PS. I'm thinking about increasing the fork spring and shock spring rates on my 640 ADV R,
I put Race Tech springs in my forks and had to use KTM springs from an adventurer for the rear shock. I have a dualsport 640. I weigh 225 and found the difference unbelievable. I thought it was jsut all there was to expect from a 300 lb bike, but know it feels like a mx bike.
Also for the fork oil I had the dealer replace it with ATF which we used to use before the marketing surge of 5, 7.5 and 10 weight stuff. Next time I am going to use synthetic ATF. I can't tell the difference in the oi between the original and the ATF. I think that ATF may lubricate better.