peugeot vivacity 50cc not running right HELP PLZ

[plodwin]

please help im pulling my hair out i have put a new engine in but will only start on kickstart not key start but when you try to ride it it goes backwards

[Suntan Sid]

Seriously?

I want a video!
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[Pol Anorl]

are you sitting the right way?
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[plodwin]

Yes my nephew was sitting the right way but could it be the satar cause I've changed that part

[Iain.]

You can actually make a two stroke start and run backwards. They sound a bit odd, had an RC car do it once.

Would reccomend taking all the kickstart mech out, thoroughly cleaning it, regreasing it then refitting. Sounds like it's staying engaged when the kickstarts springing back.

Electric starts probbably a wiring fault, is the solenoid clicking?

[plodwin]

Thanks for the reply will try that with kickstart the starter solenoid is not clicking

[Suntan Sid]

I know sod all about peds, so assumed it was 4t!
A 2t will run backwards, the ignition timing is out!

Read this thread:-

https://www.bikechatforums.com/viewtopic.php?t=228345
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[Iain.]

I'd quite like to try running a four stroke backwards.

I mean clamping a carb onto the exhaust stub can't be THAT hard surely?

[plodwin]

I'm new to all this how do you set the timing plz

[andys675]

sorry matey, I'll bet your woodruff key is missing or broken, you say you've replaced the stator, did you see a half moon piece of metal slotted in the crank? that has to be lined up with the flywheel and holds it in one place so it spins at engine speed and the timing pickup senses the timing point, if it is missing or broken the flywheel isn't locked by it at engine speed and it can at a different speed to the crank therefore upsetting the timing point, it's not a case of setting up the timing, the timing is set by the woodruff key holding the flywheel at a set point on the end of the crank.
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[plodwin]

Yes woodruff key is there

[plodwin]

Thought I would give you update timed it all up still goes backwards but as soon as I unplug the cdi unit plug it back in it goes forward so does anything it could be cdi unit plz