I will add that it looks like there is nothing in that size .

You may be able to source a Kenda K761 from O/S .

It may sound odd, but I'd suggest trying to source a Fatbob front for the rear :

Then do a little re-grooving .

NZ has these....

Can that it's a front, google led me astray, bloke from motorcycle tyre warehouse set me straight, there are zero available in our market like you said speedzter, I'm thinking cheap is the way to go now lol.

For dirt riding, having grip on the front is a bit more important than the rear, so that part is easy to sort . 

Shinko is pretty big these day, a lot of Harley guys are running them (unsure what version in a 130 - 712 ? - bargain $).

Kenda is also big in the dirt market, but unsure of their road tyres.
I'm sure the 671 will be fine ( been around for over 10 years like the Shinko 712). 

I've gone through a lot of 4.10 x 19 Dunlop K81s on the Sporty. It's a 60s style tyre so it's got big tread grooves and it's got big separate blocks around the tread edge. I've got a 21 front now with an Avon Trekrider on it, typical modern adv tyre, and I wouldn't guarantee it's any better performing on dirt than the old style Dunlop. The other thing, they have a stiff sidewall so cope OK with dropping the pressure to under 25 psi, spreading out to give a big footprint.

Pulled the seals to check the bearings condition and see what the shim pack thickness was, shims were in the wrong side, clueless to whether that matters or not, discounting the stepped washer the pack was .8 of a mm but that's a moot find as the pulley side bearing was toast.

EasyR sell an All balls kit, they any good? I could chase up the timkin bearing separately but by the time you add bearings and seals and postage you are at roughly the same price point.

I don't have a tapered bearing remover installer, I only have a stick welder and I'm not keen on putting a bead on the bearing with that, I can get one on flea bay for just under 80 bucks, maybe that's the ticket?

If you had a local bearing supply shop it might be different. 

Tapered bearings are good and bad .

Superior in lots of ways, but a lot more work to set up. 

Stick welders suck for that sort of work !