Trust me, after 2 minutes of the Mt Baw Baw hill climb your chains will not be broken in, but on the verge of breaking.
The last time i rode up Mt Donna Buang with an ex-girlfriend using my high-tech speed equalisation device (bungee cord tow rope), the chain measured up at 80% stretch after only 17 kilometers (10.6 miles) with 20% stretch at the start of the climb.
Must be remembered that Mt Donna Buang only has an average gradient of 6.4% and Mt Baw Baw is around 14%, so your chains will be well and truly trashed in the 6 kilometers (3.75 miles) to the summit.
I wouldn't mind betting your 4-stroke engine will most likely forcibly eject it's internal components, battling against a 22% gradient; causing an environmental catastrophe as shrapnel pierces the fuel tank, engulfing bike and rider in a fireball that endangers all and sundry, not to mention species listed under "critical stress" by the World Wildlife Foundation, i.e. tasty indigenous animals that go nicely with BBQ sauce.