Why does my scooter engine slowly stop running?
When the engine is cold and the valve adjustment is too tight, but not so tight as to keep the exhaust valve open, the engine will start. As the engine warms up and the valves and rocker arms expand due to heat, the valve is forced open and cannot close. You then have no compression and the engine stops running.
Why does my scooter stall out when idling?
And the obvious question, is your scooter stalling out when idling? If the answer to any of these questions is yes, they are all symptoms of your engine valves being too tight. Engine valves tighten over time after extensive use.
Why does my rocketa scooter slowly stop running?
I have a 2011 Rocketa 49.3 GY6 139QMB and have replaced the carburetor, petcock valve, CDI, all of the vacuum lines, adjusted the air flow and gas until it idles perfect and then, when I take off, it makes it two blocks, bogs down and dies! It will continue doing this about 5 or 6 times and then start running good but not great.
What to do if your motor scooter won’t start?
This is a key test to run before you go through the trouble of disassembling your carburetor. To set up this test start up your scooter and ensure the choke is off if your scooter has a manual choke. Most modern scooters have an automatic choke so don’t worry.
When the engine is cold and the valve adjustment is too tight, but not so tight as to keep the exhaust valve open, the engine will start. As the engine warms up and the valves and rocker arms expand due to heat, the valve is forced open and cannot close. You then have no compression and the engine stops running.
And the obvious question, is your scooter stalling out when idling? If the answer to any of these questions is yes, they are all symptoms of your engine valves being too tight. Engine valves tighten over time after extensive use.
This is a key test to run before you go through the trouble of disassembling your carburetor. To set up this test start up your scooter and ensure the choke is off if your scooter has a manual choke. Most modern scooters have an automatic choke so don’t worry.
I have a 2011 Rocketa 49.3 GY6 139QMB and have replaced the carburetor, petcock valve, CDI, all of the vacuum lines, adjusted the air flow and gas until it idles perfect and then, when I take off, it makes it two blocks, bogs down and dies! It will continue doing this about 5 or 6 times and then start running good but not great.