You could try old oil for the running in period, or just "age" some by adding some swarf and a bit of grinding paste.
Every bike I buy seems to have had that done to it just before I buy it
Anyway, if you kill it you get another one to replace it FOC- that's what a guarantee is all about, isn't it?
And the less it's got in, the lighter it is- and that means faster
(try less brake fluid for the full effect, and drain a bit out of the battery).
This is tip #16 in Tony's Tips, a regular feature whenever someone buys a better bike than mine.
Tip of the day: Fit extra washers under the spark plugs- leaves more space in the combustion chamber, so increases capacity!
Just like fitting a big bore kit
It's not falling off, it's an upgrade opportunity.