I decided to go with some heavier springs because I'd scraped the bottom of the engine a few times, mostly in my awkward parking arrangement and once going a bit quick over some bad railway tracks. I added the bmw aluminum engine guard that I think either the 650GS or 800GS should have, but just proceeded to scape it up too. Generally, I found I was using all of the travel too easily. YMMV. <o> </o> The springs are by Wirth and are distributed by TT as part number 040-0495 for about $180 CAN. They didn't appear to come with any instructions but what they did come with was all in German so I'm not too sure. The following posts are a few pics of the installation, and a comparison with the stockers. <o> </o> The fork cap on these bikes is of the circlip type. Here I'm pushing the cap in to expose the circlip for removal. BTW, the front wheel is off the ground for all of this. This pic also gives you a good look at the TT handlebar risers. I have no affiliation, honest.