Kevm

If the remains of the flywheel wont come off with a puller you will have to carefully cut it off and split it with a grinding disc.
IF the crank isn’t ruined then there is no reason why you shouldn’t just fit a new coil, condenser and points and away you go.
Way cheaper, and less bother than messing with coils and batteries.

Tyres should be pointing forward same as a tractor, if you hit a big stone the rotor will jump up but it won’t push the machine forward – it’s too heavy.
Even if it does that is far better than breaking something and why are you rotavating big stones.
Get an ultrasonic cleaner, you can get cheap ones on ebay for £30 or £80 – 120 for a good q…[Read more]

Soldering is best but you have to get it really clean first then once the holes are covered/filled coat the inside with POR15 I have used it many times on all sorts of fuel tanks and it is brilliant stuff.
You could clean it up, fill the holes with filler of your choice then POR15 inside.

You don’t need to remove the wheel and getting the gib key out could be a whole lot of unnecessary hassle.
Just remove the guard and clean up the clutch mechanism there is not a lot that can go wrong with the actual dog clutch inside the gearbox.

To get the flywheel off you just undo the centre bolt and keep undoing it – pop.
Don’t break the flywheel fins.

I am near Inverurie, got a Gem with a JAP engine and a 350 with a Kohler, both good machines.