Needing needle rollers for your Clutch drum on a SP125, SP125C or SP105.
Heres the size 9/16 x 11/16 x 5/8 which is a standard size.
Flywheel keys to suit the Kart engines are a standard USA part #403

These also suit Most of the older Macs with keyways on both sides of the crank
ie: 1-10, 2-10, 3-10, 4-10 and the likes of the super style of engine D-44, S-55 and 1-50, 250, 450 and 550.

McCulloch odd info if your chasing items that are no longer available through dealers.

Often nowadays some items are no longer supplied by the main stream suppliers like Oregon, GB or others.

So what ever i find i'll post here in the light it will keep another old Mac up and running

Another service by Mc Bob