Well it runs but....

It still is not as powerful as it should be. I know its only an 80cc and I'm not really expecting 100mph from it but it struggles to climb the slopes in my area and I believe its not giving 100%.

The first thing I noticed is that I'm not getting the required gap at the points even with the points base plate at the furthest end of its travel. On inspection I found the points cam (which is built into the magnet/flywheel) has worn to the extent where there is an apparent lip where the points foot doesn't not rub. This will affect timing and there's no point checking on other stuff until I fix this! 

Below is the inner part of the flywheel and you can see the little ridge the points heel has worn into the metal.

1. Looking thru the slots in the flywheel you can see the edge on the lip of the centre boss.

There's a brand new one on ebay for USD216 at the moment .. gulp. But hang on.. there's a used one for USD34.74 plus USD32.50 for shipping. In the description the seller notes "No pitting of points cam. Puller threads are straight. Good, useable condition.'' . Well the seller 'çycleheapsalvage' has more than 24k of mostly positive feedback and he does address the most common failure area on these flywheels so I took a gamble on it.

Looks about the same as mine. There is a stamped M - 5 on the raised squarish part. On the flywheel from my bike it is M -9. Probably balancing  info. 

 The keyway looks good, no wear.

And most importantly the cam is practically unworn, no trace of the ridge like on my original flywheel. 

 And no ridge on the edge of the inner boss.

 Installed the flywheel and snugged it up. You need to have a proper holder to hold the flywheel while you do up the centre nut but I improvised 😊! A 3/8 socket bar with extension braced against the floor!

Here's a picture of the bike running. I took it for a spin and it definitely pulls harder and sounds better.. still sounds like a bucket of bolts though.

The clutch is still weak... with the slightly higher compression it's that much more difficult to kickstart. I have new plates, clutch basket so I need to take a look at that.

The plugs are also oily, this could be due to worn crank seals.

So looks like the next plan of action will be to pull the right side clutch cover off and have a look at the clutch.

Might take a while though so please be patient.