Congratulations on your new G5. If you have the same success with yours as I've had with my 2011 G5 Deluxe your going to be one happy camper!
The rubber strips are there to deaden high pitched sounds. I removed mine the first week, wanting as much cooling as possible in the hot Arizona deserts and I've had no problems with sound or cooling at all.
The Owners manual says to keep the speed below 40 mph and don't use over 1/2 throttle to accelerate for the first 300 miles. Short periods of 45 didn't seem to harm mine.
At 300 miles it is VERY IMPORTANT to get the oil and filter changed (or to do it yourself).
If you do it yourself, there are two drains, one large hex and one cap with two small hex bolts holding it to the bottom of the sump.
Both of these need to be removed so you can remove the debris on the pump pickup screen and the metal filings that have collected on the magnets that each drain has.
The oil filter cannot be bought at any stores in the US except for the importers supply store (known as "nfieldgear"). They sell individule filters but I recommend getting the oil filter kit that has 5 filters + some O rings if you need them).
Call them at 1-800-358-0938.
The filter kit isn't cheap but your going to need the filters anyway so go for it.
Between 300 and 600 miles, the book says you can increase the max speed to 50 mph with 3/4 throttle openings acceptable.
The next scheduled oil change is at 2000 miles but I changed the oil the second time at 1000 just to be on the safe side.
After 600 miles there is no max speed but you should know that these bikes top out at 80 mph and are happiest at around 70 max.
The engine won't be totally broken in until its passed over 1000 miles but as the milage increases so does the smoothness. Vibration seems to get less and less and it revs a little easier.
Oh. The spark plug that came in mine was a India made Bosch twin electrode style that was causing misfires. Most of us have changed that plug for a NKG BPR6ES. It makes all the difference in the world and only costs a few dollars at the local auto supply.
The book recommends using a 15-50 wt semi-synthetic oil that meets JASO MA requirements. This JASO requirement assures the engine oil (that lubes the engine, primary drive and transmission) won't screw up the wet clutch the motorcycle uses.
Almost all motorcycle specific oils meet this but many regular auto oils don't.
I've been using Mobil-1, V Twin 20-50 wt oil and its working great. I've got over 9700 miles on the bike with no oil related problems.
The book says the front tire pressure should be 18 psi and the rear should be 24 psi for solo riding. Riding two up raise the pressure to 20 front & 28 rear.
The bike runs fine on 87 octane gas and I've been using the alcohol blended stuff for almost 2 years without a problem.
Have fun.