The satisfaction of doing your own work! And the convenience...and it's done correctly! and you saved money!..
You probably could have found cheaper oil..but Bel-Ray is a good "name brand"....
You may wish to reconsider the valve check.....the idea is that in the first couple hundred miles is when the valves "set it"...so they can be out of spec. The more miles...then they sort of stabilize...so you probably don't have to check them as often as the book recommends...
The problem with air cooled engines is that too tight exhaust valves can cause big trouble.
The RE650 is probably the easiest valves to check....(although there are 8 of 'em)
The hardest thing is to keep the gasket lined up for reassembly. You can check the valves...maybe they are all in spec...then you just close it up....but to adjust...it is simple...
Yeah lots of work to get the tank off etc...
I did mine at 400 miles...just for piece of mind...had to adjust a couple of them...
As for draining the oil completely....sure let it drain for an hour, but remember no matter how long it drains...there is still going to be a few ounces that never come out....so you have to live with that bit of old oil mixing with your nice, new, clean oil!
I do my chain every 500 miles....clean with kerosene, then Honda lube...I do my wheels and spokes at the same time....the more often you clean...the easier it is to clean.
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I just did my first service exactly at 300 miles. I ordered OEM Oil Filters ($25) from the dealer, and ordered Bel-Ray 10w-50 1 gallon (4 liters) engine oil from amazon for $65. Oil change is extremely easy task, just takes an hour or so to let the old oil to drain completely. I completed my first service under $100 with a little bit of time looking at things to make sure they are in a good condition.
I haven't done the valve/tappet adjustment as I don't see the need for it yet. The main reason I did my own oil change is because it takes an hour+ to get to the dealership and cost me $250+ USD. The weather is not perfect here yet for the long rides, and just wanted to do it at the comfort of home .
I'm learning a ton from this community, lots of tips and pointers, and full of opinions Use your judgement and reach out to this community if you are looking for extra information.
It was raining all day yesterday, and I took that as an opportunity to clean the vehicle thoroughly using mild soap water spray and a micro fiber cloth (a bunch actually). It doesn't look that dirty from the outset, but once you start cleaning, you will realize how dirty the bike is. Hard part was cleaning the wheel and spokes. They are the most dirtiest of all - especially the rear ones as I believe it is because they are close to the oily chain.
Also make sure the chain is well-oiled. Every 300 miles/500 km, it is better to check the lubrication on the chain.
Good luck!