to the frame:

[jamesrhull]

Thanks guys.  I will check both tonight. 

[jamesrhull]

Turns out the leak was from the float bowl.  I had pinched the neopreme gasket when I put it back together.  Did a better job today and, so far, no leak.  Thanks again for the advice & help.