I think that I've done as much to 1098R as I can or want to and it's time to let the next owner finish the job. It took several frustrating years after acquiring the car to get it into a road worthy condition. Dealing with a frozen Solex butterfly shaft (replaced with a Weber DFEV), multiple issues with engine cooling (finally resolved after 3-4 years of tinkering), bad master cylinder (self inflicted), moisture damaged interior, and typical intermittent starter issues.
Returned from a 20 mile shake down run this morning after about a year of the car sitting and the S2 ran without any major issues. The only cause for concern during the 20 mile drive was the low cooling temperature through out the drive. It stayed at 60 deg C even going up a 3mile uphill stretch in third gear running 4k – 4.5k rpm. It was only when I stopped to pick up the morning paper and then going up a ¼ mile hill to my property that the coolant temperature started rising with the fan coming on at around 80-85 deg C. I have a low temperature (72 deg C) thermostat installed, wonder if it's stuck open.
I learned a lot dealing with and fixing the issues on the S2 to get in running condition again. The biggest lesson was not to be a hack; a bigger hammer will not always fix things and have the right tool. I'll have it up for sale in a few weeks after putting a few more test more miles on it.