How to break in
1. warm um properly for 5min at idle so all engine components have enough time to warm up to correct operating temperature
2. ride without pillion/panniers,
3. no lugging, so no steep mountain roads, no dragging on idle in gear, no heavy engine breaking
4. go through most of the rev range ramping up/down smoothly, no pinning/flooring/gunning, vary the RPMs, but again, NO lugging
5. at begin of break in period dont exceed 10k rpm for long, near end of 1000km you can go over it
6. after ca 1h stop the bike and let it cool down completely.
7. repeat the process
bonus: if you can change oil after 250 or 500km as most micro wear occurs in this period it would be ideal. then again at 1000 to remove oil and potential residue, i recommend here flushing engine / sump with new oil (250cc) after removing used oil.
most of the other way like babying it or 'ride like it was stolen' were proven as not the best ways. nowadays engines dont need the previously critical brake in as they are run beforehand and quality of manufacturing is much more advanced than 5 or 10y ago. running on a almost fixed RPM or lugging or excessive heat or long high rpm gunning has negative side effects.
personally i complete this process in ca 5 days
Current: H2 SX SE 2018, FZ6 2010, CB1
Sold: R6 2008, 2x CBR650F ('14/'17), CBR500R, CBR250R