Join Date: Dec 2015
Location: Orange California
It isn't necessary to replace the gaskets every inspection. Wipe them down and reinstall...they're pretty tough will last numerous times. Manual suggest every 12,000 miles...go by miles not time for valve checks. After second check (24,000 miles) without much movement I'd go to that 18,000 interval as you mentioned.
thats a good plan i guess,
do it at 12k, 24k, then start doing it once per 2 years or once every 18k. (depends on the miles per yeaR)
regarding the gaskets, it should be replaced. it's not about tough, it's about rubber being torqued in and changing shape.
luckily however, on GS the cylinder head is outside and if you do have a gasket failure you will see the leak and then replace it!
2016 1200GS ADVENTURE WITH ALL THE GOODIES