Dead MZ 300

[Deedum9]

Hi all
Newbie here and just purchased what was a running 1996 MZ300.
Collected it, checked all oils, tyres etc, sorted insurance and set off for a spin on the trusty old 2stroke.

Managed about a mile or so changed up into 3rd and then hesitation, smoke, lack of revs and wouldn't pull.
I pulled over it was idling badly barely ticking over lots of smoke and then stopped. I couldn't start it again, seems to have compression though.
Now sat in the shed, fuel seems ok and running freely, any thoughts or ideas please

Thanks in anticipation
Steve

[arry_b]

Choke bung not sealing properly. The over rich mixture kills the plug.

I bought a 1994 301 with the same problem. £5 spent on a new bung and a plug and it took me touring in France.

[Deedum9]

choke bung ? I really am new to this

[therealche]

So part 16 ( a rubber washer) has a habit of dropping off part 15 ( brass......thing!) and blocking the starter circuit in the carb. So the engine is runs very rich

[Deedum9]

wow, thank you ok, i'll check that too

[Deedum9]

She lives !!!
Had some time tonight and tried to find the points and check them out.
Removed the cover and there's a group of wires running to the front and one thinner wire from the same loom running to the back,connects into a tiny screw ?
The wire was burnt out/snapped, anyway fixed the wire and started her up , all good.
So question is, what was this wire please ?

[DAVID THOMPSON]

what was the color of the wire
if brown that is usually a ground
dave

a good quality picture would be great so others would know where to look

[Deedum9]

Yes sorry , I will take a picture, but it was quite thin and blue or green

[arry_b]

That's the wire to neutral switch.

I suspect your red box has started working again. This happy state of affairs is only temporary, unfortunately. It will break down again.

[therealche]

This happy state of affairs is only temporary, unfortunately. It will break down again.

so true!

[Deedum9]

not sure what it is or what it's called , but it's the small wire by the chain

[therealche]

Yes that's the neutral switch. Unlike modern complicated bikes, all it does is make the neutral light work. Now send us a picture of the generator ignition set up!

[Deedum9]

Is that the other bit on the other side

[therealche]

Its the other bit on that side which may or may not look like this

[Deedum9]

right, ok, will do, it looks clean but similar....yes