Yes they can and do ,if we took bike on our motorways we would not be keeping with traffic,Oh yeah, may be a little different where you are. Definitely better to work through the gear range, than getting on the interstate and blasting away for hours. People can get a little impatient with you, if you aren't at least going the speed limit (or over)!
So much info out there.... Information overload. Some say do some don't.. I was not sure whether i should use synthetic from first oil change or some people say first the valves need to set which would be after first oil change before using synthetic..I tried AmsOil synthetic years ago on one of my GoldWings. They made a flush that supposedly prepared the engine for a "fresh start", using synthetic from then-on. I saw no benefit. I had a Road Glide that had Harley's synthetic in the transmission. 4th gear was a little noisy, so I went back to petroleum gear lube-noise went away. Talked to other guys with 5 speed H.D. and they agreed. I have used synthetic on vehicles I was servicing professionally, the customers requested it. Overall, I would say start it right after your initial break-in (first oil change), if you want. I personally see no benefit to it. Longer oil change intervals, maybe. I don't feel comfortable leaving my oil in the bike after 3kk, so I just use Dinosaur oil.
Yes, there are many varied opinions on oil! If you are worried about it - don't use synthetic. I don't, but that's because I have confidence in regular petroleum, and I change oil frequently. If you really think synthetic is a better way to go - use it, but I was saying I would leave the regular oil in it UNTIL you were ready for that first oil change. Then, do what you want.So much info out there.... Information overload. Some say do some don't.. I was not sure whether i should use synthetic from first oil change or some people say first the valves need to set which would be after first oil change before using synthetic..