What makes a 50 cc scooter spin at idle?
I’ve adjusted the idle up a little, to the point where the rear wheel brake that keeps the back wheel from spinning during idle is overwhelmed and starts spinning. Fuel filter isn’t clogged, and it drains fuel fine.
What to do if your motor scooter won’t idle?
If you find the intake valve is too loose, twist it by hand in a clockwise direction until you reach the desired clearance level. Once you are happy you can just about slide a .004 feeler gauge behind your intake valve then you can re-tighten the intake valve nut and reassemble the intake valve cover and the rest of your scooter.
What does it mean when your scooter won’t start?
It screws in instead of the spark plug and measures cylinder pressure. When you crank the engine you should see a reading of around 150 psi or more. If it’s 100 psi or less there’s likely and engine problem (bad valve, bad piston, failed piston rings) which will need the engine taken apart to find.
What to do if choke on scooter wont start?
If the automatic choke is OK, the starter cranks the engine, there’s gas and there’s a spark then there may be an engine problem. You need to check the cylinder compression. You need a compression tester to do this. It screws in instead of the spark plug and measures cylinder pressure.
If you find the intake valve is too loose, twist it by hand in a clockwise direction until you reach the desired clearance level. Once you are happy you can just about slide a .004 feeler gauge behind your intake valve then you can re-tighten the intake valve nut and reassemble the intake valve cover and the rest of your scooter.
What causes a scooter to have power but not start?
Check the Engine Ignition and Fuel System: In most cases, the problem with a scooter not starting but with power is caused by an issue with the engine; either a bad spark plug wire, bad plug or a fuel system problem.
What happens if you have an intake leak on a scooter?
An intake leak really messes up the air/fuel ratio on your scooter and this can cause idling issues or worse, piston damage. TOP TIP: The first place to check would be the rubber intake hose (boot) which passes fuel from your carburetor to the cylinder head. Rubber Intake hose (boot) – the first place to check!
Where is the intake valve on a scooter?
In order to access the intake valve on your scooter you will need to gain access to the engine. Removing the seat and the plastic housing which lies beneath the seat. Remove the the intake valve cover (Flat metallic box underneath the intake hose).