Part 2
I've followed various travelers' Ride Reports who are doing long rides on DR650's over the last few years. I see a pattern of things that seem to act up on the DR650 ... but in most cases it's ignorance and/or neglect by the rider (myself included!) that slows folks down. Luckily, overall the DR650 has proved to be a rugged and mostly bullet proof mount for long range travel.
Moto Adventure Gal (see her ride report on ADV rider)despite tons and help, sponsorship and expert advice, screwed up a lot of things on her DR, ignored sincere advice and had many costly delays as a result. Hard to remember all the issues now (many) ... and I'm not re-reading that thread again :snore:
First off she started off with a worn chain & sprockets ... so by Mexico she was screwed with a totally shot chain and no way to get a decent quality replacement. Classic amateur mistake. Used a cheap chain/sprockets ... and then just ignored
maintenance, never noticed chain was getting out of adjustment and sprockets were badly worn and clearly HOOKED.
By the time this was noticed : Trouble. But lets not pick on her, she had lots of other problems. :rant: Mostly not DR650 related.

New Sprockets anyone?
Chains
There is only one really good chain for my money. I've put over 200,000 miles on DID VM-2 X ring chains, used on several bikes, including the DR650.
Some LD riders go with a 520 conversion. This is fine, allows more gearing choices. But the 520 will not go as far as the 525. My current one is approaching 25K hard miles. (I changed sprockets at 15K miles)
Some say 520 chain/sprockets are more available in the 3rd world, but 25K out of a chain gives you plenty of time to plan ahead for service. I carry a couple countershaft sprockets with me and change them every 10K miles. This also allows modest gearing changes. Traveling I'm not tackling super technical off road, so most times stock gearing or slightly lower gearing is fine. Changing CS sprockets seems to help extend chain life.
If you do go with a 520, use the DID VM. (VM-2 not made in 520 size) I like
OEM sprockets best but JT aren't bad. I avoid the super hardened "miracle" sprockets ... they eat chain. AFAM and Renthal also good. Steel, never Aluminum.
The other common DR650 show stopper seems to be the various mysterious lock out safety switches the DR is blessed with. Best to know and understand how these work and disable them. Do a clean job of it because 20,000 miles down the road you will probably forget what you did and how you did it. :smirk:
The Kill Switch can also cause problems. Spray it and the starter button with WD40 on a regular basis to keep moisture at bay.
Go through your electrical plugs and connectors, pull them apart and lightly coat with Dielectric grease, reseal. This will slow electrolysis and reduce corrosion. Clean any corrosion at this time.

Look after connectors and plugs
Always start a long trip with a NEW battery. Change it in a year whether you think you need it or not. Use High quality sealed, MF Yuasa or other sealed MF OEM batteries.
Several travelers have had starting problems for various reasons ... so what happens is they crank and crank and crank ... next thing you know that "like new" battery is now weak and compromised, it may charge back up, but most likely will drop down quickly when cranked too much.
Fuel Filters, Fuel hose routing for the IMS tank
With an IMS tank or Safari, hose routing and placement of inline filters is important. I went through this myself. The DR needs to have the fuel inlet tube rotated around to the 9' Oclock position. I no longer use an inline filter, as this caused me problems in being able to use ALL of my fuel in the tank.
Range is now a full 230 miles until nearly dry. Before bike would stop running at about 180, with plenty of gas still in tank.

Fuel line routing. Why no filter? There are two in the tank (petcocks) and another little "Gotcha" one in the inlet fuel tube.
The "Gotcha" fuel filter (most riders don't even know it's there) It's tiny so can get full of crap quickly if you're using Barrel gas in Baja or elsewhere. I now carry two spares. But it can be (carefully) removed and cleaned about every month or so ... when on the road. Also, the IMS petcock filter also get coated with grunge. Pull the petcock once in a while and carefully clean these two filters. Flush tank with Diesel.
Basta!
Coming: Comfort, luggage, Tires, Service.