Modern Vespa

Hello to the kind people of this forum.

I have a problem with my PK50 XL that i can't seem to figure out. It wount start on kick, but it starts when i run it. And it runs fine, but when i leave it on idle it dies out, so i have to run with it one more time. It has only been run about 5000km.

What i have done:
- Cleaned the carb and airfilter. Checked for leaks
- Toped of with clean fuel
- Changed the sparkplug. Tightened the cable in both ends.
- Checked every wire for cracks and
- Checked the flywheel if its magnetic (and it is)
- Checked inside the flywheel for loose wireing.

Does someone know what i need to do?

I see you are based in Trondheim as well. Are you a member of the local scooterclub (TOSK)? You might get some advice on their fb page. There are a lot of knowledgeable people in the club

Last edited by psgnw on Mon Sep 21, 2020 6:57 am; edited 1 time in total

Hi,

you could turn the tickover up a bit to stop it stalling once its started but that doesnt help with it not starting on the kickstart.

What are the symptoms with the kickstart, is the kickstart engaging with the engine to turn the engine over?

Awsome dude! I will check with them. Thank you for good advice

No problem. There is a few smallframes in the club. I have a PK as well.

This is me yesterday, the scooter sounds like this:

Last edited by oyvlos on Mon Sep 21, 2020 9:02 am; edited 1 time in total

Video is not working.

try this: https://www.youtube.c o m/watch?v=cSUxwRstywA (remove the space from .c o m)

Where is the groundwire from the CDI (should be connected somewhere on the engine)? Have you checked that the wires to the CDI is seated well?

It’s screwed to the frame where the red arrow is

Aha! Have you checked that you have a spark? Wet plug after kicking?

Yes, the plug feels and smells of gasolin

Yes, the plug sparks, and feels and smells of gasolin

https://www.youtube.com/watch?v=cSUxwRstywA&feature=emb_logo

That almost looks as though its going to start at the start of the video. Are you using any throttle when kicking it over? and, is the choke on?

I know, hehe that is why is so frustrating. I used the choke and gas, yes

Just re-watched the video, Where is the key? is it switched on?

It is, the key is broken, so i have to start it using a flathead

Could it be these brushes inside the flywheel?

Don't mess with the positioning of those before you know what you are doing.

is compression good?

The compression is good i think. Just have problems starting on kick

could be so many things like air leak. Might use starting fluid to see if it can start may reveal ignition or fuel problem.

Last edited by hibbert on Tue Sep 22, 2020 2:07 pm; edited 1 time in total

try another cdi

Thank you. Am i to use starting fluid on the carborator then? How do i figure out if its fuel og ignition?

Provided there are no leaks and engine is good if it fires up on starting fluid then dies it's fuel related. If it does not fire maybe ignition. Give a squirt into the carb and see.

I have now tried with starting spray, but no differens. No start, no change. Still runs ok when i run it working. But sometimes it dies out when idle

Check compression with a gauge. What does it read ?