Oil tank empty after layup

Mike Rocket said:

I will have to run mine more often now. Looks a bit risky not to.

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That's my excuse. - It takes a fairly substantial Force Majeure to prevent it. Ice and Snow is thus classified. Or a seriously hang-over.

The rocket is a dry sump design so I like to start her up with a dry sump after the winter layup,but different strokes for different folks I guess.

Mike Rocket said:

Has anyone got a comment on this?
I laid up my 2014 roadster with 8000 miles on the clock from September 28 2017 to now, December 26 2017 and today I dipped the oil and the tank is empty. It's been standing for almost 3 months.
While I was using it even with it standing unused for 2 weeks the oil level was fine.
It has no leaks externally.
I know a check valve is supposed to keep the oil in the tank so does this usually happen when not using the bike for a few months?
Is it safe to start the engine with all the oil in the sump? Any comments welcome please.

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Just an update to this subject that has probably been posted to death. I have checked the oil level every few days and now it is a month since the oil tank drained down to the sump.(I have not run bike since I refilled the tank by running the engine a month ago which pumped back the oil to the tank within a second) It seem that in 4 weeks the oil has drained from the tank about half inch making the oil drain down after 4 months standing about 2 inches. As it's so slow a drain down I suppose there is no fault so no need to replace the check valve.
It must be a normal thing to very slowly drain down. That's why Triumph state you must run engine to correctly check oil level. It all makes sense to me now.